8                                            Terrestrial Ecology Impact Assessment

8.1                                      Introduction

This section presents the ecological baseline information gathered from the literature review and field surveys, which covered a period of 6 months of both wet and dry seasons (February to July 2004) to establish the baseline ecological conditions of the Study Area (covering the headland of Black Point and up to 500 m from the Project boundary).  Additional ecological surveys were conducted in October 2005 to review and update the existing ecological profile. 

This section also presents the results of an assessment of the ecological importance of the terrestrial habitats and resources at Black Point and the potential impacts from the construction and operation of the proposed Liquefied Natural Gas (LNG) terminal.  The assessment has been based on the preliminary design of the Black Point terminal as discussed in the Project Description (Part 3 – Section 3).  Measures required to mitigate adverse impacts are recommended, where appropriate.

8.2                                      Legislative Requirements and Evaluation Criteria

Relevant legislative requirements and evaluation criteria for the protection of species and habitats of terrestrial ecological importance are summarized as follows:

1.                Country Parks Ordinance (Cap 208);

2.                  Forests and Countryside Ordinance (Cap 96);

3.                  Wild Animals Protection Ordinance (Cap 170);

4.                  Protection of Endangered Species of Animals and Plants Ordinance (Cap 586);

5.                  Town Planning Ordinance (Cap 131);

6.                  Hong Kong Planning Standards and Guidelines Chapter 10 (HKPSG);

7.                  The Technical Memorandum on Environmental Impact Assessment Process under the Environmental Impact Assessment Ordinance (EIAO-TM);

8.                  United Nations Convention on Biodiversity (1992);

9.                  Convention on Wetlands of International Importance Especially as Waterfowl Habitat (the Ramsar Convention); and,

10.              PRC Regulations and Guidelines.

 

8.2.1                                Country Parks Ordinance (Cap 208)

The Country Parks Ordinance (Cap 208) provides for the designation and management of Country Parks and Special Areas.  Country Parks are designated for the purpose of nature conservation, countryside recreation and outdoor education.  Special Areas are designated mainly for the purpose of nature conservation.

8.2.2                                Forests and Countryside Ordinance (Cap 96)

The Forests and Countryside Ordinance (Cap 96) prohibits the felling, cutting, burning or destroying of trees and growing plants in forests and plantations on Government land.  The subsidiary Forestry Regulations prohibit the picking, felling or possession of listed rare and protected plant species.  The list of protected species in Hong Kong which comes under the Forestry Regulations was last amended on 11 June 1993 under the Forestry (Amendment) Regulation 1993 made under Section 3 of the Forests and Countryside Ordinance.

8.2.3                                Wild Animals Protection Ordinance (Cap 170)

Under the Wild Animals Protection Ordinance (Cap 170), designated wild animals are protected from being hunted, whilst their nests and eggs are protected from destruction and removal.  All birds and most mammals, including all cetaceans, are protected under this Ordinance, as well as certain reptiles, amphibians and invertebrates.  The Second Schedule of the Ordinance that lists all the animals protected was last revised in June 1997.

8.2.4                                Protection of Endangered Species of Animals and Plants Ordinance (Cap 586);

The Protection of Endangered Species of Animals and Plants Ordinance (Cap 586) was enacted to align Hong Kong to control regime with the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). With effect from 1 July 2006, it replaces the Animals and Plants (Protection of Endangered Species) Ordinance (Cap 187).  The purpose of the Protection of Endangered Species of Animals and Plants Ordinance is to restrict the import and export of species listed in CITES Appendices so as to protect wildlife from overexploitation or extinction.  The Ordinance is primarily related to controlling trade in threatened and endangered species and restricting the local possession of them.

8.2.5                                Town Planning Ordinance (Cap 131)

The recently amended Town Planning Ordinance (Cap 131) provides for the designation of areas such as “Coastal Protection Areas”, “Sites of Special Scientific Interest (SSSI)”, “Green Belt” and "Conservation Areas” to promote conservation or protection or protect significant habitat. 

8.2.6                                Hong Kong Planning Standards and Guidelines (HKPSG) Chapter 10

Chapter 10 of the HKPSG covers planning considerations relevant to conservation.  This chapter details the principles of conservation, the conservation of natural landscape and habitats, historic buildings, archaeological sites and other antiquities.  It also addresses the issue of enforcement.  The appendices list the legislation and administrative controls for conservation, other conservation related measures in Hong Kong and Government departments involved in conservation.

8.2.7                                Technical Memorandum on Environmental Impact Assessment Process under the Environmental Impact Assessment Ordinance (EIAOTM)

Annex 16 of the EIAOTM sets out the general approach and methodology for assessment of ecological impacts arising from a project or proposal, to allow a complete and objective identification, prediction and evaluation of the potential ecological impacts.  Annex 8 recommends the criteria that can be used for evaluating ecological impacts.

8.2.8                                Other Relevant Legislation

The Peoples’ Republic of China (PRC) is a Contracting Party to the United Nations Convention on Biological Diversity of 1992.  The Convention requires signatories to make active efforts to protect and manage their biodiversity resources.  The Government of the Hong Kong Special Administrative Region has stated that it will be “committed to meeting the environmental objectives” of the Convention.

The Convention on Wetlands of International Importance Especially as Waterfowl Habitat (the Ramsar Convention) applies to the HKSAR.  The Convention requires parties to conserve and make wise use of wetland areas, particularly those supporting waterfowl populations.  Article 1 of the Convention defines wetlands as ‘areas of marsh, fen, peatland or water, whether natural or artificial, permanent or temporary, with water that is static or flowing, fresh, brackish or salt, including areas of marine water the depth of which at low tide does not exceed six meters.’.  The Mai Po/Inner Deep Bay wetland was declared a Wetland of International Importance (“Ramsar site”) under the Convention in 1995.

 

The PRC in 1988 ratified the Wild Animal Protection Law, which lays down basic principles for protecting wild animals.  The Law prohibits the killing of protected animals, controls hunting, and protects the habitats of wild animals, both protected and non-protected.  The Law also provides for the creation of lists of animals protected at the state level, under Class I and Class II.  There are 96 animal species in Class I and 156 in Class II.  Class I provides a higher level of protection for animals considered to be more threatened.

8.3                                      Ecological Study Area

The Study Area for the ecological assessment is based on the footprint of the proposed LNG terminal at Black Point and the surrounding land-based habitats (500 m from the Project Area), which is approximately 120 ha.  The Black Point LNG terminal is proposed to be located on the north face of the Black Point headland, as presented in Figure 8.1.  Due to the steep slopes on the existing headland, some reclamation will be required to provide sufficient land for development.  The jetty for the LNG carrier extends northwest, perpendicular to the coastline. 

8.4                                      Terrestrial Ecological Resources

This section details the baseline conditions of terrestrial ecological resources at Black Point. 

8.4.1                                Description and Historical Background of Black Point

The northwest New Territories has a long history of human impact on the landscape, from deforestation and repeated hill fires on granitic slopes.  The steep terrain of the Castle Peak Range has mainly grass cover due to exposure to strong wind, thin top soil and frequent erosion ([1]). 

Black Point is the western most part of the New Territories, and is comprised of a headland extending from the east (land) to the west (sea) with granitic soil underneath, typical of the Tuen Mun and Castle Peak areas.  The major development at Black Point was the Black Point Power Station (BPPS), (the first natural gas-fired plant in Hong Kong) which is located at the north side of the headland.  The lowland areas on the southeast face of the headland are occupied by orchards, a barging point and fabrication yard for Shenzhen Western Corridor Project and a cargo storage site.  The orchard was originally cultivated land, managed by villagers in the 19th century ([2]). 

An aerial photograph of Black Point (2003) is shown in Figure 8.2.

8.4.2                                Literature Review

Methodology

A preliminary desktop study and literature review has been conducted to determine the existing conditions within the Study Area, which encompasses the area within 500m of the proposed Project Area (Figure 8.1).  The literature review included Government and private sector reports, independent and Government published literature, academic studies, vegetation maps, recent aerial photographs and land use maps.  These included, but not limited to:

·  EIA of the Proposed 6000 MW Thermal Power Station at Black Point: Initial Assessment Report ([3]);

·  Aerial photographs of Black Point ([4]);

·  Porcupine! ([5]);

·  The Ecology and Biodiversity of Hong Kong ([6]);

·  Hong Kong Biodiversity. Agriculture, Fisheries and Conservation Department Newsletters;

·  Annual Report of the Hong Kong Bird Watching Society;

·  Butterfly Watching in Hong Kong ([7]);

·  Field Guide to Butterfly Watching in Hong Kong ([8]);

·  Field Guide to the Dragonflies of Hong Kong ([9]);

·  Gymnosperms and Angiosperms of Hong Kong ([10]);

·  Hong Kong Amphibians and Reptiles ([11]);

·  Hong Kong Butterflies ([12]);

·  Orchidaceae of Hong Kong ([13]); and,

·  The Avifauna of Hong Kong ([14])..

Results

The results of the literature review indicated that limited information was available on the terrestrial ecological resources in the Study Area.  This information is summarised in the following sections.

Habitat and Vegetation

Most of the area surrounding Black Point exhibited signs of disturbance and appears to contain no special communities or species ([15]).  This is related to the high frequency of hill fires, common in rural areas, which maintains a grassland habitat on the hillsides ([16]).  The habitat types recorded at Black Point have been reported in a previous ERL study ([17]). 

In general, probably due to the relatively sheltered position and thicker top soil on the north slopes, the headland has comparatively denser and taller shrub cover on the north face than the south.  The latter is largely grassland with scattered barren boulders.  This type of vegetation is an unpromising habitat for mammals, other than the common hillside rat. 

The vegetation of Black Point consisted of a mosaic of grassland, fernland and shrubland communities, with all possible intermediates.  The grassland was dominated by Ischaemum spp., Arundinella sp., Eulalia sp. and Cymbopogon sp., whereas the shrubland mainly consisted of Rhodomyrtus sp., Eurya sp. and Rhaphiolepis sp.  The fernland consisted of a pure stand of Discranopteris linearis, which is an indicator plant for habitat frequently burned. 

The southern fringe of the headland is a levelled area which was once actively cultivated.  Most of the cultivated fields have been converted to orchard and was under active management ([18]).  There was no native woodland or shrubland and only a few planted trees were present, which are mostly exotic.  They did not constitute a significant wooded area. 

Land that was not cultivated was covered in a varying mixture of native (eg Ischaemum spp. and Cymbopogon sp.) and exotic weedy species (Agave sp. and Crassocephalum sp.), whereas at the rear of the rocky shore along the coastline was a mixture of native coastal species (Hibiscus sp. and Scaevola sp.).  The poor vegetation at Black Point contributed to the generally poor ecological value of the site ([19]).

Birds

From the HKBWS Breeding Bird Survey ([20]), 27 species were recorded at Black Point, shown in Table 8.1.  The majority are common and widespread in Hong Kong of which the Black Kite, Greater Coucal, Chinese Pond Heron, Bonelli’s Eagle and White-bellied Sea Eagle are recognised as Class II Protected Species in PRC and Appendix 2 of CITES.

