2011年春秋季大渡河河口浮游植物群落结构特征研究  

Characteristics of Phytoplankton Community Structure in Dadu River Estuary in Spring and Autumn 2011

作　　者：王文君[1] 黄道明[1] 方艳红[1] 憨雪莹[1] 简东[1] 杨汉运[1] 谢山[1] 

机构地区：[1]水利部中国科学院水工程生态研究所,水利部水工程生态效应与生态修复重点实验室,武汉430079

出　　处：《水生态学杂志》2012年第6期69-75,共7页Journal of Hydroecology

基　　金：水利部公益性行业科研专项经费项目(200901009);国家科技支撑计划项目(2012BAC06B01)

摘　　要：对大渡河河口春秋季的浮游植物群落结构特征进行了调查,共采集到浮游植物6门、53属、157种;其中,硅藻种类最多,共109种,占总数的69.43%,其次是绿藻和蓝藻。左侧汊河和青衣江浮游植物种类较多。优势度分析显示,大渡河河口浮游植物优势种季节演替明显。浮游植物平均密度和生物量分别为469040个/L和0.9051mg/L,均以硅藻最高。浮游植物密度春季高于秋季,生物量则春季低于秋季,青衣江浮游植物密度和生物量较干流低。大渡河河口多样性指数春季平均为3.1728,秋季平均为3.3547;均匀度指数春季平均为0.5300,秋季平均为0.5749。秋季浮游植物多样性指数和优势度均高于春季,青衣江两指标均较干流低。Characteristics of phytoplankton community structure in Dadu River estuary in spring and autumn 2011 were investigated in this study. Results showed that 6 classes including 157 species were founded in Dadu River es- tuary. Among them, Bacillariophyta dominated, which had 109 species and accounted for 69.43% of the total phy- toplankton species. Chlorophyta and Cyanophyta were in the second and third place, respectively. More phyto- plankton species were observed in the left branch of Dadu River estuary and Qingyi River. The analysis result of the predominance index showed that there was a significantly seasonal change in dominated species. The average densi- ty and biomass of phytoplankton in Dadu River Estuary were 469040 ind./L and 0. 9051 mg/L, respectively. Ba- cillariophyta was the highest both in density and biomass. The density of phytoplankton in spring was higher than that in autumn, but the biomass of phytoplankton in spring was lower than that in autumn. The density and biomass in Qingyi River were lower than those in Dadu River. The average Shannon index was 3. 1728 in spring and 3. 3547 in autumn. The average Pielou＇s index was 0. 5300 in spring and 0. 5749 in autumn. The phytoplankton Shannon index and Pieloug index in autumn were higher than those in spring. And the both factors were lower in Qingyi Riv- er than those in Dadu River.

关 键 词：浮游植物 大渡河河口 群落结构 

分 类 号：Q145[生物学—生态学]