象山港大型底栖动物群落特征

THE MACROBENTHIC COMMUNITY OF THE XIANGSHAN BAY

2006年7月—2008年8月,对象山港全港海域设立的13个采样站位采集的调查资料,用物种丰富度指数、物种均匀度指数和物种多样性指数分析象山港大型底栖动物物种的多样性和群落种类的组成,以及采用ABC曲线方法和大型多元统计分析软件PRIMER5对象山港大型底栖动物进行Bray-Curtis相似性聚类分析和非度量MDS标序,研究象山港大型底栖动物群落结构。调查显示象山港大型底栖动物不同采样站位之间物种丰富度指数(d)、均匀度指数(J)、辛普森多样性指数(D)和香农-威纳多样性指数(H’)差异皆高度显著(P<0.01)。群落结构聚类分析和MDS标序表明,13个采样站位的大型底栖动物群落大致可分为3组。根据所调查象山港大型底栖动物的丰度和生物量资料做的ABC曲线分析表明,该海域大型底栖动物群落受到了严重的环境污染或者扰动,逐渐由一种或几种个体较小的种类占优势。

We collected macrobenthic samples in 13 intertidal stations in the Xiangshan Bay, Zhjejiang, in July 2006 to August 2008, and analyzed the macrobenthic community using the Species Richness Index （d）, Species Evenness Index （J）, Species Diversity Index （D）, and Shannon-Weiner Index （H＇）. Adopted the ABC Curve method and PRIMER5.0 we analyzed the Bray-Curtis similarity matrix and MDS analysis of Xiangshan bay macrobenthos. The investigation showed that the differences in d, J, D and/T of Xiangshan Bay macrobenthos between different sampling stations were highly significant. The results of CLUSTER and MDS show that the macrobenthic community of the Xiangshan Bay constitutes three groups. The results of ABC Curve method indicated that the macrobenthic community affected by pollution and other human activities had been gradually dominated by one or several types of smaller individuals.