The variation tendency of biodiversity and cause analysis in Hangzhou Bay from 1992 to 2012

Jia Haibo; Tang Jingliang; Hu Haoyan

doi:10.3969/j.issn.0253-4193.2014.12.011

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Jia Haibo, Tang Jingliang, Hu Haoyan. The variation tendency of biodiversity and cause analysis in Hangzhou Bay from 1992 to 2012[J]. Haiyang Xuebao, 2014, 36(12): 111-118. doi: 10.3969/j.issn.0253-4193.2014.12.011

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Jia Haibo, Tang Jingliang, Hu Haoyan. The variation tendency of biodiversity and cause analysis in Hangzhou Bay from 1992 to 2012[J]. Haiyang Xuebao, 2014, 36(12): 111-118. doi: 10.3969/j.issn.0253-4193.2014.12.011

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The variation tendency of biodiversity and cause analysis in Hangzhou Bay from 1992 to 2012

doi: 10.3969/j.issn.0253-4193.2014.12.011

Zhejiang Marine Ecological Environmental Monitoring Station, Zhoushan 316004, China

Received Date: 2013-09-12
Rev Recd Date: 2014-02-19

Abstract

Abstract

Based on 20 years (1992 to 2012) monitoring data maintained by Zhejiang Marine Ecological Environmental Monitoring Station,the current situation and variation tendency of the Hangzhou Bay biodiversity were analyzed. The results showed that the environmental quality of Hangzhou Bay was poor,accompanied by low biodiversity and simple biological community structure. The variation of biodiversity in Hangzhou Bay could be divided into two stages over 20 years. In the first stage,from early 1990's to 2000,indexes of biological communities in Hangzhou Bay decreased markedly. In the second stage,after 2000,some recoveries of biological communities had been found due to strengthening environment protection measures. Correlation analysis showed that DIN,DIP,COD and eutrophication had significant effects on biological diversity in Hangzhou Bay. Variation of biodiversity in the Hangzhou Bay over 20 years was mainly attributed to human activity. Loss of biodiversity was mainly because of sewage discharge induced eutrophication. Meanwhile,reclamation and other coastal development,which led to fragmentation and monotonization of marine habitat,also accelerate the reduction of biodiversity.
- Hangzhou Bay,
- biodiversity,
- variation tendency,
- cause analysis

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References(32)

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