Title: Ecological Risk Assessment in a Lake Watershed Based on Ecosystem Level
Abstract: In order to perform ecological environment management and control of ecological risk in a basin,an ecological risk assessment( ERA) model of a lake basin was built on the basis of ERA frameworks and relative risk model( RRM). By analyzing mutual coupling effects between the socio-economic and ecological systems,and regarding ecological services as the endpoints and ecosystem as the risk receptor,the regional relative ecological risk was characterized by describing and quantifying the risk components and their relationships.This model was applied in the upstream Taihu Lake Watershed. The results showed that Wuxi-Jiangyin and Changxing-Anji regions exhibited the highest and the lowest ecological risks,respectively. Liyang-Yixing,Changzhou-Jintan,Huzhou-Deqing,and ChangxingAnji regions yielded 73. 2%,78. 8%,74. 4% and 59. 9% of the highest ecological risk,respectively. The main risk sources of each region were different. Huzhou-Deqing area was mainly affected by water conservancy establishment,while the contribution rate of every risk source was relatively balanced in the Anji-Changxing area. In other areas,the effects of industries,agriculture and aquaculture as risk sources were severe,with risk contribution rates being 13%-18%,12%-19% and 8%-15% respectively. Thus,ecological services of aquatic products biomass and water purification ability were mainly affected.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot