胶州湾西部海域大型底栖动物多样性的研究

为了揭示胶州湾最近几年底栖动物多样性的变化,作者于2003年9月到2004年9月在胶洲湾西部海域5个测站每2个月1次共进行了7个航次采样,以种类组成、生物量和栖息密度为基础,对大型底栖动物多样性进行了分析。使用PRIMER软件计算得到以下变量:群落的物种数(S)、丰富度(D)、Shannon-Wiener物种多样性指数(H')和均匀度指数(J')。结果表明:位于大沽河口的D站和水道中央的S站的多样性最低;养殖区内外站位的多样性差异显著;丰度/生物量曲线表明,养殖区内的底栖动物群落已经受到了一定程度的扰动。群落物种数(S)和丰富度(D)的季节性变化明显,春季和秋季较低,夏季和冬季较高。分析菲律宾蛤仔(Ruditapes philippinarum)增养殖区的站位(D)发现,多样性指数和丰富度与次级生产力有着负相关的关系。物种多样性指数和丰度/生物量曲线的分析显示,该研究海域处于一个轻度人为扰动的状态。

Macrofaunal diversity in the western Jiaozhou Bay, Shandong

We surveyed the macrofauna diversity at five sampling stations of the Jiaozhou Bay during seven cruises from Sept.2003 to Sept.2004.The species diversity was studied based on quantitative investigations of species composition,biomass and secondary production.The results showed the following:stations D and S,located at Dagu River estuary and central channel respectively,had the lowest diversity indices.Diversity indices differed significantly between the stations inside and oustide the aquicultural area.The number of species(S)and Margalef's richness index(D)demonstrated distinct seasonal variations:they were lower in spring and autumn and higher in winter and summer.Among all the environmental factors examined,only Shannon-Wiener diversity index(H')and Margalef's richness index had negative correlations with macro-faunal secondary production.Both the results of diversity indices and abundance/biomass curves indicated that the macrobenthic community in aquicultural areas was disturbed to a certain degree.