 


Table 8.1      Bird Species Recorded in Black Point in HKBWS Breeding Bird Survey

Common Name

Species Name

Status

Black Drongo

Dicrurus macrocercus

Widespread and common.

Black Kite

Milvus migrans

Widespread and common in Hong Kong, Class II Protected Species in PRC and Appendix 2 of CITES.

Black-collared Starling

Sturnus nigricollis

Widespread and common.

Blue Magpie

Urocissa erythrorhyncha

Widespread and common.

Bonelli’s Eagle

Hieraaetus fasciatus

Localised in Hong Kong, Class II Protected Species in PRC and Appendix 2 of CITES.

Chinese Bulbul

Pycnonotus sinensis

Widespread and common.

Chinese Francolin

Francolinus pintadeanus

Widespread and common.

Chinese Pond Heron            

Ardeola bacchus

Localised in Hong Kong, Class II Protected Species in PRC and Appendix 2 of CITES.

Common Kingfisher

Alcedo atthis

Widespread and common.

Common Koel

Eudynamys scolopacea

Widespread and common.

Common Magpie     

Pica pica

Widespread and common.

Common Tailorbird

Orthotomus sutorius

Widespread and common.

Crested Myna            

Acridotheres cristatellus

Widespread and common.

Greater Coucal

Centropus sinensis

Localised in Hong Kong, Class II Protected Species in PRC and Appendix 2 of CITES.

Hair-crested Drongo

Dicrurus hottentottus

Widespread and common.

Little Egret

Egretta garzetta

Widespread and common.

Long-tailed Shrike

Lanius schach

Widespread and common.

Masked Laughingthrush

Garrulax perspicillatus

Widespread and common.

Oriental Magpie Robin

Copsychus saularis

Widespread and common.

Red-whiskered Bulbul

Pycnonotus jocosus

Widespread and common.

Richard’s Pipit

Anthus richardi

Widespread and common.

Sooty-headed Bulbul            

Pycnonotus aurigaster

Widespread and common.

Spotted Dove

Streptopelia chinensis

Widespread and common.

White Wagtail

Motacilla alba

Widespread and common.

White-bellied Sea Eagle

Haliaeetus leucogaster

Localised in Hong Kong, Class II Protected Species in PRC and Appendix 2 of CITES.

White-throated Kingfisher

Halcyon smyrnensis

Widespread and common.

Yellow-bellied Prinia

Prinia flaviventris

Widespread and common.

Mammals

The literature review revealed that limited information on mammals was available within the Study Area. 

Herpetofauna

The literature review revealed that limited information on herpetofauna was available within the Study Area. 

Invertebrates

Dragonfly

The literature review revealed that limited information on dragonflies was available within the Study Area. 

Butterflies

The literature review revealed that limited information on butterflies was available within the Study Area. 

Stream Fauna

The literature review revealed that limited information on stream fauna was available within the Study Area.

8.4.3                                Baseline Ecological Surveys

8.4.4                                Methodology

Following a literature review of available ecological information characterising the Study Area, reconnaissance surveys were undertaken in February 2004 to update and field check the validity of the information gathered in the review and to fill information gaps.  A number of more focussed baseline field surveys were then carried out to characterise the existing ecological conditions. 

The baseline surveys covered a period of six months during both dry (February to March 2004) and wet (April to July 2004) seasons.  Additional ecological surveys were conducted on 27 and 28 October 2005 to review and update the existing ecological profile of the Study Area.

The following baseline surveys were identified as necessary and the details are summarized in Table 8.2.


Table 8.2          Types and Dates of Baseline Surveys

Survey Type

Methodology

Date

Habitat and Vegetation

Habitat mapping and vegetation identification through ground truthing in major habitats.

16 February, 19 and 29 March, 15 July 2004, 27 and 28 October 2005.

Bird

Quantitative (point count method) and qualitative (recorded within Study Area) survey; including day and night surveys covering both wet and dry season.

22, 29 February, 6 and 13 March, 12 April, 23 May, 19 June and 15 July 2004.  Recent field verification was undertaken on 27 and 28 October 2005.

Mammal

Quantitative (active searching along the survey transect) and qualitative (recorded within Study Area); including day and night surveys covering both wet and dry season.

14, 16 and 29 February, 9 March, 19 April, 23 and 25 May and 9 July 2004.  Recent field verification was undertaken on 27 and 28 October 2005.

Herpetofauna

Quantitative (active searching along the survey transect) and qualitative (recorded within Study Area); including day and night surveys covering both wet and dry season.

14, 16 and 29 February, 9 March, 19 April, 23 and 25 May and 9 July 2004.  Recent field verification was undertaken on 27 and 28 October 2005.

Butterfly

Quantitative (point count method) and qualitative (recorded within Study Area) survey; including only day surveys covering both wet and dry season.

14, 16 and 29 February, 9 March, 19 April, 23 and 25 May and 9 July 2004.  Recent field verification was undertaken on 27 and 28 October 2005.

Dragonfly

Quantitative (point count method) and qualitative (recorded within Study Area) survey; including only day surveys covering both wet and dry season.

14, 16 and 29 February, 9 March, 19 April, 23 and 25 May and 9 July 2004.  Recent field verification was undertaken on 27 and 28 October 2005.

Aquatic fauna

Active searching in stream, including only day surveys covering both wet and dry season.

16 February and 25 May 2004.  Recent field verification was undertaken on 27 and 28 October 2005.

Habitats and Vegetation

Field surveys focussing on the habitats and vegetation within the Study Area were performed on 16 February, 19 and 29 March, 15 July 2004, 27 and 28 October 2005.  The aim of the surveys was to record and map habitat characteristics and distribution, as well as floral composition within the Study Area, and to establish the ecological profile.  The methodologies of habitat and vegetation survey made reference to those proposed in the Technical Guidance Notes 7/2002 and 10/2004 of the EIA Ordinance.  

Habitats were mapped based on recent government aerial photographs (year 2003) and field ground truthing, and are presented in Figure 8.3.  Representative areas of each habitat type were surveyed on foot.  Plant species of each habitat type encountered and their relative abundance were recorded with special attention to any rare or protected species.  Nomenclature and conservation status of plant species follow Xing et al (2000) ([21]), Wu and Lee (2000) ([22]) and AFCD (2003) ([23]).  The habitat mapping and vegetation surveys were undertaken by an experienced vegetation specialist.

Birds

The methodology for the bird surveys made reference to those proposed in the Technical Guidance Notes 7/2002 and 10/2004 of the EIA Ordinance.  The quantitative (point count method) bird surveys were undertaken in the major habitat types (plantation, shrubland, shrubby grassland, stream/channel, orchard and developed area) within the Study Area.  Locations of sampling points are shown in Figure 8.4. 

Bird surveys were conducted on 22 and 29 February, 6 and 13 March, 12 April, 23 May, 19 June and 15 July 2004 covering both dry and wet seasons.  Night surveys for birds were conducted on 29 February and 19 June 2004.  Qualitative surveys were undertaken on 27 and 28 October 2005 to update the ecological profile of the Study Area. 

For the point count method, a total of ten minutes was spent counting birds at each point for each visit.  All birds seen or heard within 30 m of each point were counted and identified to species where possible.  Relative abundance of birds recorded within point count sites has been expressed as mean number of birds per sampling point and per sampling time (total birds counted divided by total number of point count sites surveyed and total number of visits).  Species richness was expressed in terms of mean number of species per sampling point and per sampling time. 

All the bird species encountered outside counting points but within the Study Area were also recorded in order to produce a complete species list.  Signs of breeding (e.g., recently fledged juveniles and the presence of actively used nest) and the habitat utilisation of different species was also recorded.  Ornithological nomenclature followed Carey et al (2001) ([24]).

Mammal

The methodology for the mammal surveys made reference to those proposed in the Technical Guidance Notes 7/2002 and 10/2004 of the EIA Ordinance.  As most mammals occur at low densities, all sightings, tracks, and signs of mammals were actively searched.  Surveys were focussed on areas within 10m either side of the survey transects (Figure 8.4). 

Mammal surveys were carried out on 14, 16 and 29 February, 9 March, 19 April, 23 and 25 May and 9 July 2004 covering both dry and wet seasons.  A night survey for mammals was carried out on 25 May 2004.  Qualitative surveys were undertaken on 27 and 28 October 2005 to update the ecological profile of the Study Area.  Nomenclature for mammals follows Wilson and Reeder (1992) ([25]).

Herpetofauna

The methodology for the herpetofauna surveys made reference to those proposed in the Technical Guidance Notes 7/2002 and 10/2004 of the EIA Ordinance.  All reptiles and amphibians were recorded by direct observation and active searching in potential concealed locations such as in leaf litter, under stones and logs.  Auditory detection of species-specific advertisement calls was used to survey frogs and toads.  Surveys were focussed on areas within 10 m either side of the survey transects (Figure 8.4). 

Herpetofauna surveys were carried out on 14, 16 and 29 February, 9 March, 19 April, 23 and 25 May and 9 July 2004 through active searching within the Study Area covering both dry and wet seasons.  A night survey for amphibians was carried out on 25 May 2004.  Qualitative surveys were undertaken on 27 and 28 October 2005 to update the ecological profile of the Study Area.  Nomenclature used in this report for reptiles follows Karsen et al (1998) ([26]) while that for amphibians follows Lau and Dudgeon (1999) ([27]) and AFCD (2005) ([28]).

Invertebrate (Dragonflies and Butterflies)

The methodology for the invertebrate surveys made reference to those proposed in the Technical Guidance Notes 7/2002 and 10/2004 of the EIA Ordinance.  Dragonflies and butterflies of different habitats within the Study Area were surveyed on 14, 16 and 29 February, 9 March, 19 April, 23 and 25 May and 9 July 2004 using the transect count method.  Qualitative surveys were undertaken on 27 and 28 October 2005 to update the ecological profile of the Study Area. 

During the transect count surveys, all of the dragonflies and butterflies found within 10 m either side of the transect (except for stream/channel) were identified and counted.  The locations of the survey transects for dragonflies and butterflies are shown in Figure 8.4. 

Stream habitat within the Study Area was surveyed using the point count method, due to the small size of this habitat.  For the point count method, a total of five minutes was spent counting butterflies and dragonflies at each point for each visit.  All butterflies and dragonflies seen within 10 m of each point were counted and identified to species where possible.  Relative abundance of the dragonflies and butterflies in each type of habitat were estimated.  Dragonflies and butterflies encountered outside survey transects and counting points but within the Study Area were also recorded in order to produce a complete species list.  Nomenclature for butterflies follows Walthew (1997) ([29]) and Yiu (2004) ([30]) and dragonfly nomenclature follows Wilson (2004) ([31]).

