Assessment of annual variation for ecosystem health at Meiliang Bay,Lake Taihu

Abstract

Abstract: Ecosystem health is a new field in ecology and environmental management.Lake ecosystem health contains the capability of supplying services for people and maintaining its function and restoration.Assessment of lake ecosystem health is the basis of lake environmental management and ecosystem control.Exergy(Ex),structural exergy(Ex(st)) and ecological buffer capacity(β) were applied to the ecosystem health assessment of annual variation at Meiliang Bay ecosystem.The health state of Meiliang Bay ecosystem in 2001 decreased as the following order: March to April,January to February,November to December,September to October,May to June,and then July to August,which was similar to those estimated by trophic state index(TSI) and diversity index(DI).Therefore it is feasible to use exergy,structural exergy and ecological buffer capacity to evaluate the health state of lake ecosystem.

Key words: Horqin desert land, Land use, Temporal and spatial change

CLC Number:

X524

HU Zhixin, HU Weiping, ZHANG Fabing, ZHONG Chunni . Assessment of annual variation for ecosystem health at Meiliang Bay,Lake Taihu[J]. cje, 2005, (7): 763-767.

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