作 者：
白海锋;王丰;张星朗;袁永锋;问思恩;沈红保;李瑞娇;张军燕
摘 要：
通过研究浮游动物的种类组成、现存量及多样性,分析其群落结构特征和水质状况,为黄河兰州段水生态系统健康评价和渔业管理提供基础数据,于2014年秋季(11月)在黄河兰州市区段设定7个调查断面,市区上游工业集聚区设置3个断面(H1-H3),中游人口集聚区设置3个断面(H4-H6),下游人类活动较少区设置1个断面(H7),每个断面设3个采样点,共计21个采样点,进行浮游动物群落调查。结果表明,浮游动物共检出4大类、27种(属),其中原生动物9种(属),占总种(属)的33.3%,轮虫10种(属),占37.1%,枝角类5种(属),占18.5%,桡足类3种(属),占11.1%,种类组成主要以轮虫和原生动物为主。浮游动物密度为1.88~11.09个/L,均值为4.64个/L;生物量为1.3~4.4μg/L,均值为2.5μg/L。浮游动物优势种为5种(属),以小口钟虫(Vorticella microstoma)的优势度最高(0.539)。Shannon-Weiner多样性指数、Pielou均匀度指数和Margalef丰富度指数平均值分别为1.89、0.58和1.94。通过浮游动物密度聚类分析,7个采样断面的浮游动物可分为2大类群。根据物种多样性指数对水质进行评价,黄河兰州市区段水质处于轻-中度污染。
译 名：
Characteristics of Zooplankton Community Structure for the Yellow River in Lanzhou City
作 者：
BAI Hai-feng;WANG Feng;ZHANG Xing-lang;YUAN Yong-feng;WEN Si-en;SHEN Hong-bao;LI Rui-jiao;ZHANG Jun-yan;Yellow River Fisheries Institute,CAFS;Liaoning Provincial Key Laboratory for Hydrobiology,College of Fisheries and Life Science,Dalian Ocean University;
关键词：
Lanzhou section of the Yellow River;;zooplankton;;community structure
摘 要：
The Yellow River in Lanzhou City flows 78 km through four districts and one town,with petrochemical enterprises and residential areas distributed in the middle-upper reaches and much less human disturbance in the lower reach. Zooplankton is a good indicator of river water quality. The urbanized section of the Yellow River was studied in this investigation and species composition,biomass,zooplankton diversity and community structure were determined to assess water quality. The results will provide a base line for continued evaluation of aquatic ecosystem health and fishery management and also updates data from the 1990' s investigation of the Lanzhou section of the Yellow River. Zooplankton sampling was carried out in November of 2014 along seven transects with three sampling sites at each transect: transects H1- H3 were located upstream( industrial),H4- H6 in the middle reaches( residential) and H7 downstream( less developed). A total of 27 phytoplankton species from 4 taxa were observed; 9species( genera) of protozoa,10 species( genera) of rotifera,5 species( genera) of cladocera and 3 species of copepoda,accounting,respectively,for 33. 3%,37. 1%,18. 5% and 11. 1% of the total species. Zooplankton species composition was dominated by rotifera and protozoa. Zooplankton density ranged from 1. 88 ind / L to11. 09 ind / L,with an average value of 4. 64 ind / L and biomass ranged from 1. 3 μg / L to 4. 4 μg / L,with an average value of 2. 5 μg / L. Five dominant species( genus) of zooplankton were recorded and Vorticella microstoma was the most dominant( 0. 539). The Shannon-Weiner diversity index( H'),Pielou evenness index( J) and Margalef richness index( D) of the zooplankton community were 1. 89,0. 58 and 1. 94,respectively. Cluster analysis,based on the density of zooplankton,showed the seven transects were clustered into two groups: H1- H6 transects in one group and H7 transect in the other. Water quality in the Yellow River flowing by Lanzhou city is lightly-moderately polluted according to the species diversity index. To improve water quality in the Lanzhou section of the Yellow River,it will be necessary to strengthen pollution control and management.
