摘要
作为建立中国水环境生态学基准的基础性工作,于2011年6月,按照相关规范,对大辽河水系各河段的浮游动物群落结构和水生态状况进行了调查。结果表明:调查期间大辽河水系共检出59种或变种,其中以轮虫类占优势,占总种类数的84.75%,不同采样点的密度从8.63个·L-1至2292.06个·L-1不等,平均值为628.97个·L-1;主要优势种是龟甲轮虫属(Keratella)和臂尾轮虫属(Brachionus)的种类;共检出污染指示种28种,其中β-中污带指示种居多,有11种,占所有指示种的40%;Shannon指数为2.33～3.93,Margalef丰富度指数为2.84～9.42,Pielou均匀度指数为0.59～0.97;综合水体中后生浮游动物的密度、优势种类、指示种和生物多样性指数评价表明,大辽河水系处于富营养化状态、中等程度污染水平。相比前些年的资料,水生态状况有所好转。
As a basic work for establishing China ecological criteria of water environment, an investigation was conducted on the metazoan zooplankton community structure and aquatic ecology in the Daliaohe River in June 2011, based on the relevant guidelines. A total of 59 metazoan zoo- plankton species were recorded, most of which belonged to Rotifera, occupying 84.75% of the total. The total density of the metazoan zooplankton at different sampling sites varied from 8.63 to 2292.06 ind ~ L-1, with an average of 628.97 ind ~ L-l and dominated by rotifers. At all sites, Brachionus and Keratella were the dominant species. A total of 28 species as water pollution indi- cators were detected, among which, 11 species belonged to [3-mesosaprobie species, occupying 40%. The Shannon index of the metazoan zooplankton community was 2.33-3.93, Margalef in- dex was 2.84-9.42, and Pielou index was 0.59-0.97. Based on this investigation, it was con- sidered that the Daliaohe River was in eutrophic situation and moderate pollution level. As com- pared with the previous data, the aquatic ecosystem situation of the River was somewhat im- proved.
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第2期389-395,共7页
Chinese Journal of Ecology
基金
国家重大科技水专项(2012ZX07501-003)资助
