2003年夏季浙江沿岸大型底栖生物生态分布特征

Ecological characteristics of macrobenthos along the coast of Zhejiang during the summer of 2003

根据2003年夏季在浙江沿岸休闲生态型人工鱼礁拟投海域开展的综合调查所获的大型底栖生物等资料,共鉴定出大型底栖生物118种,其中多毛类、甲壳动物和软体动物分别占总种数的41%、29%和20%,浙江沿岸总平均生物量和栖息密度分别为11.04 g/m2?和230 ind/m2。通过种类相似性聚类和优势度等分析,将浙江沿岸大型底栖生物划分为4个群落。同时,用种内个体对数-正态分布法对各调查站位大型底栖生物群落结构受扰动的程度进行了分析,结果有60%的站位底栖生物群落已受到中度的扰动。

The data from the investigation of macrobenthos along the coast of Zhejiang where the artificial reef would be put in summer of 2003 are analyzed. 118 species have been identified. According to the findings, the number of filose, mollusk and crustacean oeout for 41%, 29% and 20% of the total species, respectively. The average biomass is 11.04 g/m^2 and the average inhabited density is 230 ind/m^2. Four communities are divided by using the methods of species similar clustering and dominance analysis. At the same time the disturbance of the community structure of macrobenthos in each station has been analysed by using the log-normal distribution of individuals among species, and the result shows that about 60 % stations have been disturbed.