Table 5.4c        Ecological Value of Freshwater Habitats & Rocky Shore in the Assessment Area

 

Criteria

Freshwater Habitats

Rocky Shore

Naturalness

Temporary streams are largely natural. Ponds are man-made.

The rocky shore is largely undisturbed by human activity.

Size

 Area of artificial pond within assessment area is approximately 0.7ha. The total length of stream is about 500m.

Area of this habitat within assessment area is approximately 4ha.

Diversity

Low.

Typical of other semi-exposed shores in Hong Kong

Rarity

Two faunal species (Black-crowned Night Heron, Nycticorax nycticorax; and Yellow Bittern, Ixobrychus sinensis) of conservation importance recorded from artificial ponds.

One faunal species (Pacific Reef Egret, Egretta sacra) of conservation importance recorded from rocky shore.

Re-creatability

Recreatability of artificial pond is high. Recreatability of natural stream is moderate.

Habitat is re-creatable

Fragmentation

Habitats are not fragmented.

Low

Ecological linkage

Habitat is not structurally or functionally linked to any high ecological value resources.

The rocky shore habitat falls partially within CPA.

Potential value

Low.

Low.

Nursery ground

Artificial pond at Tai Shue Wan probably supports a small breeding population of Black-crowned Night Herons.

No record of significant nursery or breeding ground was found in the survey.

Age

Not applicable.

Not applicable.

Abundance/ Richness of Wildlife

Low.

Moderate. Typical species of similar composition and abundance as other semi-exposed rocky shores in Hong Kong.

Ecological value

Low to Moderate

Low to Moderate