Aquatic Fauna

The methodology for the aquatic fauna surveys made reference to those proposed in the Technical Guidance Notes 7/2002 and 10/2004 of the EIA Ordinance.  Field surveys were undertaken on 16 February and 25 May 2004 to identify the water bodies and aquatic resources in the Study Area.  Qualitative surveys were undertaken on 27 and 28 October 2005 to update the ecological profile of the Study Area.  The stream fauna were studied by direct observation and active searching.  The classification of the stream fauna followed Chong and Dudgeon 1992 ([32]), Nelson 1994 ([33]) and AFCD (2004) ([34]) while the conservation status of the stream fauna followed Fowler 1972 ([35]), AFCD (2004) ([36]), Yue and Chen 1998 ([37]).

The information presented in the following sections is based on the findings of the baseline surveys performed during the period February to July 2004 and October 2005.  The baseline ecological conditions have been evaluated based on the criteria laid out in Annexes 8 & 16 of the EIAO-TM.  The findings of the baseline surveys undertaken at Black Point were also used to compare with other coastal areas in the vicinity including North Lantau, West New Territories, and Lung Kwu Chau, in order to obtain a more comprehensive understanding of the existing resources and ecological importance of Black Point. 

Results of Baseline Ecological Surveys

Existing Habitat and Vegetation

Black Point is the western most part of the New Territories, extending as a promontory approximately 1 km westwards of the general outline of the coast.  The Study Area lies on this headland.  Areas within the Study Area are covered by shrubland and shrubby grassland, a small patch of exotic plantation along the eastern fringe of the headland, a seasonal stream of short length and two channels, a developed area including the power station, barging point and fabrication yard for Shenzhen Western Corridor Project and wastelands located at the northern and southern fringes of the headland and an orchard under active management for cultivation of fruits located at the southern fringe of the headland. 

As a result of the long history of deforestation, repeated hill fire and exposure to strong wind, thin top soil and frequent erosion, the headland within the Study Area is comprised of shrubland and shrubby grassland, without any significant woodland area.  Shrubland covers the steep terrain, the gulley and the sheltered areas of the headland where sufficient water supply is present.  Shrubby grassland with scattered barren rocks was found along the ridges of the headland.  Electricity transmission lines, helipad and marine radar station are also present on the headland.

A total of 91 plant species were recorded (Table 1 of Annex 8) within the Study Area.  Two locally protected plant species, Pitcher plant Nepenthes mirabilis and Bamboo Orchid Arundina graminifolia were recorded within the Study Area.  A habitat map of the habitat types surveyed is presented in Figure 8.3.  Table 8.3 lists the number of plant species recorded in each habitat type.

Table 8.3          Habitat Types Recorded Within the Study Area

Habitat Type*

Area (hectare)/

Length (Km)

Number of Plant Species Recorded

Plantation

2.9 ha

18

Shrubland

46.6 ha

70

Shrubby Grassland

18.2 ha

25

Stream/Channel

7.2 Km

18

Orchard

1.4 ha

6

Developed Area

43.6 ha

7

   Note: *     Bare rocks, artificial shore and sandy beach were grouped to marine ecological resources and will be discussed in detail in Part 3 Section 9.

Plantation

Plantation is defined as man-made woodland with a selection of particular tree species that are well adapted to the adverse conditions of hillsides in Hong Kong ([38]).  In Hong Kong, plantation consists of several exotic and fast growing species such as Acacia confusa and Lophostemon conferta, which are planted to establish as canopy species and provide habitat for colonisation of native undergrowth.  Plantation was found as a small area (total 2.9 ha) beside the power station and along the pathway from Yung Long Road to the barging point and fabrication yard for Shenzhen Western Corridor Project.  Photographic records of plantation within the Study Area are shown in Figure 8.5. 

The plantation was dominated by exotic plant species including Acacia confusa, Albizia lebbeck, Melaleuca leucadendron, Lophostemon conferta and Cassia surrattensis.  The plantation was young in age (less than 15 years) with a developed canopy that reached heights of 10 to 12 m.  The understorey was open and sparsely vegetated by native shrubs and climbers including Rhodomyrtus tomentosa, Melastoma candidum, Melastoma sanguineum, Dalbergia benthami and Dalbergia millettii.  Eighteen plant species were recorded within the plantations and no rare/protected species were found.  The floral diversity and structural complexity of the plantation were low.

It can be seen from Table 2a of Annex 8 that plantations in most of the areas in the vicinity selected for comparison were low in floristic diversity and structural complexity and the dominant plant species are mostly exotic and fast growing.  In conclusion, the ecological importance of plantation at Black Point is low.

Shrubland

Shrubland is defined as woody vegetation with a modal height of between 1 m and 4 m and is in a transitional stage in the ecological succession between grassland and woodland/forest ([39]).  Shrubland was the main habitat covering the headland and was also located in gulley.  Photographic records of shrubland within the Study Area are shown in Figure 8.6.  The continuous patches of shrubland at the northern and western parts of the Study Area, which were more sheltered than that of the southern part, were densely vegetated with native shrubs and climbers.  The vegetation was well developed and the canopy species reached a height of 2 to 3 metres. 

Shrubland at the southern part of the Study Area had a lower percentage cover of shrub species than that of the west and north parts and was more subject to natural erosion and human disturbance.  A greater amount of rocks were found in the shrubland at the southern part. 

Shrubland was dominated by native plant species including Celtis sinensis, Aporusa dioica, Cassytha filiformis, Gordonia axillaries, Litsea rotundifolia, Sterculia lanceolata and Caesalpinia vernalis.  A total of 70 plant species were recorded within the shrubland and all of them are common or very common in Hong Kong.  The exceptions were two locally protected plant species, the Pitcher Plant Nepenthes mirabilis and the Bamboo Orchid Arundina graminifolia.  Both of these were recorded at the northwest part of the shrubland (Figure 8.7).  Bamboo Orchid Arundina graminifolia is a herb that usually inhabits grassland or streamsides in Hong Kong.  The Pitcher Plant Nepenthes mirabilis is a carnivorous herb that inhabits wet, open places on rocky areas in the Study Area. 

The shrubland at the northern and western parts were largely untouched and the floristic diversity and structural complexity were medium.  The floristic diversity and structural complexity of the shrubland at the southern part was low to moderate.

Shrubland is one of the most extensive vegetation types, other than grassland and secondary forest, in Hong Kong ([40]).  Shrubland is the dominant habitat within the Study Area, as well as other selected areas in the vicinity (Table 2b of Annex 8).  The domination by shrubland habitats is due to the harsh environmental conditions such as limited water supply, low water retention capability of the soil, exposure to strong sunlight and exposure to strong winds. 

The plant species recorded in the shrubland of Black Point are commonly found elsewhere on Hong Kong hillsides.  Shrubland habitats in all selected areas were dominated by native shrubs but the floristic diversity and structural complexity of the habitats is influenced by the extent of human disturbance.  In conclusion, the ecological importance of shrubland in Black Point is low to moderate (southern part) or moderate (northern and western parts).

Shrubby Grassland

Shrubby grassland refers to the intermediate form of pure grassland and shrubland with grass species comprising over 60% of the vegetation cover with the remainder comprising scattered shrubs ([41]).  Shrubby grassland was found covering the ridges of the headland, in the gulley and sheltered areas.  Barren rocks were found within the shrubby grassland due to the extensive erosion of the existing granitic rocks.  The thin topsoil has resulted from extensive soil erosion and this has restricted the establishment of tall shrub community on the ridges of the headland.  Evidence of hill fires was found at the shrubby grassland during the site visits.  Photographic records of the shrubby grassland within the Study Area are shown in Figure 8.8. 

The dominant plant species included several grasses such as Ischaemum aristatum, Digitaria sanquinalis and Rhynchelytrum repens growing to a height of 0.5 to 1.5 meters.  Shrub species were scarcely found within this habitat.  Twenty five plant species were found in shrubby grassland and neither rare nor protected plant species were recorded.  The floristic diversity and structural complexity of the shrubby grassland were low.

Shrubby grassland or shrubland and grassland mosaic were common in most of the coastal areas of North Lantau/West New Territories (Dudgeon and Corelett 2004) ([42]).  The plant species composition of the habitat is simple with limited number of species recorded, i.e., 25 plant species in Black Point, 33 plant species in Siu Ho Wan and 90 plant species in North Lantau.  Natural erosion and occurrence of hill fires restricts the further colonisation of shrub species. 

Shrubby grassland habitat in Hong Kong is generally regarded as low quality habitat with relatively low floristic diversity and structural complexity.  The ecological importance of shrubby grassland at Black Point is therefore considered to be low.

Stream/Channel

A natural seasonal stream and two stormwater drainage channels were found within the Study Area.  Photographic records of the streams and channels are shown in Figure 8.9.  The natural seasonal stream was located at the north of the headland running from the middle of the hill towards the power station.  A concrete channel was constructed in between the Black Point Power Station and the headland running from Yung Long Road to the sea.  Another short channel was located at the southeast of the headland running from the plantation to the barging point and fabrication yard for Shenzhen Western Corridor Project.  The riparian vegetation of the natural seasonal stream was integrated with the surrounding shrubland with semi-open canopy, while the plant community of the channels mainly consisted of exotics. 

A total of 18 plant species were found along the stream/channel habitat and no rare/protected species were recorded.  The substratum of the natural seasonal stream was rocky and limited water flow was recorded during the surveys.  Both of the channels were cemented and artificial.  The channel in between the power station and headland had limited water flow and the section next to the sea was brackish in nature due to tidal intrusion.  The channel in the plantation was dry during the site visits. 

A protected snake species, the Burmese Python Python molurus was found in the drainage channel next to the Black Point Power Station during the additional ecological survey.  The location of Burmese Python is shown in Figure 8.7.  The floristic diversity and structural complexity of the natural stream are low while those for the channels were negligible.

Permanent natural stream habitat is not present at Black Point because of the steep terrain of the headland.  The seasonal stream at Black Point was of a much smaller scale compared with the permanent streams in other areas in the vicinity which show a higher abundance and diversity of aquatic fauna (Table 2d of Annex 8).  Other than the Lesser Spiny Frog (only one individual recorded during the surveys), which is a recognized species of conservation interest, no aquatic fauna were found in the stream, which indicated low to moderate ecological importance of the seasonal stream found at Black Point. 

Orchard

An orchard lies within the Study Area located next to the barging point and fabrication yard for Shenzhen Western Corridor Project at the southern fringe of the headland.  It is fenced and under active management.  The orchard was dominated by Dimocarpus longan and Litchi chinensis.  The fruit trees were in good condition and the understorey was well maintained without any vegetation.  Photographic records of the orchard are shown in Figure 8.10.  Six plant species were recorded in this habitat and no rare/protected species were found.  The orchard within the Study Area was highly modified and was of low floristic importance. 

The orchard is a man made habitat for the cultivation of fruit.  The orchards in other areas in the vicinity of Black Point and on North Lantau were also low in floristic diversity and structural complexity (Table 2e of Annex 8).  In conclusion, the ecological importance of orchard at Black Point was low.

Developed Area

The developed area was the second largest habitat within the Study Area.  This habitat type consisted mainly of the power station, a barging point and fabrication yard for Shenzhen Western Corridor Project, car parks, wasteland and roads.  Photographic records of the developed area are shown in Figure 8.11.  Over 90% of the vegetation recorded within this habitat type was planted for landscaping purposes and was dominated by Melaleuca leucadendron, Schefflera octophylla, Duranta repens, Cassia surattensis and Bauhinia blackeana.  Similar to other developed areas in the vicinity, this habitat was highly developed with limited ecological significance and only seven plant species were found in this habitat, without any rare or protected species recorded (Table 2f of Annex 8).  

