Characteristics and influencing factors of zooplankton community in theinto-lake rivers of Dishui Lake,Shanghai
LIU Maodong
YUAN Lin
XUE Junzeng
CHEN Chong
CHEN Jiajie
HU Qianye
Abstract：In order to explore the zooplankton community structure and its influencing factors in the in-to-lake rivers of Dishui Lake,zooplankton and water quality at 12 points in 4 into-lake rivers of Dishui Lake were investigated from Dec.2018 to Nov.2019.A total of 79 species of zooplankton were identi-fied in this survey,which included 48 species of rotifers,16 species of cladocerans and 15 species of co-pepods.There were 11 dominant species of zooplankton,which included 8 species of rotifers and 3 spe-cies of copepods.The dominant species each season were Brachionus calyciflorus,Keratella valga,nauplii and Polyarthra trigla.There were significant seasonal and regional differences in zooplankton in the into-lake rivers of Dishui Lake.The density and biomass were high in autumn and low in winter.The zooplankton diversity decreased from Neilian River to Wailian River to Zhonglian River and finally to the lake entrance.Redundancy analysis(RDA)showed that chlorophyll a(Chl-a),nitrate nitrogen(NO3-),ammonia nitrogen(NH3-N)and permanganate index(COD Mn)were the main environmen-tal factors affecting the temporal and spatial changes of zooplankton community structure.The evalua-tion of zooplankton and water physical and chemical factors revealed different results.Moderate inter-ference increased the diversity of zooplankton community.Therefore,when investigating and evalua-ting the water body,it is necessary to combine zooplankton with the physical and chemical factors of the water body in order to fully understand the state of the water body.
Keywords：zooplanktoncommunity characteristicsenvironmental factorspatiotemporal distribution
Publication Date：2025-04-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：11( 74-84 )