蠡湖鱼类群落结构及物种多样性的空间特征

为研究蠡湖渔业资源的种群组成结构特点,了解蠡湖渔业资源多样性的时空变化规律,于2007年5月至2008年4月在蠡湖设置了10个采样点,调查和分析了蠡湖渔业资源种类和优势种以及群落多样性。结果表明:调查期间,青梢红鲌(Erythroculter dabryiBleeker)和湖鲚(Coilia ectenes taihuensis)是各个监测站点的优势品种;各个站点Shannon-Wiener多样性指数(H′)介于1.26~2.89之间,依此判定蠡湖渔业资源群落的多样性和丰富度属于正常水平。渔父岛和鹿丁山以及渔父岛和水上明月站点间H′和Wilhm改进指数(H″)差异显著(P0.05),其余站点间H′差异均不显著(P0.05);10个站点间J差异均不显著(P0.05)。运用GIS软件分析,西蠡湖的生物多样性指数和均匀度指数明显高于东蠡湖(以宝界桥为界)。

Composition of Fishes and Spatial Analysis of Biodiversity in Lihu Lake

The characteristic of species composition and spatial temporal of biodiversity on fisheries resources in Lihu Lake was introducedFrom May 2007 to April 2008，fisheries resources，dominant species composition and biodiversity of community were analyzed through setting up 10 sampling stations in Lihu LakeThe results showed that Erythroculter dabryi Bleeker and Coilia ectenes taihuensis was dominant species of each sampling stationBiodiversity of each sampling station was between 1.26 and 2.89 indicated that diversity and abundance of Lihu Lake were normalThere was significant difference of biodiversity between Yufudao station and Ludingshan station and between Yufudao station and Shuishangmingyue station（P＜0.05）. GIS was applied to spatial temporal analysis of biodiversity in Lihu LakeThe result showed that biodiversity of west part of Lihu Lake was obviously higher than that of east of Lihu Lake.