长江源区浮游植物群落特征与水环境因子关系研究

Relation Between Phytoplankton Community Characteristics andWater Environmental Factors in the Source Region of Yangtze River

为研究长江源头区域河流浮游植物群落结构与水环境因子的关系,于2017年5,8,9月份和2018年5,7,9月份在长江源区进行调查分析,并对浮游植物及水环境因子进行了Pearson相关性分析和典范排序分析。结果表明,共发现浮游植物6门79种,以硅藻门和蓝藻门为主。各采样点浮游植物平均密度71.66×10^4 ind./L。典范分析表明,温度、化学需氧量、高锰酸盐指数、氨氮、总氮、溶解氧是影响长江源区河流浮游植物群落结构的主要因子。研究成果有助于了解长江源头地区浮游植物群落特征,为三江源生态保护提供数据支撑。

In order to study the relationship between phytoplankton community structure and water environment factors in the source region of the Yangtze River,we carried out surveys in the source region of the Yangtze River in May,August,September in the year 2017 and May,July and September in the year 2018.Besides,we conducted Pearson correlation analysis and Canonical ranking analysis between phytoplankton and water environmental factors.Results unveiled a total of 6 phyla 79 species of phytoplankton,mainly belongs to Bacillariophyta and Cyanophyta.The average density of phytoplankton at each sampling point was 71.66×10^4 ind./L.Canonical analysis indicated that temperature,chemical oxygen demand,permanganate index,ammonia nitrogen,total nitrogen and dissolved oxygen were major factors affecting the phytoplankton community structure in the source region of the Yangtze River.