摘要
2012年春季对长湖海子湖浮游植物群落结构及其主要水环境指标进行调查,同时运用典范对应分析方法 （CCA）对浮游植物与环境因子的关系进行分析。结果表明,海子湖共检测到浮游植物93种（含变种和变型）,其中绿藻（Chlorophyta）最多,占46.76%,其次为硅藻（Bacillariophyta）和蓝藻（Cyanophyta）,分别为22.65%和15.00%;浮游植物优势种共6种,其中小球藻（Chlorella vulgaris）优势度高达0.36;浮游植物丰度在86.21×105~410.12×105个/L,平均为232.85×105个/L。多样性指数为1.82~3.28,均匀度指数为0.40~0.63。根据浮游植物丰度水平、优势度以及群落多样性指数等生物学指标进行综合评价,海子湖处于重度富营养化状态。CCA分析表明,浮游植物空间分布主要受到硝酸盐氮、化学需氧量、叶绿素以及磷酸盐等环境因子的影响,主要影响因素为海子湖地形、人为干扰因素以及水动力学相关参数。
Community structure of phytoplankton and the associated environmental factors were investigated in Haiz -ihu, Changhu Lake in the spring of 2012, and their relationship was also analyzed by canonical correspondence a-nalysis(CCA).Results showed that 93 species of phytoplankton were identified , among which Chlorophyta accoun-ted for 46.76%, followed by Bacillariophyta (22.65%)and Cyanophyta (15.00%).There were 6 dominant spe-cies and the most dominant species was Chlorella vulgaris with the dominance index of 0.36.The phytoplankton a-bundance ranged from 86.21 ×105 to 410.12 ×105 cells/L with the average value of 232.85 ×105 cells/L.Biodi-versity index and evenness index were 1.82-3.28 and 0.40-0.63, respectively.As a result, the water in Haiz-ihu was in a state of severe eutrophication according to the level of phytoplankton abundance , as well as the degree of dominance and the diversity index .Canonical correlation analysis ( CCA) suggested that NO 3-N, COD, Chl.a, PO4-P were the main environmental factors which affected the spatial distribution of phytoplankton community , meanwhile , geographical feature , human activities and hydrodynamic features were also the important influencing factors.
出处
《水生态学杂志》
北大核心
2014年第2期56-62,共7页
Journal of Hydroecology
基金
"十二.五"国家科技支撑计划项目(2012BAD25B08-03)
长江大学"大学生创新创业训练项目"
