太湖梅梁湾和贡湖湾浮游甲壳动物群落结构及其与环境因子的相互关系

doi:10.11870/cjlyzyyhj2014Z1012

长江流域资源与环境 >> 2014, Vol. 23 >> Issue (s): 81-.doi: 10.11870/cjlyzyyhj2014Z1012

太湖梅梁湾和贡湖湾浮游甲壳动物群落结构及其与环境因子的相互关系

李娟，温周瑞，李庚辰，张敏

（1.华中农业大学水产学院，淡水水产健康养殖湖北省协同创新中心，湖北武汉 430070；
2.湖北省水产科学研究所，湖北武汉 430070）

出版日期:2014-11-26

RELATIONSHIP BETWEEN CRUSTACEAN ZOOPLANKTON COMMUNITY STRUCTURE AND AQUATIC ENVIRONMENTAL FACTORS OF MEILIANG AND GONGHU BAY IN LAKE TAIHU

LI Juan1 ，WEN Zhourui2， LI Gengchen1， ZHANG Min1

（1.College of Fisheries,HuaZhong Agricultural University,Freshwater Aquaculture Collaborative Innovation Center of Hubei Province,Wuhan 430070,China; 2.Hubei Fishery Science Institute,Wuhan 430070,China

Online:2014-11-26

摘要/Abstract

摘要：

为了探明太湖梅梁湾和贡湖湾水体中浮游甲壳动物群落结构的时空变化特征及其与水环境因子的相互关系，运用冗余分析（Redundancy analysis，RDA）对2004年11月至2005年10月期间测定的太湖的两个典型湖湾的浮游甲壳动物的密度、生物量数据与水环境因子进行多元统计分析。结果表明：梅梁湾和贡湖湾水体中营养盐含量存在时空差异。在季节变化上，冬春季节氮含量较高，夏秋季节磷含量较高；在空间变化上，由于受到周边污染物质输入的影响，梅梁湾各种形态氮磷营养盐含量显著高于贡湖湾。两个湖湾共鉴定出浮游甲壳动物19种，枝角类12种，桡足类7种，种属组成基本相同，其中，象鼻溞（Bosmina）是第一优势种。梅梁湾和贡湖湾的浮游动物也存在时空差异性，春季以大型的溞属（Daphnia）为主，夏秋季以小型的浮游甲壳动物如象鼻溞（Bosmina）为主。浮游甲壳动物总的密度和生物量会随营养盐水平的升高而增加，但对各水环境因子的响应会随种属不同而存在差异。温度、叶绿素a和营养盐水平是影响浮游甲壳动物群落结构和时空变化特征的主要因子。浮游甲壳动物生物量会随温度升高而增加，叶绿素a也与其生物量呈正相关，并且在藻类快速生长季节，更有利于小型浮游甲壳动物的生长

Abstract:

Lake Taihu is a large shallow lake of the Yangtze River,one of China's five largest freshwater lakes.Since 1980s,the trophic state of Lake Taihu changed from oligotrophic to meso/eutrophic conditions due to humaninduced pressures.Crustacean zooplankton has long been used as an indicator of lake trophic level,which plays an extremely important role in water ecosystems.Sensitivity and adaptability to different environments vary from species to species,which lead to different response patterns.It has important application value to detect the water environmental quality evaluation effectively.In this paper,redundancy analysis (RDA) was employed to study the relationships between crustacean zooplankton community structure and temporalspatial variations of water environmental factors in Meiliang and Gonghu Bay in Lake Taihu from November,2004 to October,2005.The results showed that temporalspatial differences existed in nutrient concentrations between Meiliang and Gonghu Bay.It had relatively higher nitrogen concentrations in lake water in winter and spring,while higher phosphorus concentrations in summer and autumn.The trophic levels were significantly higher in Meiliang Bay than in Gonghu Bay,due to different nutrient inputs from the surrounding rivers.Nineteen species (12 species of cladocerans,7 species of copepods) of crustacean zooplankton were identified.There were no significant differences in species composition,and Bosmina spp.was the first dominant species of crustaceans in Meiliang and Gonghu Bay.Temporalspatial differences of crustacean zooplankton also existed in Meiliang and Gonghu Bay.In spring,the dominant species were large body crustaceans such as Daphnia spp.,while small individuals such as Bosmina and copepod larvae dominated in summer.Temporalspatial variations and community structure of crustacean zooplankton were mainly affected by temperature,chlorophylla and nutrient concentrations in lake waters.Correlation analysis indicated positive relationships between total biomass and density of crustacean zooplankton and temperature,chlorophylla and nutrient concentrations.RDA analysis suggested that different species showed different response characteristics to aquatic environmental factors

李娟，温周瑞,李庚辰,张敏. 太湖梅梁湾和贡湖湾浮游甲壳动物群落结构及其与环境因子的相互关系[J]. 长江流域资源与环境, 2014, 23(s): 81-.

LI Juan1 ，WEN Zhourui2， LI Gengchen1， ZHANG Min1. RELATIONSHIP BETWEEN CRUSTACEAN ZOOPLANKTON COMMUNITY STRUCTURE AND AQUATIC ENVIRONMENTAL FACTORS OF MEILIANG AND GONGHU BAY IN LAKE TAIHU[J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2014, 23(s): 81-.

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