摘要
2017年3月至2018年12月,在崇明明珠湖设置5个采样点调查研究了底栖动物群落结构的时空变化及其与环境因子的关系。共采集到25种底栖动物,霍甫水丝蚓(Limnodrilus hoffmeisteri)、中国长足摇蚊(Tanypus chinensis)和黄色羽摇蚊(Chironomus plumosus)是优势种,三者共占总密度和生物量的80.4%和72.8%。底栖动物物种组成在季节和空间上均不存在显著差异。年均密度和生物量分别为1 116.8 ind./m^2和3.53 g/m^2。密度在年份、季节和站点间不存在显著差异,生物量仅存在显著的季节变化;Shannon多样性指数、均匀度指数和优势度指数均仅存在显著的空间变化,丰富度指数无显著的年际、季节和空间差异。生物量与亚硝态氮、高锰酸盐指数显著正相关,Shannon多样性指数、丰富度指数与高锰酸盐指数和水深显著负相关、优势度指数与它们显著正相关,均匀度指数与水深负相关,密度与水深正相关。Shannon多样性指数显示明珠湖处于中污染状态,与10年前相比水质无明显变化。
Macrozoobenthos was monthly sampled at 5 stations of Mingzhu Lake in Chongming Island of Shanghai, China from March, 2017 to December, 2018. The temporal and spatial variations of the structural characteristics of macroinvertebrate community and its relationship with environmental factors were studied. A total of 25 species were collected, and Limnodrilus hoffmeisteri, Chironomus plumosus, Tanypus chinensis dominated the community. The three dominant species contributed 80.4% to the density and 72.8% to the biomass of the community. There were no significant differences in species composition of the community between seasons and among stations. The density and biomass were 1116.8 ind./m2 and 3.53 g/m2, respectively. The density did not differ yearly, seasonally and spatially, and the biomass differed only seasonally. The spatial rather than yearly and seasonal differences in Shannon diversity(H′), evenness(J) and dominance(λ) indices were observed, and no spatial and temporal variations in richness(R) index were found. The biomass was significantly and positively correlated to nitrite nitrogen(NO2-N) and permanganate index(CODMn). The H′ and R were significantly and negatively correlated to water depth(WD) and CODMn, and the λ was significantly and positively correlated to WD and CODMn. Significantly negative relationship between J and WD and positive one between density and WD were found. The H′ indicated that Mingzhu Lake was moderately polluted, and its pollution level has not changed significantly from 10 years ago to now.
作者
乔雪
刘其根
陈丽平
胡忠军
QIAO Xue;LIU Qigen;CHEN Liping;HU Zhongjun(National Demonstration Center for Experimental Fisheries Science Education,Shanghai Ocean University,Shanghai 201306,China;Shanghai Engineering Research Center of Aquaculture,Shanghai Ocean University,Shanghai 201306,China;Centre for Research on Environmental Ecology and Fish Nutrition,Ministry of Agriculture and Rural Affairs,Shanghai Ocean University,Shanghai 201306,China)
出处
《上海海洋大学学报》
CAS
CSCD
北大核心
2020年第5期699-708,共10页
Journal of Shanghai Ocean University
基金
上海市科学技术委员会科研计划项目(15320502000)
国家重点研发计划(2017YFC0506003)
上海高校知识服务平台上海海洋大学水产动物遗传育种中心项目(ZF1206)。
关键词
明珠湖
底栖动物
群落结构
多样性
水质评价
Mingzhu Lake
macrozoobenthos
community structure
diversity
water quality evaluation