Due to the disturbed nature of the habitat and lack of rare or protected species, the ecological importance of the developed area at Black Point is negligible.

Wildlife

Birds

There were a total of 51 species of birds recorded within the Study Area during the surveys.  Twelve species were recorded only during the dry season and 17 recorded only during the wet season, and 22 species were recorded in both seasons.  Thirty one species were recorded at the sampling points during point count surveys and an additional 22 species were recorded outside of the sampling points but within the Study Area (Tables 3 and 4 of Annex 8). 

The details of the point count bird data are shown in Table 4 of Annex 8.  Relative abundance and species richness in each type of surveyed habitat, based on the results of the point count method, are presented in Table 8.4.  The highest mean number of individuals of birds was recorded in orchard, shrubby grassland and shrubland.  Plantation recorded the highest total number of bird species.

Table 8.4          Abundance and Species Richness of Birds Within the Study Area during the Point Count Surveys

 

Season

P

S

SG

ST

OR

D

Total

Number of sampling points covered an area of ~ 0.28 ha)

 

4

4

4

4

2

2

20

Number of survey days

Dry

4

4

4

4

4

4

4

 

Wet

4

4

4

4

4

4

4

 

overall

8

8

8

8

8

8

8

Total number of individuals

Dry

23

44

35

22

12

13

149

Wet

35

33

49

37

29

8

191

Overall

58

77

84

59

41

21

340

Mean abundance (birds per hectare per survey day)

Dry

5.10

9.75

7.76

4.88

5.32

5.76

6.60

Wet

7.76

7.31

10.86

8.20

12.85

3.55

8.46

Overall

6.41

8.51

9.29

6.52

4.53

4.64

7.52

Total number of species

Dry

7

8

7

7

8

5

24

Wet

14

6

8

10

7

4

22

Overall

17

9

9

13

12

7

31

Species Richness (mean no. of species per sampling point)

Dry

0.44

0.50

0.44

0.44

1.00

0.63

0.53

Wet

0.88

0.38

0.50

0.63

0.88

0.50

0.49

Overall

1.06

0.56

0.56

0.81

1.50

0.88

0.69

Habitat: P = plantation; S = shrubland, SG = Shrubby grassland, ST = stream/channel, OR = orchard, D = developed area.

Avifauna recorded at Black Point during the surveys showed a limited degree of seasonal variation.  Abundance and species richness in the dry season were generally higher than the wet season for developed area and shrubland, while abundance and species richness in the wet season were generally higher for orchard, plantation, stream/channel and shrubby grassland.  For total species richness, there were 24 species recorded in the dry season and 22 species in the wet season.

Species recorded in the dry season were mainly residents and winter visitors, with a few passage migrants.  Species recorded in the wet season were residents with summer visitors, passage migrants and a few winter visitors.  However, some of the residents were only recorded in the wet season.  Since the wet season covered the breeding periods of many species, the calls of some residents such as Chinese Francolin and Common Koel increased their detectabilities.  Among the recorded species, there were 34 residents, six passage migrants, four summer visitors and 16 winter visitors (Table 3 of Annex 8).    

 

Most of the bird species recorded are common and widespread in Hong Kong (such as Chinese Bulbul Pycnonotus sinensis), and generally of low conservation importance (e.g., Crested Myna Acridotheres cristatellus).  Among the bird species recorded within the Study Area, there were three species of conservation interest; Black Kite Milvus lineatus, White-bellied Sea Eagle Haliaeetus leucogaster and Greater Coucal Centropus sinensis.  The locations of the recorded species of conservation interest, except the Black Kite, are shown on Figure 8.7.

The Black Kite is a very widespread and common species in Hong Kong and its distribution pattern and density is presented in Figure 1 of Annex 8.  It is conspicuous in the urban area and over Victoria Harbour all year around.  It is more numerous in winter than in summer and the number peaks in December and January ([43]).  Black Kites are found in a wide variety of coastal and inland habitats, including small islands, sea-coasts, intertidal mudflat, fish ponds, reservoirs, landfills and grassy hillsides at all altitudes.  The Black Kite is protected in China and listed as a Class 2 Protected Animal of PRC and in Appendix 2 of CITES.  Black Kites were only recorded soaring during the surveys.  The exact locations of the bird cannot therefore be shown in Figure 8.7.  Black Kites usually forage over a large area and Black Point is considered to be a part of their foraging area.

The Greater Coucal is a Class 2 Protected Animal in the PRC ([44]).  However, it occupies many types of habitats in Hong Kong (Carey et al 2001), and is a common resident.  It is frequently found in grasslands, mangroves, marshes, agricultural lands with scattered trees and bushes, open canopy shrubland, fung shui woods and gardens, and has been noted foraging in refuse.  The distribution pattern and density of Greater Coucal in the Hong Kong SAR is presented in Figure 1 of Annex 8.  It was found perching in the shrubby grassland, shrubland and the stream during the surveys.

The White-bellied Sea Eagle is resident in Guangdong and southern Fujian and occasionally occurs in Jiangsu and Hainan.  It is an uncommon resident in Hong Kong in coastal areas and offshore islands, and is listed as a rare species in the China Red Data Book, Class II protected species in PRC and CITES Appendix II.  White-bellied Sea Eagles are mostly found in rocky coastlines but are also seen over reservoirs and hills close to the sea.  The most recent comprehensive studies undertaken by AFCD (Tsim et al 2003) ([45]) reported that there were eight breeding sites (Pa Tau Kwu in Lantau Island, Green Island and Wong Ma Kok in Hong Kong Island, Stonecutters Island in Kowloon, Yeung Chau, Tai Ngam Hau, Tsim Chau and Sham Chung in Sai Kung), recorded in Hong Kong (Figure 2 of Annex 8).  One immature White-bellied Sea-eagle was observed flying above the radar station located on top of the headland during the survey. 

Juveniles of four bird species were recorded within the Study Area (Table 8.5):   White Wagtail, Red-whiskered Bulbul, Chinese Bulbul and Oriental Magpie Robin.  All are common and widespread bird species in Hong Kong.   

Table 8.5          Juvenile Bird Species Recorded Within the Study Area

Common Name

Habitat Type Recorded

Observation

White Wagtail

Channel

Juveniles recorded

Red-whiskered Bulbul

Plantation and stream

Juveniles recorded

Chinese Bulbul

Stream, shrubby grassland and shrubland

Juveniles recorded

Oriental Magpie Robin

Channel

Juveniles recorded

Overall, the species diversity of birds at Black Point is moderate, when considering survey effort (including the number of survey days and the duration of the survey period) and the size of the surveyed areas, compared with other areas in the vicinity and north Lantau (Table 5 of Annex 8).

Invertebrates

Butterflies

A total of 37 species of butterfly were recorded in different habitats at Black Point between February and July 2004 including both dry and wet seasons (Tables 6a 6c of Annex 8) during the point count survey.  One additional species, Great Orange Tip Hebomoia glaucippe, was recorded between sampling transects and points within the Study Area.  Two uncommon (Yellow Pansy Junonia hierta, and Tailed Sulphur Dercas verhuelli) and two rare species (Spotted Sawtooth Prioneris thestylis and Red Lacewing Cethosia biblis) were recorded.  Food plants of these species are listed in Table 8.6.  The locations of these species are shown in Figure 8.7.

Table8.6                   Butterfly Species of Conservation Concern at Black Point

Common Name

Species Name

Food Plant

Habitat Found

Yellow Pansy

Junonia hierta

Barleria cristata

Shrubby grassland

Tailed Sulphur

Dercas verhuelli

Dalbergia benthami

Shrubby grassland

Spotted Sawtooth

Prioneris thestylis

Species of Capparaceae

plantation

Red Lacewing

Cethosia biblis

Passiflora cochinchinensis

Shrubland

The Yellow Pansy prefers dry and open vegetated areas ([46]), and is usually found near their larval food plant the Philippine Violet Barleria cristata ([47]), and has been recorded in Lung Kwu Tan, Wong Lung Hang, Peng Chau, Mount Davis and Kadoorie Farm.  The Yellow Pansy was found in the shrubby grassland during the survey.

The Tailed Sulphur inhabits woodland and well-vegetated areas ([48]) and has been recorded in Tai Po Kau, Hok Tau, Shing Mun Reservoir, Fung Yuen and Sam A Tsuen.  The Tailed Sulphur was found in shrubby grassland within the Study Area.

Due to the rarity and slow growth rate of their larval food plant the King Snake Creeper Passiflora cochinchinensis, the Red Lacewing is rare in Hong Kong ([49]).  The biggest and most stable population of this species is found at Lung Kwu Tan, San Tau, Mount Nicholson, Tong Fuk and Pui O ([50]).  It was found in shrubland during the survey.

The Spotted Sawtooth is usually found in wooded areas ([51]) and has been recorded in Tai Po Kau, Kwun Yam Shan, Shan Liu, Ngau Ngak Shan and Cheung Chau.  It was found in the plantation during the survey.

Butterfly abundance in shrubland was considered low to medium, and low in other habitats (Table 8.7).  The Species richness of butterfly was considered medium in shrubby grassland and low in other types of habitats.  The generally low butterfly abundance and species richness in the whole of the Black Point Study Area was related to the disturbed nature of the habitats (e.g., hill-fires).

Table 8.7        Mean Abundance of Butterfly Recorded at Black Point during the Transect/ Point Count Surveys

 

Season

Plantation

Shrubland

Shrubby Grassland

Orchard

Stream/

Channel

Total

No. of individual per hectare

Dry

2.0

12.1

1.6

6.8

0

22.5

Wet

8.8

35.5

11.7

11.3

0

67.3

No. of species

Dry

5

7

8

3

0

16

Wet

16

14

24

8

0

31

No. of uncommon/rare species

Dry

0

0

1

0

0

1

Wet

1

1

2

0

0

4

Overall

1

1

2

0

0

4

Both abundance and species richness of butterflies at Black Point were higher in the wet season (Table 8.7).  Abundance was three times higher in the wet season than in the dry season.  The number of species of butterfly recorded during the wet and dry seasons surveys was 31 and 16 respectively (Tables 6a and 6b of Annex 8). 

The number of butterfly species in Black Point was moderate when compared with other areas in consideration of the survey efforts (including the number of survey days and the duration of survey period) (Table 7 of Annex 8).  The presence of stream habitats and woodland, which do not feature strongly at Black Point, would sustain more butterfly species by providing suitable habitat. 

Dragonfly

Five species of dragonfly were recorded in different habitats at Black Point between February and July 2004 (Tables 8a and 8b of Annex 8).  The diversity of dragonflies in the Study Area at Black Point was low, due to the lack of natural aquatic habitats.  All recorded species are common and widespread in Hong Kong (Wilson 2004) ([52]).  The mean abundance and richness of dragonflies recorded within the Study Area are shown in Table 8.8.

