2018—2019年余姚市主要内河浮游甲壳动物群落变化特征  

Variation Characteristics of Pelagic Crustaceans Community in Main Rivers of Yuyao City from 2018 to 2019

作　　者：杨杰青 林熙戎 欧阳珑玲 陈渊戈[1] 唐峰华[1] 茅树杰 王云龙[1] 史赟荣[1] YANG Jieqing;LIN Xirong;OUYANG Longling;CHEN Yuange;TANG Fenghua;MAO Shujie;WANG Yunlong;SHI Yunrong(Key Laboratory of East China Sea Fisheries Resources Development and Utilization,Ministry of Agriculture and Rural Affairs,East China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Shanghai 200090,China;Shanghai Environment Monitoring Center,Shanghai 200235,China;Fishery Management Station of Yuyao,Ningbo 315400,China)

机构地区：[1]中国水产科学研究院东海水产研究所,农业农村部东海渔业资源开发利用重点实验室,上海200090 [2]上海市环境监测中心,上海200235 [3]余姚市渔政管理站,浙江宁波315400

出　　处：《水产科学》2022年第6期1036-1044,共9页Fisheries Science

基　　金：中国水产科学研究院科技创新团队项目(2020TD14).

摘　　要：为探明2018—2019年余姚市主要内河(余姚江、临周江、长泠江和湖塘江)浮游甲壳动物群落变化特征,于2018年和2019年2月(冬季)、5月(春季)、8月(夏季)和11月(秋季)调查8次,比较分析浮游甲壳动物种类组成、优势种、密度和生物量等参数,并采用优势度曲线和相似性分析方法,分析浮游甲壳动物种类数与累计丰度百分比,以及浮游甲壳动物群落年际、季节及空间上的差异性。调查结果显示:2018年共鉴定浮游甲壳动物39属67种,其中桡足类35种、枝角类32种;2019年共鉴定浮游甲壳动物26属46种,其中桡足类25种、枝角类21种。2018年浮游甲壳动物、桡足类和枝角类种类数高于2019年。密度和生物量年际变化不大,各年度季节排序均为春季>秋季>夏季>冬季。优势种年际更替率为78.26%。浮游甲壳动物群落结构年际差异极显著,季节上夏季两年之间群落结构差异不显著,空间上各江段两年之间均差异不显著。2019年较2018年,浮游甲壳动物群落具有一定的单一性表现,水体亦有趋于富营养化的态势。In order to further explore the variation characteristics of pelagic crustaceans community in main rivers of Yuyao city,the variations in species composition,dominant species,density and biomass were analyzed,based on the pelagic crustaceans survey data in February(winter),May(spring),August(summer)and November(autumn)of 2018 and 2019.Dominance curve analysis method was used to analyze the species numbers and its cumulative percentage of total pelagic crustaceans abundance.Analysis of similarity method(ANOSIM)was used to analyze the annual,seasonal and spatial differences in pelagic crustaceans community structure.Results showed that a total of 67 species,belonging to 39 genera,including 35 species of copepod and 32 species of cladocera,were identified in 2018.A total of 46 species,belonging to 26 genera,including 25 species of copepod and 21 species of cladocera,were identified in 2019.In 2018,the species composition,copepod numbers and cladocera numbers were higher than 2019.In 2018 and 2019,the density and biomass of spring ranked the first,autumn ranked the second,summer ranked the third,and winter ranked the last.The replacement rate of dominant species was about 78.26%.There was very significat difference in annual variation of pelagic crustaceans community at the level of 0.01.In 2018 and 2019,there was no significant difference in the annual variation of pelagic crustaceans community in summer at the level of 0.05,and the same in spatial.In 2019,the pelagic crustaceans community was featured by single species,and the environment of water quality tended to be eutrophication compared with 2018.

关 键 词：余姚 浮游甲壳动物 群落结构 年际变化 

分 类 号：S932.5[农业科学—渔业资源]