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引用本文:蔡永久,姜加虎,张路,陈宇炜,龚志军.长江中下游湖泊大型底栖动物群落结构及多样性.湖泊科学,2010,22(6):811-819. DOI:10.18307/2010.0602
CAI Yongjiu,JIANG Jiahu,ZHANG Lu,CHEN Yuwei,GONG Zhijun.Community structure and biodiversity of macrozoobenthos of typical lakes in the middle and lower reaches of the Yangtze River. J. Lake Sci.2010,22(6):811-819. DOI:10.18307/2010.0602
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长江中下游湖泊大型底栖动物群落结构及多样性
蔡永久1,2, 姜加虎1, 张路1, 陈宇炜1, 龚志军1
1.中国科学院南京地理与湖泊研究所, 湖泊与环境国家重点实验室, 南京 210008;2.中国科学院研究生院, 北京 100049
摘要:
2007年10月至2008年4月,对长江中下游地区四种不同类型(草型、天然养殖、施肥养殖以及城市湖泊)的10个湖泊的大型底栖动物群落结构和多样性进行研究,并分析其与水体营养状态之间的关系.研究结果表明,不同类型湖泊底栖动物的密度、生物量、多样性及特征种类均存在显著差异.草型湖泊具有最高的生物量和多样性,但密度最低,其特征种类为腹足纲动物.天然养殖湖泊生物量也较高,物种多样性处于中间水平,特征种类为河蚬、寡鳃齿吻沙蚕及苏氏尾鳃蚓.施肥养殖湖泊和城市湖泊底栖动物密度较高,并呈现出最低的物种多样性,特征种类主要是耐污能力较强的颤蚓类和摇蚊科幼虫.相关性分析表明湖泊营养状态指数与底栖动物密度呈显著正相关,而与生物量呈显著负相关,说明随着营养水平的增加,底栖动物群落逐渐被小个体的耐污种类所主导.Margalef丰富度指数及Pielou均匀度指数与营养状态指数亦呈显著负相关,反映目前长江中下游湖泊随营养水平增加底栖动物群落趋于简单化的演替趋势.
关键词:  长江中下游  浅水湖泊  底栖动物  富营养化  相似性分析
DOI:10.18307/2010.0602
分类号:
基金项目:科技部基础性工作专项"中国湖泊水质、水量和生物资源调查"(2006FY110600);国家自然科学基金项目(31070418)资助
Community structure and biodiversity of macrozoobenthos of typical lakes in the middle and lower reaches of the Yangtze River
CAI Yongjiu1,2, JIANG Jiahu1, ZHANG Lu1, CHEN Yuwei1, GONG Zhijun1
1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Abstract:
Community structure and biodiversity of macrozoobenthos and their relationships with trophic state were investigated between November 2007 and April 2008 in 10 fallow lakes, including four types of macrophyte-dominated lakes, natural cultured lakes, artificial cultured lakes and uiban lakes, in the middle and lower reaches of Yangtze River. Univariate and multivariate analysis showed that density, biomass, diversity and characteristic species differed significantly among the four type lakes. Macro-phyte-dominated lakes had the highest biomass and biodiversity and the lowest density, and were characterized by gastropods. Natural cultured lakes are intermediate diverse ccxnmunities and were characterized by Corbwula fluminea, Nephtys oligobranchia and Branchiura sowerbyi. Artificial cultured lakes and lakes presented the highest density and the lowest diversity and were domi-nated by pollutivwly with the density, whereas associated inversely with biomass, which indicated that small-size pollution-tolerant species became more dominant with increasing trophic state. Diversity indices of Maigaief and Pielou showed significantly negative correlations with trophic state index, implying the simplification macrozoobentho communities with eutrophication in fallow lakes in the middle and lower reaches of Yangtze River.
Key words:  Middle and lower reaches of Yangtze River  shallow lakes  macrozoobenthos  eutrophication  analysis of similarity
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