摘要
研究浮游动物群落特征,评价水质状况,为大清河流域的生态系统修复提供科学依据。2018年5月和8月,在大清河流域25个采样点采集浮游动物样品,分析种类组成、密度以及优势种,利用多样性等指数和聚类分析的方法,分析其群落特征。大清河流域水体中共调查到浮游动物18属28种,其中种数最多的为轮虫16种,占总种数的57.14%;最少的为桡足类4种,占14.29%;2次调查浮游动物平均密度分别为643.08个/L(5月)和715.20个/L(8月);优势种为前节晶囊轮虫(Asplanchna priodonta)、壶状臂尾轮虫(Brachionus urceus)、萼花臂尾轮虫(Brachionus calyciflorus)、针簇多肢轮虫(Polyarthra trigla)、直额裸腹溞(Moina rectirostris)、近邻剑水蚤(Cyclops vicinus)等。利用Shannon-Wiener指数、Pielou指数、Margalef指数和优势度指数计算大清河流域浮游动物多样性指数,结果表明大清河流域浮游动物多样性较差,综合评价其水质为中重度污染。聚类分析将大清河流域2个月25个站点分别聚为9和7个类群。
Daqing River flows across four provinces and the cities of Shanxi,Hebei,Beijing and Tianjin.With a surface area of 45131 km~2,the river plays an important role in maintaining the ecological balance and climate regulation of northern China.In this study,we characterized the zooplankton community of Daqing River and evaluated the water quality based on the results.The objective was to provide a scientific basis for restoring the Daqing River ecosystem.Zooplankton investigations were carried out in May and August of 2018 at 25 sampling sites in the Daqing River basin,focusing on species composition,density,dominant species and community diversity.A total of 28 zooplankton species belonging to 18 genera were detected,with absolute dominance by rotifera(16 species,10 genera,57.14%of the total species),followed by cladocera(6 species,5 genera,21.43%)and copepoda(4 species,3 genera,14.29%).There was not a significant difference in the average density of zooplankton between May(643.08 ind/L)and August(715.20 ind/L).Nine species were dominant during both investigations,with the dominant species in the order,rotifera>cladocera>copepoda,while the dominance degree was in the order,copepoda>rotifera>cladocera.The dominant species included Asplanvhna priodonta,Brachionus urceus,Brachionus calyciflorus,Polyarthra trigla,Moina rectirostris,Cyclops vicinus.The Shannon-Wiener diversity,Pielou evenness and Margalef richness indices of the zooplankton community in the Daqing River basin were in the respective ranges of 0.35-1.83,0.09-0.32,0.30-1.39 in May and 0.23-2.18,0.03-0.34,0.12-1.44 in August.Water quality evaluation,based on community diversity,indicated that 2%of the sites were lightly polluted,36%were moderately polluted and 62%were heavily polluted.To summarize,the pollution level in the Daqing River basin was at a medium to heavy level in 2018.
作者
陈佳林
余海军
王茜
CHEN Jia-lin;YU Hai-jun;WANG Qian(Key Laboratory of Aquatic-Ecology and Aquaculture of Tianjin,College of Fishery,Tianjin Agricultural University,Tianjin 300384,P.R.China)
出处
《水生态学杂志》
CSCD
北大核心
2021年第3期72-78,共7页
Journal of Hydroecology
基金
国家自然科学基金(31672264)。
关键词
大清河流域
浮游动物
多样性分析
群落特征
Daqing River basin
zooplankton
diversity analysis
community characteristics
