浙江省近岸海域底栖生物生态研究

Studies on benthic ecology in Zhejiang coastal waters

对2003年4～5月在浙江省近岸海域底栖生物调查中获得的126种底栖生物的种类组成、生物量及栖息密度的分布和群落结构进行了叙述和讨论.结果表明：底栖生物种类组成以甲壳动物及软体动物占优势,两者占生物总种数的51.6%;浙江近岸海域底栖生物总平均生物量为18.74 g/m^2;总平均栖息密度为89.1个/m^2.按生态特征划分,调查海域的底栖生物可分成7个群落.分析调查海域各测站群落结构指数可以看出,浙江近岸海域70%测站呈现出生物多样性指数低及种类分布不均匀等特点.

The composition of benthos species, benthic distribution of biomass and density, and community structure were investigated in the coastal waters off Zhejiang Province from April to May in 2003. A total of 126 species of benthos have been identified and most of them are crustacean and mollusca （51.6%）. The totally averaged benthic biomass is 18.74 g/m^2. The totally averaged density is 89.11 ind/m^2. Benthos in this area can be classified into seven types by their ecological characters. According to index of community structure, 70% of the area has a lower diversity index （H＇）.