浙江岱山岛潮间带大型底栖动物的群落结构

Community Structure of the Intertidal Macrobenthic Fauna in Daishan Island,Zhejiang

分析了浙江岱山岛潮间带大型底栖动物的种类组成、数量分布和生物多样性等群落结构特征。该海域潮间带调查采获的大型底栖动物标本26种,其中软体动物16种,节肢动物6种,脊索动物2种,腔肠动物与环节动物各1种。潮间带大型底栖动物总平均生物量为279.22g/m2,总平均栖息密度为493ind/m2。在各类群底栖动物中,平均生物量及密度都以软体动物居首位。岱山岛潮间带大型底栖动物的多样性指数、丰富度指数和均匀度指数的分布范围分别在1.176～2.115、0.833～1.897和0.565～0.801,平均值分别为1.490±0.429、1.223±0.465和0.654±0.104。岱山潮间带大型底栖动物ABC曲线分析表明底栖动物群落中度的污染或者干扰。

The community structure of the intertidal macrobenthic fauna in Daishan island of Zhejiang, such as species composition, quantity distribution and biodiversity, were analyzed in this paper. The results indicated that there were 26 species, including 1 species of Coelenterata, 1 species of Annelida, 2 species of Chordata, 6 species of Arthropoda and 16 species of Mollusca. The average biomass and density in all stations were 279.22 g/mE and 493 ind ·m^-2, respectively. The mollusca were the first in biomass and density among all macrobenthic fauna. The value of Shannon-Weaner index, Margalef＇s species richness index and Pielou＇s evenness index were 1.176-2.115, 0.833-1.897 and 0.565-0.801, and their averages were 1.490±0.429, 1.223±0.465 and 0.654±0.104, respectively. The Abundance/Biomass curves of the intertidal zone of Daishan island showed that the marcobenthic fauna communities were moderately disturbed by all kinds of pollution.