Table 8.8        Mean Abundance of Dragonflies Recorded at Black Point

 

Season

Plantation

Orchard

Shrubland

Shrubby Grassland

Stream/

Channel

Total

No. of individual/ha

Dry

0

1.1

0.9

0

0

2

Wet

0.2

0

0

2.0

0.8

3

No. of species

Dry

 

0

1

1

0

0

2

Wet

1

0

0

2

2

4

Both abundance and species richness of dragonflies in Black Point were higher in the wet season (Table 8.8).  Dragonfly abundance and species richness in all sampled habitats in the Study Area was considered very low.

The species diversity of dragonfly at Black Point and the other selected areas is considered to be low (Table 9 of Annex 8). 

Herpetofauna

The diversity of amphibians in the Study Area at Black Point was low, due to the lack of natural aquatic habitats.  Amphibian species recorded included the Asian Common Toad Bufo melanostictus, Gunther’s Frog Rana guentheri and Lesser Spiny Frog Rana exilispinosa.  The Asian Common Toad and Gunther’s Frog are common and widespread in Hong Kong ([53]).  The Lesser Spiny Frog is the most common hill stream frog in Hong Kong but is considered threatened in China due to a decline in populations of the species throughout its range (Hunan, Fujian and Guangdong) ([54]).  A Lesser Spiny Frog was found at the seasonal stream during the site visit.  It is most frequently seen perching on rocks, beside swift-flowing water or under ledges, as well as by quiet pools.  Another species of reptile recorded was the Changeable Lizard Calotes versicolor.  This species can be found in many types of habitats, and is common and widespread in Hong Kong ([55]). 

A protected snake species the Burmese Python Python molurus was recorded within the drainage channel next to the Black Point power station during the additional ecological survey.  The Burmese Python can be found in a variety of habitats, preferring well-developed shrubland, woodland and edges of mangrove swamps.  It is widely distributed in the territory, including all major islands ([56]).  The locations of the Burmese Python and Lesser Spiny Frog are as shown in Figure 8.7. 

The species diversity of herpetofauna at Black Point, other areas in the vicinity and north Lantau is considered low, taking into account the survey effort (including the number of survey days and duration of survey period) and the size of surveyed areas (Table 10 of Annex 8). 

Mammal

Two species of mammal were recorded, a bat, the Japanese Pipistrelle Pipistrellus abramus and the Feral Dog Canis familiaris.  The Japanese Pipistrelle was observed flying around the lamps inside the power station.  Protected by the Wild Animals Protection Ordinance, it is widespread and common in Hong Kong ([57]).  The location of Japanese Pipistrelle recorded in the Study Area is shown in Figure 8.7.  Feral Dogs were found in the shrubland near to the power station, which was considered to have no conservation significance.

The lack of large mammal species at Black Point, is probably due to the poor quality of the habitats and the extent of human disturbance in the area. 

Aquatic Fauna

The seasonal stream was surveyed once in both the wet and dry seasons and only limited water flow in between the boulders was recorded.  Other than the Lesser Spiny Frog, no freshwater fish or other stream macro-fauna were recorded.  The channel near to the power station has limited water flow and a protected snake species, the Burmese Python Python molurus, was recorded in the channel during the additional ecological survey.

Current Condition of the Proposed Project Area

The terrestrial habitats recorded in the Project Area were mainly shrubland (approximately 12.6 ha), with small patches of shrubby grassland (approximately 2.4 ha), drainage channel (approximately 940 m) and developed area (approximately 1.4 ha).  The area within the Project Area that would be directly affected by the development comprises 4.9 ha of shrubland, 1 ha of developed area and 135 m of drainage channel (Figure 8.12).  The remaining area within the Project Area would remain untouched.

The continuous patch of shrubland at the northern and western parts of the Study Area was densely vegetated with native shrubs and climbers.  The vegetation was well developed and the canopy species reached a height of 2 to 3 metres.  Shrubland was dominated by native plant species including Celtis sinensis, Aporusa dioica, Cassytha filiformis, Gordonia axillaries, Litsea rotundifolia, Sterculia lanceolata and Caesalpinia vernalis.  Two locally protected plant species, the Pitcher Plant and the Bamboo Orchid, were recorded at the northwest part of the shrubland (Figure 8.7).  The shrubland was largely undisturbed and the floristic diversity and structural complexity were medium.  The ecological importance of shrubland was considered to be moderate. 

8.5                                      Evaluation of the Ecological Importance of the Study Area

In this section the ecological importance of the terrestrial habitats and wildlife identified within the Study Area are evaluated in accordance with the EIAO TM Annex 8 criteria.

·       Naturalness;

·       Size;

·       Diversity;

·       Rarity;

·       Re-creatability;

·       Ecological Linkage;

·       Potential value;

·       Nursery Ground;

·       Age; and,

·       Abundance.

The evaluation is based upon the field survey information presented in Section 8.4.3 and the literature review presented in Section 8.4.2. 

8.5.1                                Habitats

The ecological importance of each habitat type within the Study Area is presented in Tables 8.9 – 8.14. 

Plantation

The exotic plantation was found along the fringe of the headland.  The dominant species were several exotic plant species, while the undergrowth was occupied by native shrubs and tall grasses.  The floristic diversity and structural complexity of the plantation at Black Point were low.  In conclusion, the ecological importance of plantation at Black Point is low.

Table 8.9        Ecological Evaluation of Plantation

Criteria

Plantation

Naturalness

Man-made, dominated by a few exotic trees.

Size

The overall size was approximately 2.9 ha, the plantations were scattered within the Study Area as a thin strip beside the headland.

Diversity

Low diversity of plant (18 species) and structural complexity.  Low in faunal diversity.

Rarity

Rare butterfly species Spotted Sawtooth was recorded.

Re-creatability

Readily recreatable.

Fragmentation

Fragmented. 

Ecological Linkage

Not linked to any ecologically significant area.

Potential Value

Low with exotic plant species.

Nursery/Breeding Ground

No significant nursery or breeding ground recorded during the survey.

Age

Young (10 years old) based on tree size, structure and species composition.

Abundance/Richness of Wildlife

Low for avifauna, butterfly and dragonfly.

Overall Ecological Importance

Low

Shrubland

Shrubland was the dominant habitat at Black Point.  The shrublands recorded at the northern and western parts of the headland have higher floristic diversity and structural complexity than those of the shrubland in the southern part.  All of the recorded plant species are common or very common in Hong Kong except two locally protected plant species Pitcher Plant and Bamboo Orchid, which were both recorded in the western part of the shrubland.  The floristic diversity and the structural complexity of shrubland in the northern and western parts are moderate while those of the shrubland in the southern part were low to moderate.  In conclusion, the ecological importance of shrubland in Black Point is low to moderate or moderate.


Table 8.10      Ecological Evaluation of Shrubland

Criteria

Shrubland at Northern and Western Parts

Shrubland at Southern Part

Naturalness

Secondary, semi-natural.

Secondary, semi-natural.

Size

The overall size was approximately 35 ha, the shrubland was a large patch within the Study Area and mainly located at steep terrains and valleys located at the northern and western part of the headland.

The overall size was approximately 11.6 ha, the shrubland was located at the southern part of the headland.

Diversity

Medium diversity of plant (70 species), moderate structural complexity.  Low to moderate for faunal diversity.

Medium diversity of plant (< 70 species), low to moderate structural complexity.  Low to moderate for faunal diversity.

Rarity

Locally protected plant species Bamboo Orchid and Pitcher Plant were recorded.  Faunal species of conservation interest included butterfly species Red Lacewing and bird species Greater Coucal.

Nil.

Re-creatability

Habitat characteristics and species composition are not easy to create.  It will take approximately 10- 20 years for the shrubland to be re-created to its existing status.

Habitat characteristics are not easy to recreate.  It will take approximately 10 years for the shrubland to be re-created.

Fragmentation

Not fragmented. 

Not fragmented. 

Ecological Linkage

Not linked to any ecologically significant areas.

Not linked to any ecologically significant areas.

Potential Value

Moderate, may not be able to develop as woodland as limited by strong wind, soil erosion and limited water storage capacity of soil in this coastal area.

Low to moderate, may not be able to develop as woodland as limited by strong wind, soil erosion and limited water storage capacity of soil in this coastal area.

Nursery/Breeding Ground

No significant nursery or breeding ground recorded during the survey.

No significant nursery or breeding ground recorded during the survey.

Age

Young (around 20 years) based on tree size, structure and species composition.

Young (less than 20 years) based on tree size, structure and species composition.

Abundance/Richness of Wildlife

Low to moderate for avifauna and butterfly, low for dragonfly and other wildlife.

Low to moderate for avifauna and butterfly, low for dragonfly and other wildlife.

Overall Ecological Value

Moderate

Low to moderate

 


Shrubby Grassland

 

Shrubby grassland in Hong Kong is generally regarded as a low quality habitat with relatively low floristic diversity and structural complexity.  Shrubby grassland was found along the ridges of the headland and appeared to have experienced frequent fires and soil erosion.  All of the plant species are common or very common in Hong Kong.  The floristic diversity and the structural complexity of the shrubby grassland are low.  The ecological importance of shrubby grassland at Black Point is, therefore, considered to be low.

Table 8.11      Ecological Evaluation of Shrubby Grassland

Criteria

Shrubby Grassland

Naturalness

Semi-natured and disturbed by hill fire and natural erosion.

Size

The overall size was approximately 18.2 ha, large patch located in the middle of the Study Area.

Diversity

Low diversity of plant (25 species) and structural complexity.  Low in faunal diversity.

Rarity

Bird species of conservation interest included Black-eared Kite and Greater Coucal.  Two uncommon butterfly species, the Tailed Sulphur and Yellow Pansy were recorded.

Re-creatability

Easy to recreate.

Fragmentation

Not fragmented.

Ecological Linkage

Not linked to any identified ecologically significant area.

Potential Value

Low, may not be able to develop as shrubland as limited by frequent hill fires and limited water storage capacity of soil in this coastal area.

Nursery/Breeding Ground

No significant nursery or breeding ground recorded during the survey.

Age

Young (less than 5 years) based on tree size, structure and species composition.

Abundance/Richness of Wildlife

Low.

Overall Ecological Importance

Low

Natural Seasonal Stream and Drainage Channel

The natural seasonal stream at Black Point was found within the shrubland opposite to the Black Point Power Station.  The riparian vegetation community of the stream was integrated with the surrounding shrubland.  The substratum of the stream was rocky but with very limited water flow even during the wet season.  An amphibian species of conservation interest, the Lesser Spiny Frog, was found in the stream during the survey. 

The drainage channels had very limited water flow and a protected snake species Burmese Python Python molurus was recorded during the additional ecological survey.  In conclusion, the ecological importance of the stream at Black Point is low to moderate and the ecological importance of the channels at Black Point is negligible.

Table 8.12        Ecological Evaluation of Stream/Channel

Criteria

Seasonal Stream

Channels

Naturalness

Natural.

Man-made and highly disturbed.

Size

The total length was approximately 60 m. 

The total length was approximately 8.2 km. 

