摘要
为了解后生浮游动物群落结构特征和水质现状,于2016年1月、4月、7月、10月对高邮湖后生浮游动物进行定量调查,测定各项水质理化参数,并基于全湖和各生态功能分区,采用水质综合营养状态指数、后生浮游动物优势种群组成、B/T指数对高邮湖营养状况进行多指标分析与评价。结果表明,此次调查高邮湖后生浮游动物有17科、27属、47种;其中轮虫7科、14属、28种,占总种类的59.6%;枝角类5科、7属、10种,占总种类的21.3%;桡足类5科、6属、9种,占总种类的19.1%,小型后生浮游动物(轮虫)的生物密度和种类所占比例较高,而大型后生浮游动物(甲壳动物)占比较低。后生浮游动物年均密度为1434.7个/L,年均生物量为3.2070mg/L。高邮湖水质总氮、总磷均为超标项目,全湖和各生态功能区的水质指标与后生浮游动物评价结果相吻合,表明高邮湖已经为富营养型湖泊,处于轻度富营养化阶段。
Metazoan zooplankton play an important role in nutrient cycling and energy flow in aquatic ecosystems and changes in the structure of that community reflect the status of lake nutrient dynamics.Gaoyou Lake,the sixth largest freshwater lake in China,is connected to the Hongze Lake system in the north and the Yangtze River system in the south.The lake occupies parts of three counties and one city in Jiangsu and Anhui Provinces,providing water resources and ecological services.In recent years,with industrial development,agricultural production and fish culture in the area around Gaoyou Lake,water pollution has increased and water quality has changed dramatically.In this study,a monthly investigation of the metazoan zooplankton community was carried out in Gaoyou Lake from January to December of 2016.At the same time,physical and chemical parameters of water quality were measured.The results were then use to evaluate the nutritional status of each ecological zone based on the comprehensive nutritional status index,dominant metazooplankton populations and the B/Tindex(the ratio of metazooplankton numbers between eutrophic and oligotrophic indicators).A total of 47metazoan zooplankton species were identified in Gaoyou Lake,belonging to 27genera and 17families.Among them,28rotifer species(14genera,7families)accounted for 59.6%of the total species,followed by cladocera(10species,7genera,5families)and copepods(9species,6genera,5families),accounting for 21.3%and 19.1%of the total species.The average annual density and biomass of the metazoan zooplankton community were,respectively,1434.7ind/L and 3.2070mg/L.Zooplankton of small size(rotifers)were of higher number and species richness than those of larger size(crustaceans).The TN and TP of Gaoyou Lake exceeded national water quality standards,and the comprehensive nutritional status index of water quality for the lake as a whole and each of the ecological zones were consistent with the results based on metazoan zooplankton.Both indicated that Gaoyou Lake is slightly eutroph
作者
郭刘超
吴苏舒
樊旭
胡晓东
吴沛沛
肖鹏
GUO Liu-chao;WU Su-shu;FAN Xu;HU Xiao-dong;WU Pei-pei;XIAO Peng(Jiangsu Hydraulic Research Institute,Nanjing 210017,P.R.China;Jiangdu Water Conservancy Project Management Office,Yangzhou 225200,P.R.China)
出处
《水生态学杂志》
CSCD
北大核心
2019年第6期30-36,共7页
Journal of Hydroecology
基金
江苏省自然科学基金项目(BK20141013)
江苏省科技计划项目(BM2016031)
江苏省水利科技项目(2014038,2015034,2016028)
江苏省科技厅创新能力建设计划项目(BM2018028)
关键词
高邮湖
生态功能区
后生浮游动物
水质评价
营养状况
Gaoyou Lake
ecological function areas
metazoan zooplankton
water quality evaluation
nutritional status
