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当前位置: 首页 > 文章 > 长江口及邻近渔业水域生态环境质量综合评价 农业环境科学学报 2005,24 (02) 270-273
Position: Home > Articles > Comprehensive Assessment for Fisheries Eco-environmental Quality in Changjiang Estuary and Its Adjacent Zones Journal of Agro-Environment Science 2005,24 (02) 270-273

长江口及邻近渔业水域生态环境质量综合评价

作  者：
沈新强;晁敏
单  位：
中国水产科学研究院东海水产研究所;农业部海洋与河口渔业重点开放实验室;农业部海洋与河口渔业重点开放实验室 上海200090
关键词：
长江口;渔业水域;生态环境质量;综合评价
摘  要：
根据2002—2003年进行的对我国长江口及邻近渔业水域的水质、表层沉积物质量和浮游生物的监测结果,采用主成分分析法,综合评价了该渔业水域的生态环境质量状况。结果表明,长江口水域生态环境综合质量处于“中污染”状态。在4航次中除2003年5月处于“轻污染”级别外,其余3航次均处于“中污染”级别。长江口水域生态环境综合质量具有明显的季节性变化特征,夏季该区生态环境质量状况劣于春季。从水质、底质、生物指标对总得分的贡献率来看,长江口水域水质指标的贡献率最高,达到66.83%,生物指标为23.37%,底质指标贡献率最低,仅为7.80%,长江口及邻近渔业水域生态环境质量主要受水质指标影响。对二级指标得分对总得分贡献率进行深入分析,贡献率大于5%的指标为:C u(28.88%),叶绿素a(15.96%),油类(14.52%),无机氮(8.47%),浮游植物(7.05%),由此可认为C u、叶绿素,油类、无机氮、浮游植物指标是长江口及邻近水域生态环境质量的主要指示指标。
译  名：
Comprehensive Assessment for Fisheries Eco-environmental Quality in Changjiang Estuary and Its Adjacent Zones
作  者：
SHEN Xin qiang, CHAO Min (East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Key Lab of Marine and Estuary Fisheries, Ministry of Agriculture, Shanghai 200090, China)
关键词：
Changjiang Estuary; fisheries waters; eco-environment quality; comprehensive assessment
摘  要：
The Changjiang River estuary is an important ecological and economic area in fisheries. In recent years, the ecological environment quality of the waters tends to decrease. Based on the monitoring results of water quality, sediment and plankton in the fisheries waters near the Changjiang River estuary in May and August of 2002 to 2003, using principal component analysis (PCA) method and sea water quality standard, marine sediment quality standard and bio-diversity index standard, the eco-environment quality of the fisheries waters were assessed. The mean total score showed that the comprehensive quality was at the level of “middle pollution”, and at “light pollution”level in May 2003, but at “middle pollution”level in other three seasons. There existed a typical seasonal change of eco-environmental quality in the assessment areas. The eco-environmental quality in spring season was better than that in summer. Thecontribution rate of water index to total score was 66.83%, while, sediment and plankton contribution rate were 7.80%, 23.37%respectively, which meant that the water quality index significantly influenced the mean eco-environmental quality of Changjiang Estuary. Analyzing the second index contribution rate ofwater, sediment and plankton, we found that the contribution rates of five indexes were larger than 5%(Copper, 28.88%; Chlorophyll a, 15.96%; Oil, 14.52%; Inorganic Nitrogen, 8.47%; Phytoplankton, 7.0%). These five indexes could be regarded as the indicator index of eco-environmental quality near Changjiang Estuary waters.

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