象山港潮间带生物种类组成及数量分布

分析了象山港潮间带生物的种类组成、数量分布和季节变化等特点.结果表明：该海域潮间带共有底栖生物158种,以软体动物和甲壳类居多,两者分别占总种类数的41%和33%.潮间带生物2年平均生物量为101.1g.m-2,平均栖息密度为359.2ind.m-2.各类群生物中,平均生物量及栖息密度软体动物居首位.潮间带生物季节变化特点为生物栖息密度春季最大,生物量夏季最高.与历史调查数据相比,本次调查结果均低于以往,表明沿港工业的发展和人类活动的影响导致潮间带生物群落结构的演替和数量的变化.

Study on Species Composition, Quantity Distribution of Intertidal Benthos in Xiangshan Bay

The characteristics of species composition,quantity distribution and bioecology of intertidal benthos in Xiangshan Bay of Zhejiang Ningbo are analyzed in this paper.The results indicate that there are 158 species,the most of which are molluscs and crustacea accounting for 74% of all species,and some species are of high commercial value.The average biomass and density is found to be 101.1 g·m-2 and 359.2 ind·m-2,respectively.The molluscs is ranked top in terms of biomass,density of the benthos,composition of dominant and main species,as well as seasonal variation of quantity on intertidal benthos in the ecological habitat.Diversity study shows that the macrobenthic community in the region has been disturbed.