天津海域底栖线虫群落结构的多元统计分析

Multivariate Statistical Study on the Community Structure of Benthic Nematoda in the Offshore Area of Tianjin

应用多元统计分析方法(等级聚类分析和非度量多维标度)研究了天津近岸海域的底栖线虫群落结构情况。结果表明,等级聚类分析和非度量多维标度分析的结果具有很好的一致性。15个取样站位的线虫群落存在差异,根据线虫种类组成和丰度不同,调查站位可以分为4组。中南部近岸海域多数站位的线虫种类组成相似,深水区域的底栖线虫种类变化最大,而北部湾顶海域的线虫组成近似,但与其他站位相差较大。

The community structure of benthic nematoda in Tianjin offshore area was analyzed with the multivariate statistical method.A total of 15 stations were arranged for nematoda sampling.The results between hierachical cluster and non-metric Multi-Dimensional Scaling（MDS） were much accordant.Both the results indicated that the community structure of benthic nematoda varied with the survey stations,and these stations could be divided into four groups according to the nematoda species and their abundance.Most of the middle and southern stations had similar community structure,but the northern stations had particular nematoda components.And the nematoda species varied greatly in the deeper water area.