秋季山东南部近岸海域大型底栖动物群落特征

摘要

Macrobenthos was investigated at 36 stations along southern coastal waters of Shandong province in October,2007.A total of 129 macrobenthic species were indentified in the survey area,and the most di-verse taxon was polychaeta(69 species),followed in descending order by Crustacea(35 species),Mollusca (15 species),Echinodermata (3 species)and 6 minor phyla (7 species).The top 3 species with high IRI values were Nephtys oligobranchia,Aricidea sp.,and Notomastus latericeus.The average abundance and biomass of macrobenthos in the study area were 932.3 ind./m2and 8.2 g/m2respectively.Higher abundance distributed from Qingdao to Huangdao waters,lower abundance from Rizhao to southern waters of Rushan Bay;higher biomass was noted from southern waters of Rushan to Aoshan waters,and lower values from Rizhao to Jiaonan waters.According to the results of CLUSTER analysis,five commu-nities could be clustered at 38% similarity levels.BIOENV and RELATE analyses showed that the depth and the organic carbon were the principal factors affecting the community structures of macrobenthos.%2007-10对山东南部近岸海域36个站位进行大型底栖动物的调查.样品共鉴定出大型底栖动物129种,其中多毛类69种、软体动物15种、甲壳类35种、棘皮动物3种,其它类群7种.研究海域内 IRI指数排名前3位的是寡鳃齿吻沙蚕(Nephthys oligobranchia)、独指虫(Aricidea sp.)和背蚓虫(Notomastus latericeus).研究海域内大型底栖动物的总平均丰度为932.3个/m2,总平均生物量为8.2 g/m2.其中丰度的高值区分布于青岛-黄岛海域,低值区分布于日照及乳山湾南部海域,生物量的高值区分布于乳山湾南部-鳌山湾海域,生物量低值区分布于日照-胶南海域.在38%相似度水平上,取样站位可被划分为5个群落.BIOENV 分析和 RELATE 检验结果显示,水深和有机碳质量分数是影响大型底栖动物群落结构的主要因素.