Diversity

Low for plant and fauna.

Low for plants and fauna.

Rarity

Species of conservation interest include Greater Coucal and Lesser Spiny Frog were recorded.

A protected snake species Burmese Python Python molurus was recorded.

Re-creatability

Stream habitats can be re-created with proper design, such as Tung Chung River.  Recreated stream habitats can serve similar ecological function as natural stream but it may take time for the recolonisation of stream fauna.

Readily re-creatable.

Fragmentation

Not applicable.

Not applicable.

Ecological linkage

Not functionally linked to any highly valued habitat in close proximity.

Not functionally linked to any highly valued habitat in close proximity.

Potential value

Low due to the short length and limited water flow.

Low ecological potential.

Nursery/breeding ground

No significant nursery or breeding ground recorded.

No significant nursery or breeding ground recorded.

Age

Not applicable.

Not applicable.

Abundance/

Richness of wildlife

Low.

Low.

Overall Ecological Importance

Low to Moderate

Negligible

Orchard

An orchard under active management was found at the southern fringe of the headland and consisted mainly of fruit plants including Lychee and Longan.  The understorey was bare and the floristic diversity and structural complexity of the orchard were low.  In conclusion, the ecological value of the orchard was low.


Table 8.13      Ecological Evaluation of Orchard

Criteria

Orchard

Naturalness

Man-made habitat with active management.

Size

The overall size was approximately 1.4 ha.

Diversity

Low for vegetation (total of nine species for the whole area all fruit plants), moderate for bird and low for butterfly, dragonfly and herpetofauna.

Rarity

None recorded.

Re-creatability

Readily re-creatable.

Fragmentation

Not fragmented.

Ecological Linkage

Not functionally linked to any highly valued habitat in close proximity. 

Potential Value

Low.

Nursery/Breeding Ground

No significant nursery or breeding ground recorded. 

Age

Not applicable.

Abundance/Richness of Wildlife

Low. 

Overall Ecological Importance

Low

Developed Area

The developed area included the power station, barging point and fabrication yard for Shenzhen Western Corridor Project, car parks, wasteland, radar station and helipad.  All of the recorded plant species are common or very common in Hong Kong.  The floristic diversity and the structural complexity of developed area were low.  In conclusion, the ecological importance of the disturbed area in Black Point is negligible.

Table 8.14      Ecological Evaluation of Developed Areas

Criteria

Developed Areas

Naturalness

Man-made habitat, consisted of power station, barging point and fabrication yard for Shenzhen Western Corridor Project, helipad, radar station, car parks and roads.

Size

The overall size was approximately 43.5 ha. 

Diversity

Low.

Rarity

Protected mammal Japanese Pipistrelle was recorded.

Re-creatability

Readily re-creatable.

Fragmentation

Not fragmented

Ecological Linkage

Not functionally linked to any highly valued habitat in close proximity.

Potential Value

Low.

Nursery/Breeding Ground

None. 

Age

Not applicable.

Abundance/Richness of Wildlife

Low.

Overall Ecological Importance

Negligible

Project Area

The ecological importance of the Project Area is evaluated in accordance with the EIAO-TM Annex 8 criteria (Table 8.15).

The Project Area was approximately 16.4 ha comprising of shrubland (12.6 ha), shrubby grassland (2.4 ha), developed area (1.4 ha) and drainage channel (940 m).  The habitat was moderate for vegetation and low for fauna.  Two locally protected but common floral species including Pitcher Plant and Bamboo Orchid were recorded within the Project Area whilst none of the fauna species of conservation interest were recorded within the Project Area.  In conclusion, the ecological importance of the Project Area is generally low to moderate.

Table 8.15      Ecological Evaluation of Project Area (a)

Criteria

Project Area

Naturalness

Disturbed in part, i.e., construction of radar station and helipad within shrubby grassland.

Size

Total: 16.4 ha.  Approximately 12.6 ha of shrubland, 2.4 ha of shrubby grassland, 940 m long drainage channel and 1.4 ha of developed area recorded within the Project Area.

Diversity

Moderate for vegetation and low for fauna.

Rarity

Two locally protected but common floral species including Pitcher Plant and Bamboo Orchid.  No fauna species of conservation interest were recorded within the Project Area.

Re-creatability

Shrubland and shrubby grassland are re-creatable but would take time (i.e., 10 to 20 years) to reach maturity.  Developed areas and drainage channels are readily recreatable.

Fragmentation

Not applicable.

Ecological Linkage

Not functionally linked to any highly valued habitat in close proximity.

Potential Value

Moderate.

Nursery/Breeding Ground

No significant breeding ground recorded.

Age

Young.

Abundance/Richness of Wildlife

Abundance of fauna was low. 

Overall Ecological Importance

Moderate for Shrubland

Low for Shrubby Grassland

Negligible for Developed Area

Negligible for Drainage Channel

Note: (a) - Areas stated are approximate and based on the layout prepared for the EIA which precedes the detailed engineering design. 

8.5.2                                Flora and Fauna of Ecological Interest

There were a number of floral and faunal species of conservation interest recorded within the Study Area during the surveys:

·      Two locally protected plant species, i.e., Pitcher Plant Nepenthes mirabilis and Bamboo Orchid Arundina graminifolia, were recorded in shrubland at the west of the headland. 

·      Three bird species of conservation interest, the Black Kite, White-bellied Sea Eagle and Greater Coucal, were recorded within the Study Area.  The White-bellied Sea Eagle was flying past the shrubby grassland at a height of about 30 meters above the ground, Black Kites were soaring around the headland and the Greater Coucal were perching in the shrubby grassland during the site visits.  None of these bird species were sighted within habitats that would be directly affected by the Project.

·      Two uncommon (Yellow Pansy and Tailed Sulphur) and two rare (Spotted Sawtooth and Red Lacewing) butterfly species were recorded within the Study Area.  Yellow Pansy and Tailed Sulphur were found in the shrubby grassland, Red Lacewing was found in the shrubland and Spotted Sawtooth was found in the plantation.  None of these butterfly species were sighted within habitats to be directly affected by the Project.

·      A Lesser Spiny Frog was found in the seasonal stream, which is a habitat that would not be directly affected by the Project.  A protected snake species Burmese Python Python molurus was recorded in the drainage channel next to the power station area.

·      A Japanese Pipistrelle, the most common bat species in Hong Kong, was recorded within the power station area.

The list and evaluation of the floral and faunal species of ecological interest recorded within the Study Area, according to the EIAO TM, are given in Table 8.16.


Table 8.16      Evaluation of Floral and Faunal Species with Ecological Interest within the Study Area

Species Name

Location

Protection Status

Distribution

Rarity in Hong Kong

Plant

 

 

 

 

Pitcher Plant Nepenthes mirabilis

Shrubland at the west of the headland

Forests and Countryside Ordinance (Cap 96); Appendix 2 of CITES

North Lantau and New Territories.

Common

Bamboo Orchid Arundina graminifolia,

Shrubland at the west of the headland

Forests and Countryside Ordinance (Cap 96)

Grassland and streamside of various locations in Hong Kong

Common

Bird

 

 

 

 

Black Kite Milvus lineatus

In various habitats of the Study Area;

soaring

Wild Animals Protection Ordinance (Cap 170); Class 2 Protected Animal of PRC;

Appendix 2 of CITES

Found in many types of habitat;

 

Common and widespread in Hong Kong

White-bellied Sea Eagle

Haliaeetus leucogaster

Above shrubland;

flying passed

Wild Animals Protection Ordinance (Cap 170); Class 2 Protected Animal of PRC;

Appendix 2 of CITES

Found in coastal habitats and reservoirs in Hong Kong

Uncommon in Hong Kong

Greater Coucal Centropus sinensis

In various habitats of the Study Area; perching

Wild Animals Protection Ordinance (Cap 170); Class 2 Protected Animal of PRC

Found in many types of habitats in Hong Kong

 

Common and widespread in Hong Kong;

Very rare in China

Butterfly

 

 

 

 

Yellow Pansy Junonia hierta

Shrubby grassland

Not protected

Not widespread, found in a few scattered localities

Uncommon in Hong Kong

Tailed Sulphur Dercas verhuelli

Shrubby grassland

Not protected

Fairly widespread

Uncommon in Hong Kong

Spotted Sawtooth Prioneris thestylis

Plantation

Not protected

Not widespread

Rare in Hong Kong, considered of local concern

Red Lacewing Cethosia biblis

Shrubland

Not protected

Not widespread

Rare in Hong Kong

Herpetofauna

 

 

 

 

Lesser Spiny Frog Rana exilispinosa

Natural seasonal stream

Not protected

Widespread in swift-flowing hill and mountain streams, particularly those with cascading water

Fairly common in Hong Kong, considered potential global concern

Burmese Python Python molurus

Channel

Wild Animals Protection Ordinance (Cap 170), Appendix 2 of CITES and Class 1 Protected Animal of PRC

Found in many types of habitats in Hong Kong

 

Rare in Hong Kong, considered of local concern

Mammal

 

 

 

 

Japanese Pipistrelle Pipistrellus abramus

Developed area

Wild Animals Protection Ordinance (Cap 170)

Widespread

Common in Hong Kong


8.6                                       Terrestrial Ecological Assessment

8.6.1                                Assessment Methodology

The importance of potentially impacted ecological resources identified within the Study Area was assessed using the approach specified in the EIAO-TM.  The potential impacts due to the construction and operation of the proposed LNG terminal were then assessed (following the EIAO-TM Annex 16 guidelines) and the impacts evaluated (based on the criteria in EIAO-TM Annex 8). 

8.6.2                                Potential Sources of Impact

The directly affected land area of the LNG terminal, covers the western tip of the headland, is approximately 5.9 ha (impacts to rocky shore is excluded which shall be discussed in detail in Part 3 Section 9 Marine Section).  The boundary of the Project Area (landside) perimeter will be secured during construction and operation of the terminal for safety and security reasons.  The land take is mainly restricted to the shrubland along the coast and most of the upland habitats within the Project Area will not be disturbed.  The Project involves excavation and construction of the LNG terminal platform and accommodation of the LNG storage tanks and associated facilities.  Potential ecological impacts that may arise during the construction operational phases are detailed below.

Construction Phase

·           Direct habitat and vegetation loss and habitat fragmentation resulting from land take for the construction activities for the LNG terminal and associated facilities;

·           Direct habitat and vegetation loss resulting from land take for the construction of a temporary haul road at the fringe of the shrubland, to allow heavy machinery to be mobilised and transported for the slope stabilization works;

·           Direct loss of inactive/less mobile/habitat-specific wildlife nesting/inhabiting the affected area;

·           Associated potential impacts to wildlife, including restriction of wildlife utilisation (i.e., transit, feeding and roosting), degradation of habitat quality/ ecological function, as a result of temporary and permanent loss, isolation and fragmentation of ecological habitat, and fencing around the Project Area; and,

·           Potential impacts to the surrounding habitat and associated wildlife due to physical disturbance of this habitat including noise, blasting, increased human activity or hill fire.

