澜沧江小湾库区2017-2019夏季浮游植物功能群特征及其环境驱动因子

为探究澜沧江小湾库区夏季浮游植物功能群的特征及其关键驱动因子,于2017-2019年8月进行采样调查.采用浮游植物功能群(FG)、冗余分析以及Pearson相关分析对数据进行分析.结果 表明:调查共鉴定出浮游植物7门71种,其中绿藻门种类最多(34种,占比47.89％);依据FG分类法将鉴定出的71种藻类归纳分为23个...

Characteristics of phytoplankton functional groups and their environmental drivers in Xiaowan Reservoir area of Lancang River during the summer of 2017-2019

To explore the characteristics and key driving factors of phytoplankton functional groups in Xiaowan Reservoir area of Lancang River,a survey was conducted in August during 2017 to 2019.Data were analyzed by using functional groups classification,redundancy analysis and Pearson correlation analysis.A total of 71 species of phytoplankton from 7 phyla were identified,among which chlorophyta were the most phytoplankton species(34 species,accounting for 47.89%).The 71 species were classified into 23 functional groups according to functional group classification.The top 5 important functional groups were identified according to the dominance index(>0.2).The identities of important functional groups showed interannual variations.Results of the correlation analysis between functional groups and environmental factors showed that nitrate and ammonium were the main limiting factors in Xiaowan Reservoir,and the reservoir area was limited by nitrogen from 2017 to 2019.Results of comprehensive analysis showed that the characteristics of phytoplankton functional groups were consistent with the changes of water environmental factors.Xiaowan Reservoir was generally at the state of moderate eutrophication to eutrophication.The habitat characteristics of Xiaowan Reservoir area could be well indicated by phytoplankton functional groups.