巢湖底栖动物群落结构的时空变动格局研究

Studies on Spatial and Temporal Patterns of Macrozoobenthos Community Structure in Lake Chaohu

2017年夏季(7月)和秋季(10月)对巢湖大型底栖动物进行了季度性调查,共鉴定到大型底栖动物17种,隶属于3门6纲7科。巢湖优势种为霍甫水丝蚓(Limnodrilus hoffmeisteri)、正颤蚓(Tubifex tubifex)、菱跗摇蚊(Clinotanypus sp.)、红裸须摇蚊(Propsilocerus akamusi)、寡鳃齿吻沙蚕(Nephtys oligobranchira)、多毛管水蚓(Aulodrilus pluriseta)和厚唇嫩丝蚓(Teneridrilus mastix)。在Shannon-Weiner多样性指数方面,西湖心最低(0.639),中庙最高(2.044)。群落密度方面,各采样点寡毛类总密度为183±30.7ind/m^2,占比高达49.9%;水生昆虫总密度为152±28.9ind/m^2,占比为41.4%。群落生物量方面,各采样点水生昆虫总生物量为1.0329±0.2888g/m^2,占比高达84.35%,占据绝对优势。

Macrozoobenthos community of Lake Chaohu was investigated in summer and autumn in 2017. A total of 17 species were recorded,which belonged to 7 families,6 classes and 3 phylum. The dominant species in Lake Chaohu were Limnodrilus hoffmeisteri,Tubifex tubifex,Clinotanypus sp.,Propsilocerus akamusi,Nephtys oligobranchira,Aulodrilus pluriseta and Teneridrilus mastix. The Shannon-Weiner index of macrozoobenthos in Lake Chaohu was the highest at station Zhongmiao(2.044)and the lowest at Xihuxin(0.639). The mean density of oligochaete and aquatic insects in Lake Chaohu were 183±30.7ind/m^2 and 152±28.9ind/m^2,which accounted for 49.9% and 41.4%, respectively. The mean biomass of aquatic insects in Lake Chaohu was 1.0329±0.2888g/m^2,which accounted for 84.35%.