A comparison of zooplankton assemblages in Nansi Lake and Hongze Lake,potential influences of the East Route of the South-to-North Water Transfer Project,China  

作　　者：Kandathil Radhakrishnan DIVYA Shasha ZHAO Yushun CHEN Fei CHENG Lei ZHANG Jiao QIN Thundiparambil Sathrajith ARUNJITH V.Bjorn SCHMIDT Songguang XIE 

机构地区：[1]Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China [2]Key Laboratory of Sustainable Fisheries and Environmental Protection for Lakes of Northern Jiangsu,Huai’an Research Center,Institute of Hydrobiology,Chinese Academy of Sciences,Huai’an 223002,China

出　　处：《Journal of Oceanology and Limnology》2021年第2期623-636,共14页海洋湖沼学报（英文）

基　　金：Supported by the Service Project of Special Institute of Chinese Academy of Sciences(No.Y55Z06);the Key Project in Frontier Science of Chinese Academy of Sciences(No.QYZDB-SSW-SMC041);the National Science Foundation of Jiangsu Province,China(No.BK20141268);the National Natural Science Foundation of China(No.31400486a)。

摘　　要：Nansi Lake and Hongze Lake are both water storage lakes along the East Route of the South-to-North Water Transfer project(ESNT).Frequent changes in hydrologic properties are responsible factors for controlling the zooplankton community assemblages in both lakes,so we studied the possible influence of water transfer and environmental factors on zooplankton community structure and abundance.Zooplankton assemblages were investigated seasonally for one year in both lakes;a total of 133 and 122 zooplankton taxa were identified in Nansi Lake and Hongze Lake,respectively.The most dominant rotifer species were littoral,e.g.,Keratella tecta,Keratella valga and Lecane lunaris in Nansi Lake and Brachionus angularis,Brachionus forficula and Polyarthra vulgaris in Hongze Lake.Comparatively,Nansi Lake had a higher Shannon-Wiener diversity index value(5.13),while Hongze Lake had a higher species richness index(4.21).The average number of zooplankton across seasons in Nansi Lake(protozoa:774±63 ind./L,rotifers:4817±212 ind./L,cladocerans:896±14 ind./L,copepod:435±42 ind./L)was comparatively lower than Hongze Lake(protozoa:1238±63 ind./L,rotifers:6576±112 ind./L,cladocerans:1013±20 ind./L,copepod:534±25 ind./L).Canonical correspondence analysis identified differing environmental gradients that were most responsible for influencing zooplankton communities in the two lakes(Hongze Lake:NH4-N,total nitrogen,transparency and pH;Nansi:pH,temperature and total phosphorus).Frequent changes related to water transfer in lakes favoured the diversity of rotifers and protozoa communities.Zooplankton habitat preference,changes in community structure and opportunistic peaks and extinction of certain taxa were also observed in the study lakes.

关 键 词：zooplankton assemblage water transfer Hongze Lake Nansi Lake 

分 类 号：Q958.8[生物学—动物学]