应用生态学报2013，Vol.24Issue(8)：2353-2359,7.
长江口及其毗邻海域鱼类群落优势种生态位宽度与重叠
Ecological niche breadth and niche overlap of dominant species of fish assemblage in Yangtze River estuary and its adjacent waters
摘要
Abstract
Based on the fishery resources data from the bottom trawl surveys conducted on the R/V Beidou in the Yangtze River estuary and its adjacent waters in June,August and October of 2006,the index of relative importance (IRI) was measured to determine the dominant species of fish assemblage,and the niche indicators and their seasonal variations of the dominant species were analyzed.A total of 10 dominant species in the 3 survey cruises were recorded,which were divided into two groups by the Bray-curtis similarity clustering and non-metric multidimensional scaling (MDS) analysis,with a significant seasonal variation of niche breadth and niche overlap.One group included Engraulis japonicus,Champsodon capensis,and Acropoma japonicum,whose niche breadth and niche overlap were larger in summer than in autumn,with a migration from the Yangtze River estuary and its adjacent waters to outer deeper waters,while the other group included Trichiurus haumela,Chaeturichthys stigmatias,Apogon lineatus,Larimichthys polyactis,Psenopsis anomala,Argyrosomus argentatus,and Benthosema pterotum,whose niche breadth and niche overlap were larger in autumn than in summer,with a reverse migration from southern Yellow Sea and northern East China Sea to the Yangtze River estuary and its adjacent waters.The different migration direction of the two groups was related to their ecological habits and environmental factors.关键词
底拖网调查/相对重要性指数/优势种/生态位/长江口Key words
bottom trawl survey/index of relative importance (IRI)/dominant species/ecological niche/Yangtze River estuary分类
农业科技引用本文复制引用
李显森,于振海,孙珊,金显仕..长江口及其毗邻海域鱼类群落优势种生态位宽度与重叠[J].应用生态学报,2013,24(8):2353-2359,7.基金项目
国家重点基础研究发展计划项目(2011CB409805)和'泰山学者'建设工程专项(2008-67)资助. （2011CB409805）
