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为了解浙江南部近岸海域海洋生态环境质量的现状及其变化趋势,2009年4月对浙江南部近岸海域的12个站位进行了大型底栖生物的分类、组成、丰度、生物量以及多样性的研究.应用Bray-Curtis相似性系数聚类和多维尺度排序,对浙江南部近岸海域的大型底栖生物进行群落划分;采用丰度生物量比较法分析群落的稳定性;并研究了对大型底栖生物产生影响的主要环境因子.本次调查共鉴定大型底栖生物109种,多毛类、软体动物和甲壳动物构成主要类群.平均生物量为23.38g/m2,平均丰度为335.5 ind/m2,平均生物多样性指数为2.69.数量组成:生物量以软体动物居首(13.29 g/m2),鱼类次之(3.68 g/m2);丰度以多毛类居首(268.0 ind/m2),软体动物次之(51.7ind/m2).浙江南部近岸海域可划分为3个群落.与环境因子进行相关性分析表明,有机污染含量、深度、溶解氧含量、盐度和悬浮物含量是对浙江南部近岸海域大型底栖生物产生影响的主要环境因子.总体上,除了瓯江口和乐清湾海域受到一定扰动,浙江南部近岸海域大型底栖生物环境质量较好,群落结构较为稳定.
In order to understand the current situation and the changing trend of the marine ecological environment quality in the coastal areas in southern Zhejiang Province, the macrobenthic taxonomic classification, composition, abundance, biomass, and biomass of 12 stations in the coastal areas of southern Zhejiang were studied in April 2009 Diversity.By using Bray-Curtis similarity coefficient clustering and multidimensional scaling, the macrobenthos in the coastal waters of southern Zhejiang were divided into communities, the abundance of biomass was used to analyze the stability of the community, The main environmental factors affecting macrobenthos were 109 species of macrofauna, polychaetes, molluscs and crustaceans were identified in this investigation.The average biomass was 23.38g / m2 and the average abundance was 335.5 ind / m2, and the average biodiversity index was 2.69. Quantitative composition: biomass dominated by molluscs (13.29 g / m2), followed by fish (3.68 g / m2) / m2), followed by mollusks (51.7 ind / m2) .According to the correlation analysis with environmental factors, the contents of organic pollution, depth, dissolved oxygen content, salinity and suspension Material content is on the south of Zhejiang Coastal waters of large benthic impact of the environmental factors. In general, in addition to Oujiang and subject to certain perturbations of Yueqing Bay, south of Zhejiang coastal waters of large benthic environment is better quality, more stable community structure.