Operational Phase

·           Potential impacts to the surrounding natural habitat (mainly the hill at Black Point) and associated wildlife due to increased human activity and disturbance (i.e., noise and light) associated with the operation of the LNG terminal;

·           Potential impacts to wildlife, in particular avifauna, during operation of the LNG terminal at Black Point due to the increase in noise, air pollution, lighting, glare and physical barriers; and,

·           Potential impacts to the surrounding natural habitat (mainly the hill at Black Point) and associated wildlife due to an accidental fire caused by a LNG spill.

8.6.3                                Assessment of Ecological Impacts

Approximately 5.9 ha of the land area within the Project Area will be directly affected (Figure 8.12).  The land works including site clearance, excavation and blasting are expected to be completed in 18 months.  The major impacts on the terrestrial ecological resources will be direct habitat and vegetation loss.

Construction Phase

The potential impacts during the construction phase will be:

Habitat Loss

·           Permanent loss (approximately 4.2 ha) and temporary loss (approximately 0.7 ha) of shrubland due to the construction of the tanks of the LNG terminal including a temporary haul road and slope stabilization (refer to Figure 8.12);  

·           Permanent loss of developed area (approximately 1 ha) due to the construction of the administrative buildings (refer to Figure 8.12);

·           Permanent loss of a length of drainage channel (approximately 135 m) due to the construction of the LNG terminal platform (refer to Figure 8.12);

·           Relocation and potential loss of floral species (Pitcher Plant and Bamboo Orchid) of conservation interest; and,

·           Potential loss of foraging and feeding areas for the associated wildlife.  None of the faunal species of conservation interest were recorded as inhabiting the area to be directly affected by the works.

Habitat fragmentation and Isolation

Habitat fragmentation and isolation are not expected as the affected habitats are located at the western end of the headland and most of the upland habitats will remain untouched.  It should be noted that the areas are generally steep and are expected to be mainly utilized by birds and butterflies, which are less affected by such fragmentation and isolation effects.

Other Impacts

Secondary impacts to the surrounding habitats (generally of low ecological importance) and associated wildlife may arise from the potential for increased noise impacts, blasting, human activities and disturbance and construction site runoff.  These impacts are expected to be low, owing to the temporary nature and relatively small scale of the construction works and given that good construction practice, environmental controls and regular checks on the construction boundaries will be conducted.  Impacts are expected to be acceptable.

Operational Phase

Operational phase impacts to terrestrial ecology may arise from increased human activities in the area resulting in disturbance to the surrounding habitats and associated wildlife, if uncontrolled.  Given the generally low level of human activity required to operate the terminal it is not expected that operational phase impacts will occur.  Vaporization of LNG will be a potential risk provided that there is an ignition source in the vicinity.  In the unlikely event of leakage of LNG, the fire prevention system will be implemented (details are presented in Part 3 Section 13 Hazard to Life Assessment), and consequently impacts to the terrestrial ecological resources through the spread of fire will be prevented.  The impacts associated with accidental spills of LNG are discussed in Part 3 Section 13 Hazard to Life Assessment.

Where possible, structures will utilise appropriate design to complement the surrounding landscape.  Materials and finishes will be considered during detailed design.  All of the major lighting sources will be pointed inward and downwards to avoid disturbance to birds.  Air quality and noise impacts on the birds due to the operation of the terminal are expected to be low and not significant.

Cumulative Impact

At present, there are no planned projects at Black Point that could create cumulative terrestrial ecological impacts during the construction of the LNG terminal.  Therefore, no cumulative impacts will arise.

8.6.4                                Impact Evaluation

Habitat Loss

Potential impacts have been evaluated according to Table 1 of Annex 8 of the EIAO-TM.  Tables 8.18 to 8.20 present an evaluation of the habitat loss due to the Project.

The permanent and temporary habitat loss of shrubland will be approximately 4.2 ha and 0.7 ha respectively.  Two locally protected plant species, the Pitcher Plant and Bamboo Orchid were recorded within the Project Area.  No faunal species of conservation interest were recorded as inhabiting the Shrublands within the Project Area.  In view of the availability of similar habitat in the vicinity and the mitigation measures, it is considered that impacts to wildlife and habitat are of low to moderate severity and acceptable.

Table 8.18      Overall Impact Evaluation for Shrubland within the Project Area

Evaluation Criteria

Shrubland

Habitat quality

The habitat quality is moderate.

Species

Two locally protected plant species Pitcher Plant and Bamboo Orchid were recorded within the Project Area.  No faunal species of conservation interest were recorded as inhabiting the Project Area. 

Size/Abundance

Area lost permanently and temporarily are approximately 4.2 ha and 0.7 ha respectively.

Duration

The impact will persist during the construction and operational phases for the LNG storage tanks but will be temporary for the haul road as it will be reinstated after completion of construction work. 

Reversibility

It is re-creatable but will take time for the habitat to reach maturity.

Magnitude

The scale of the habitat loss is moderate in the context of the surrounding similar habitats.

Overall Impact Conclusion

Low to moderate

Approximately 1.0 ha of developed area will be lost.  In view of the low occurrence of wildlife and the negligible ecological importance of the habitat, it is believed that the impact severity of this habitat loss is negligible.


Table 8.19      Overall Impact Evaluation for Developed Area within the Project Area

Evaluation Criteria

Developed Area

Habitat quality

The habitat quality is negligible.

Species

Nil. 

Size/Abundance

Area lost permanently is approximately 1.0 ha.

Duration

The impact will persist during the construction and operational phases. 

Reversibility

It is readily re-creatable.

Magnitude

The scale of the habitat loss is small in the context of the surrounding similar habitats.

Overall Impact Conclusion

Negligible

Approximately 135 m of drainage channel will be lost.  In view of the low occurrence of general wildlife and the negligible ecological importance of the habitat, it is believed that the severity of habitat loss of drainage channel is negligible.

Table 8.20      Overall Impact Evaluation for Drainage Channel within the Project Area

Evaluation Criteria

Drainage Channel

Habitat quality

The habitat quality is negligible.

Species

Nil. 

Size/Abundance

Approximately 135 m length will be permanently lost.

Duration

The impact will persist during the construction and operational phases. 

Reversibility

It is readily re-creatable.

Magnitude

The scale of the habitat loss is small in the context of the adjacent similar habitats.

Overall Impact Conclusion

Negligible

In conclusion, the direct ecological impact due to the construction of the LNG terminal is expected to be low to moderate, and will not contribute to any cumulative impacts.

Although, the habitat loss due to the Project will reduce the areas of foraging and feeding grounds of wildlife, the potential impacts are expected to be low to moderate owing to the extensive area of unaffected natural habitat (shrubland) available in close proximity to the Project Area.  The temporary nature and relatively small scale of the construction works, in combination with regular checks on construction boundaries, render the habitat loss as acceptable.  Potential impacts on the two protected plant species, the Pitcher Plant and Bamboo Orchid, will be reduced through transplantation prior to the commencement of the construction works.

Other Associated Impacts

Habitat Fragmentation and Isolation – Given that the LNG terminal will mainly be located along the coastline, (whereas the shrublands are located on the physically isolated headland) and the scale of the habitat loss is small in the context of the surrounding similar habitats, the potential impacts of habitat fragmentation and isolation are considered to be minimal. 

Other Impacts – Increased human activities and disturbance due to the Project during construction and operation have the potential to affect the surrounding natural habitats and the associated wildlife.  These potential impacts are expected to be low given good construction practice, environmental management controls will be implemented, and that regular checks on construction boundaries will be conducted.  Impacts during the operational phase are expected to be acceptable.

8.7                                      Summary of Mitigation Measures

Annex 16 of the EIAO-TM states that the general policy for mitigation of significant ecological impacts, in order of priority, is:

Avoidance:  Potential impacts should be avoided to the maximum extent practicable by adopting suitable alternatives;

Minimisation:  Unavoidable impacts should be minimised by taking appropriate and practicable measures such as constraints on intensity of works operations or timing of works operations; and

Compensation:  The loss of important species and habitats may be provided for elsewhere as compensation.  Enhancement and other conservation measures should always be considered whenever possible.

8.7.1                                Avoidance

As part of the site selection process for the LNG terminal, a total of 27 sites, have been analysed (see Part 1 Section 5 of this EIA).  Two sites (Black Point and South Soko) were selected for further assessment.  Disturbance to terrestrial ecological resources of acknowledged conservation significance has been avoided by screening out the following from consideration:

·           Wild Animal Protection Areas;

·           Conservation Areas;

·           Coastal Protection Areas;

·           Registered Sites of Special Scientific Interests (SSSIs); and,

·           Country Parks.

The Project Area at Black Point (mainly shrubland), as well as the whole of the Study Area, are not considered to be of high importance to wildlife.  None of the terrestrial habitats recorded in the Study Area at Black Point were of high ecological importance, with most of the habitats recorded as moderate to low, and two regarded as negligible in terms of their ecological importance.  The impacts from the LNG terminal therefore are expected to be low with the adoption of appropriate construction practices.

8.7.2                                Minimisation

The discussion in Section 8.6 has indicated that the impacts on ecological resources due to the construction and operation of the LNG terminal are generally expected to be low and acceptable.  The following measures will be taken to further reduce impacts to terrestrial ecological resources.

Habitat and Wildlife

·           According to the site selection options for the terminal footprint in Black Point (detail please refer to Part 3 Section 2), this proposed option involves partially sea reclamation and partially land formation by cutting on the existing headland.  It should be noted that this option can make a balance of cut and fill.  The disturbance of existing headland shall comprise of 4.9 ha of shrubland only.  This is a win-win option to reduce the disturbance through either full sea reclamation (disturbance to marine habitat and mammals) or full excavation of land area (disturbance to terrestrial habitat). 

·           Structures will utilise appropriate design to complement the surrounding landscape wherever possible.  Materials and finishes will be considered during detailed design; and,

·           All of the major lighting sources will be pointed inward and downwards to avoid disturbance to birds. 

Vegetation Loss

The Pitcher Plants and Bamboo Orchids (both < 10 individuals) recorded within the Project Area will be transplanted to a similar habitat, i.e., rocky shore with freshwater seepage or near to a small stream, such as the undisturbed rocky shore of Black Point or the seasonal stream recorded within the Study Area.  Pitcher Plants have been successfully transplanted in Hong Kong, for example under the Environmental Permit requirements for the construction of the Theme Park at Penny’s Bay ([58]) ([59]) ([60]). 

A detailed vegetation survey on the Pitcher Plants and Bamboo Orchids would be conducted within the impacted shrubland and Project Area by a suitably qualified botanist/ ecologist to identify and record the affected individuals prior to the commencement of site clearance works.  Feasibility and suitability of transplanting the affected plant species of conservation interest would be carefully studied and suitable receptor sites would be identified.  Detailed transplantation proposal providing information of transplantation methodology, recipient site, implementation programme, watering requirement, post-transplanting monitoring and personal involved shall be submitted to and approved by EPD and AFCD.  Transplantation would be undertaken and supervised by a suitably qualified botanist/ horticulturist.  After transplantation, monitoring will be undertaken to check the performance and health conditions of the transplanted individuals on a weekly basis in the first month after transplantation and monthly basis for additional eleven months.  Remedial actions will be discussed with AFCD in the event of unsuccessful transplantation. 

