Queen’s College Old Boys’ Association Secondary School – Group 2

Since there are a proposed large scale private housing development in Chuen Lung, which is a valuable environment for the organisms, such as salamanders there. In the process of construction, there must be great damage to the habitats there, so an ecological impact assessment must be done to avoid breaking the balance between environment and economy.

Weather condition

Date : 1-3-2006

Temperature : Maximum – 14C

Minimum – 9C

Average -10C

Weather : Cold, Dry, Windy, Cloudy

HabitatA - Grassland

B – Shrubland

C – Woodland

D – Freshwater Stream

E – Abandoned Farmland

Vegetation survey

No. of Tree Species Few

More Abundant Species Peach(桃樹 )

No. of Shrub Species Many

More Abundant Species Lantana(馬櫻丹 )

No. of Herb species Many

More Abundant Species Day-Flower(竹節草 )/Mile – a – Minuteweed(薇甘菊 )

Mammal surveyMammal Observed

Cow Dog

Location Abandoned Farmland

Anywhere

Butterfly and dragonfly

Butterflies

observed

Larvae

(蝴蝶幼蟲 )

Common Hedge Blue

(紐灰蝶 )

Location Grassland Grassland

Stream survey

Insect, Larvae, Nymphs Observed

Name (水蜈蚣 )

Dragonfly nymphs(蜻蜓若蟲 )

Mayfly(五月飛 ) nymphs

Water bettle larva(龍虱幼蟲 )

Water skater(水黽 )

No. of species

1 Some 7-8 1 2

Snails, Clams observed

Name Large Stream Snail(大河螺 )

Reservoir Snail(水塘螺 )

Ramshorn

Snail(凸旋螺 )

No. of Species

many many many

Fishes Observed

Name Freshwater Goby(林哥魚 )

No. of Species Many

Others Observed

Name Salamander(蠑螈 )

Greater Buckweed(浮萍 )

Smartweed(火炭母 )

Water Smarted(水蓼 )

No. of Species

1 Many Many Many

Evaluation of ecological impact

Possible

impact

Degree of impact

Brief description Mitigation measures

Habitat loss

Severe -Removing trees will destroy habitat

-Animals lose their habitat to live on

-Replant

-Reserving plants & animals

Possible

impact

Degree of impact

Brief description

Mitigation measures

Waste and contamination

Severe Construction wastes and domestic wastes

-Separating sewage before releasing

-Make water treatment plant

Possible

impact

Degree of impact

Brief description

Mitigation measures

Soil erosion and sedimentation

Severe -Deforestation

-No root to catch the soil firmly → soil erosion↑

-Landslide

-Use concrete to cover the land

Possible

impact

Degree of impact

Brief description

Mitigation measures

Air pollution

moderate -Cars

-Machine

-Limiting the cars entry amount

Possible

impact

Degree of impact

Brief description

Mitigation measures

Noise and lighting

Severe Big noise →Bird leave this habitat

Limit the volume of noise in the night

Possible

impact

Degree of impact

Brief description

Mitigation measures

Fragmentation

moderate -Car park stop the stream

-No car park in this area

Possible

impact

Degree of impact

Brief description

Mitigation measures

Extraction of water from streams

Minor No water flow to the later part of stream, affecting habitat

Prepare water for construction use themselves

Important of each habitat

Grassland,shrubland & woodland:

- Fruits of the plants can provide foods or medicine for villagers and wild animals

-habitat for rare insects and animals

-Mainly balance the abundance of CO2 and O2 in the atmosphere

Conclusion