【摘要】 采用野外调查的方法,结合多维尺度分析(MDS),研究了小鹤立河水库及上游河流春季浮游植物群落结构特征。经鉴定,调查区域内共有浮游植物6门60种,均以硅藻和绿藻为主,其中河流系统以硅藻为主(59.09%);水库系统以绿藻为主(44.74%)。水库浮游植物丰度(4 878.5×104个/L)大于河流丰度(319.4×104个/L),水库生物量(2.67 mg/L)小于河流生物量(2.86 mg/L)。水库浮游植物优势种细小隐球藻(Aphanocapsa elachista)细胞数量多而个体很小。TLI综合营养指数分析表明,小鹤立河流域水质在贫、中营养之间。对浮游植物群落结构的多维(MDS)分析结果显示,水库与其上游河流系统浮游植物群落结构差异显著。更多还原

【Abstract】 An investigation on the phytoplankton was conducted in Xiaoheli River Resesvor and its upstream rivers from 12 sample stations with 60 species belonging to 6 divisions in spring,2012. Bacillariophyta accounted for most with the ratio of59. 09% in the reservoir,while Chlorophyta accounted for the most with the ratio of 44. 74% in the river. Average abundance of different sampling sites in reservoir(4 878. 5 ×104ind / L) is higher than that in the river(319. 4 ×104ind / L).Meanwhile,average biomass of different sampling sites in reservoir(2. 67 mg / L) is smaller than that in the river(2. 86mg / L). Dominant specie is Aphanocaspsa elachista existing only in the reservoir. By TLI,all sampling stations are Oligotropher-Mesotropher. By many-dimensions(MDS) analysis,there are many differences in community structure of phytoplankton between Xiaoheli river reservoir and its upstream rivers.更多还原