Appropriate Construction Practice

·           Erect fences along the boundary of the works area before the commencement of works to prevent vehicle movements, and encroachment of personnel, onto adjacent areas; and,

·           Avoid damage and disturbance to the remaining and surrounding natural habitats.

8.7.3                                Compensation

To compensate for the permanent and temporary loss of 4.9 ha of shrubland for the construction of the terminal, haul road and storage tanks on the existing shrubland, at least 0.7 ha of shrubland will be planted at the temporary haul road and newly formed slope within the Project Area to provide shrubland habitat at the temporary haul road.  Species used for planting will take reference from the species identified in the surrounding area and/or Section 8.4, and be native to Hong Kong and the South China region. 

The loss of 4.2 ha tall shrubland habitat will be compensated by enhancement planting at the existing shrubland located to the south of the headland.  Six hectare of the existing shrubland, which has relatively lower species diversity and low vegetation coverage, will be enhanced through native tall shrubs planting.  Increase of the structural complexity and species diversity would enhance the ecological value of the existing shrubland.

An Enhancement Planting Plan with plant species to be used, their size and detail planting matrix is required to be prepared by qualified ecologist and landscape architect.  Planting shrubs should make reference to the plant species recorded in the affected shrubland.  Enhancement planting is preferable to minimise the impacts of the existing shrubs with good conditions.  Detailed enhancement planting proposal providing information of planting methodology, recipient site, implementation programme, watering requirement, post-planting monitoring and personal involved shall be submitted to and approved by EPD and AFCD.  Enhancement planting would be supervised by a suitably qualified botanist/ landscape architect prior to the commencement of site clearance works.  After enhancement planting, monitoring will be undertaken to check the performance and health conditions of the planted individuals on a monthly basis for 12 months. 

8.8                                      Residual Environmental Impacts

The Project will involve the permanent loss of approximately 4.2 ha of shrubland.  The affected habitats are considered to be of moderate ecological value.  No significant residual impact due to the construction and operation of the LNG terminal is expected in view of reduction of land excavation and disturbance to the existing shrubland (during layout option selection process), extensive similar habitat in the vicinity, and the implementation of the proposed mitigation measures including provision of 0.7 ha of compensatory planting of shrubland, 6 ha of enhancement planting and transplantation of Pitcher Plants and Bamboo Orchids.  It should be noted that this option, partially sea reclamation and partially land formation by cutting on the existing headland, can make a balance of cut and fill.  This is a win-win option to reduce the disturbance through either full sea reclamation (disturbance to marine habitat and mammals) or full excavation of land area (disturbance to terrestrial habitat). 

8.9                                      Environmental Monitoring and Audit

The implementation of the ecological mitigation measures described in Section 8.7 will be checked as part of the Environmental Monitoring and Audit procedures during the construction period. 

8.10                                  Conclusions

The terrestrial ecological resources recorded within the Study Area include plantation, shrubland, shrubby grassland, stream/channel, orchard and developed areas, with their associated wildlife.  Of these habitats, shrubland located at the western part of the headland is of moderate ecological importance, shrubland located at the southern part of the headland and the stream are low to moderate in ecological importance, while the remaining habitats are of low or negligible ecological importance.

The impact on natural habitats within the Project Area is considered to be low to moderate, and no adverse residual impact is expected after the implementation of the proposed mitigation measures, comprising appropriate construction practices, reinstatement of affected areas of shrubland (temporary haul road), transplantation of Pitcher Plants and Bamboo Orchids and compensatory planting of shrubland and enhancement planting will reduce potential disturbance to the surrounding environment.  Environmental monitoring and audit measures in the form of regular checks will be undertaken. 

During the operation phase of the LNG terminal at Black Point adverse impacts to terrestrial ecological resources are not expected to occur. 


 

 



([1])      ERL Asia Ltd (1992). Environmental Impact Assessment of the Proposed 6000MW Thermal Power Station at Black Point: Initial Assessment Report Volume 1 The Surrounding Environment.

([2])      ERL Asia Ltd (1992). Ibid

([3])      ERL Asia Ltd (1992). Op cit.

([4])      CW48877 dated 3rd July 2003 at 3,000 feet.

([5])      Newsletter of Department of Ecology & Biodiversity, University of Hong Kong Issues 1 to 33.

([6])      Dudgeon D and Corlett R (2004).  The Ecology and Biodiversity of Hong Kong.  The Hong Kong University Press.

([7])      Young J. J. and Yiu V. (2002). Butterfly Watching in Hong Kong.  Wan Li Book Co Ltd..

([8])      Yiu V (2004)  Butterfly Watching in Hong Kong. Hong Kong Lepidopterist’s Society, Hong Kong.

([9])      Wilson, K.D.P 2004.  Field Guide to the Dragonflies of Hong Kong. Agriculture, Fisheries and Conservation Department, Hong Kong.

(8)      Xing, F.W., Ng, S.C., Chau, L.K.C. (2000).  Gymnosperms and angiosperms of Hong Kong. Memoirs of the Hong Kong Natural History Society 23: 21-136.

([11])    Karsen, S. J., Lau, M. W. N. and Bogadek, A. (1998).  Hong Kong Amphibians and Reptiles. Urban Council, Hong Kong.

([12])    Lau Paul (1997). Butterflies of Hong Kong. Brilliant Printing Company.

([13])    Wu, S. H and Lee.T. C (2000).  Pteridophytes of Hong Kong.  Memoirs of the Hong Kong Natural History Society: 23:5-20.

([14])    Carey, G.J., Chalmers, M.L., Diskin, D.A., Kennerley, P.R., Leader, P.J., Leven, M.R., Lewthwaite, R.W., Melville, D.S., Turnbull, M., and Young, L. (2001).  The Avifauna of Hong Kong.  Hong Kong Bird Watching Society Hong Kong.

(1)      ERL Asia Ltd (1992). Op cit.

([16])    Dudgeon D and Corlett R (2004).  Op cit.

([17])    ERL Asia Ltd (1992). Op cit.

([18])    ERL Asia Ltd (1992). Op cit.

([19])    ERL Asia Ltd (1992). Op cit.

([20])    Carey, G.J., et al (2001). Op cit.

([21])    Xing, F.W., Ng, S.C., Chau, L.K.C. (2000).  Op cit.

([22])    Wu, S. H and Lee.T. C (2000).  Op cit.

([23])    AFCD (2003).  Rare and Precious Plants of Hong Kong. Cosmos Books Ltd.

([24])    Carey, G.J.,et al. (2001).  Op cit.

([25])    Wilson D.E. and D.M. Reeder. (1992). Mammal species of the world: A taxonomic and geographic reference. Smithsonian Institution Press, Washington & London.

(2)      Karsen, S. J., Lau, M. W. N. and Bogadek, A. (1998).  Op cit.

([27])    Lau, M.W.N. and D. Dudgeon (1999).  Composition and distribution of Hong Kong Amphibian fauna.  Memoirs of the Hong Kong Natural History Society 22: 1-80.

([28])    AFCD (2005).  A Field Guide to the Amphibians of Hong Kong. Friends of the Country Parks.

(1)      Walthew G (1997).  The status and flight periods of Hong Kong butterflies Porcupine! 16: 34-37.

([30])    Yiu V (2004).  Op cit.

([31])    Wilson, K.D.P (2004).  Op cit.

([32])    Chong, D. H. and D. Dudgeon (1992).  Hong Kong stream fishes: an annotated checklist with remarks on conservation status.  Memoirs of the Hong Kong Natural History Society Vol. 19 pp. 79-112.

([33])    Nelson, J. S., (1994), Fishes of the World, 3rd ed, John Wiley & Sons, Inc. United States of America. Pp. 600.

([34])    AFCD (2004).  Field Guide to the Freshwater Fish of Hong Kong. Friends of the Country Parks.

([35])    Fowler, H. W., (1972), A Synopsis of the Fishes of China, Vols. 1 & 2 (reprint), Antiquariaat Junk, Dr. R. Schierenberg & Sons N. V., P. O. Box 5, Netherlands. Pp. 1459.

([36])    AFCD (2004).  Field Guide to the Freshwater Fish of Hong Kong. Friends of the Country Parks.

([37])    Yue, P. and Y. Chen (ed), 1998, China Red Data Book of Endangered Animals, Pisces, Science Press, Beijing, China. Pp. 247, pls. VII.

([38])    Dudgeon D and Corlett R (2004).  The Ecology and Biodiversity of Hong Kong.  The Hong Kong University Press.

([39])    Dudgeon D and Corlett R 2004.  Op cit.

([40])    Dudgeon D and Corlett R 2004.  Op cit.

([41])    Dudgeon D and Corlett R 2004.  Ibid.

([42])    Dudgeon D and Corlett R 2004.  Ibid.

([43])    Carey, G.J., et al (2001).  Op cit.

([44])    Viney, C., Phillipps, K., and Lam, C.Y. (1996): Birds of Hong Kong and South China. Government Printer, Hong Kong.

([45])    Tsim S T, Lee W H, Cheung C S, Chow K L, Ma Y N and Liu K Y (2003).  The population and breeding ecology of white-bellied sea eagles in Hong Kong.  Hong Kong Biodiversity. Issue 5 August 2003 Page 1-3.

([46])    Bascombe, M. J., G. Johnston and F. S. Bascombe. (1999).  The Butterflies of Hong Kong.  Academic Press, United Kingdom.

([47])    Walthew, G. (1997).  The status and flight periods of Hong Kong butterflies.  Porcupine! 16: 34-37.

([48])    Bascombe, M. J., G. Johnston and F. S. Bascombe. (1999).  Ibid.

([49])    Yiu V (2004).  Op cit.

([50])    Yiu V (2004).  Ibid.

([51])    Walthew, G. (1997).  Op cit.

([52])    Wilson K (2004).  Op cit.  

([53])    Karsen, S. J., Lau, M. W. N. and Bogadek, A. (1998).  Op cit.

([54])    Karsen, S. J., Lau, M. W. N. and Bogadek, A. (1998).  Ibid.

([55])    Karsen, S. J., Lau, M. W. N. and Bogadek, A. (1998).  Ibid.

([56])    Karsen, S. J., Lau, M. W. N. and Bogadek, A. (1998).  Ibid.

([57])    Ades, G. (1999).  The species composition, distribution and population size of Hong Kong bats. Memoirs of the Hong Kong Natural History Society 22:183-209.

 

([58])    ERM HK Ltd. 2000.  Construction of an International Theme Park in Penny's Bay of North Lantau together with its Essential Associated Infrastructures - Environmental Impact Assessment.

([59])    TAS Joint Venture 2002.  Infrastructure for Penny’s Bay Development Contract 2 - The Decommissioning of Cheoy Lee Shipyard: Detailed Transplantation Proposal for Restricted/Protected Plant Species.

([60])    ERM HK Ltd. 2002-2004.  Infrastructure for Penny's Bay Development, Contract 2: Monthly Environmental Monitoring and Audit Reports.