Do physicochemical variables regulate the distribution of zooplankton communities in reservoirs dominated by filter-feeding carp?  

作　　者：胡梦红 杨丽丽 刘其根 

机构地区：[1]College of Fisheries and Life Science,Shanghai Ocean University [2]Key Laboratory of Freshwater Fishery Germplasm Resources,Ministry of Aquaculture

出　　处：《Chinese Journal of Oceanology and Limnology》2014年第2期266-277,共12页中国海洋湖沼学报（英文版）

基　　金：Supported by the Special Fund for Agro-Scientific Research in the Public Interest,the State Agriculture Ministry of China(No.201303056);the National Natural Science Foundation of China(No.31072218);the Shanghai City Board of Education Innovation Fund(No.13YZ093);the Funding Scheme for Training Young Teachers in Colleges and Universities in Shanghai(No.ZZhy12001);the Shanghai University Knowledge Service Platform Project(ZF1206)

摘　　要：The temporal and spatial distributions of zooplankton communities in the upper, middle, and lower reaches of the Xin＇anjiang Reservoir, Zhejiang, China, were investigated monthly, between 2009 and 2010. Silver carp （Hypophthalmichthys moBtrix） and bighead carp （Aristichthys nobilis） dominated the pelagic fish community of this large, deep reservoir. Cladocerans were distributed evenly throughout the reservoir. Rotifers were mainly found in the upper reaches, while copepods tended to assemble in the lower reaches. The Pearson correlation analysis and stepwise multiple regression were used to identify the major physicochemical gradients influencing community variations. Zooplankton community distributions were influenced by water temperature, dissolved oxygen, phosphorus, nitrogen, and silicon. Excess nutrients, in particular silicon, stimulated rotifer growth. Based on these findings, it is possible to use rotifer density as a bioindicator of eutrophic status in deep reservoir ecosystems.The temporal and spatial distributions of zooplankton communities in the upper,middle,and lower reaches of the Xin'anjiang Reservoir,Zhejiang,China,were investigated monthly,between 2009 and 2010.Silver carp(Hypophthalmichthys molitrix)and bighead carp(Aristichthys nobilis)dominated the pelagic fi sh community of this large,deep reservoir.Cladocerans were distributed evenly throughout the reservoir.Rotifers were mainly found in the upper reaches,while copepods tended to assemble in the lower reaches.The Pearson correlation analysis and stepwise multiple regression were used to identify the major physicochemical gradients infl uencing community variations.Zooplankton community distributions were infl uenced by water temperature,dissolved oxygen,phosphorus,nitrogen,and silicon.Excess nutrients,in particular silicon,stimulated rotifer growth.Based on these fi ndings,it is possible to use rotifer density as a bioindicator of eutrophic status in deep reservoir ecosystems.

关 键 词：temporal distribution spatial distribution ZOOPLANKTON filter-feeding carp physicochemical variables reservoir 

分 类 号：Q958.8[生物学—动物学]