2010年秋季大渡河河口浮游植物群落结构与环境因子的关系

Structure of Phytoplankton Community and Its Relationship with Environment Factors in Daduhe Estuary in Autumn 2010

根据2010年9月对大渡河河口浮游植物与水环境的调查,分析大渡河河口浮游植物的分布特征及其与水环境因子的关系。结果表明,2010年秋季共鉴定浮游植物6门61属127种,优势种为变异直链藻、钝脆杆藻、尖针杆藻、缢缩异极藻和小颤藻等;浮游植物密度变化范围为102 960～290 160个/L,生物量变化范围为0.0772～1.9717 mg/L。聚类分析表明大渡河河口河道生境分为5种类型,浮游植物种类组成、现存量分布与生境类型关系密切,但浮游植物与水质因子相关关系不显著。

The data obtained in the Dadu River Estuary during Sep.in 2010 was analyzed for understanding the distribution features of phytoplankton and its relations with the environmental factors.Total 6 phylum,61 genera and 127 species of phytoplankton were identified.The main species were Melosira varians,Fragilaria capucina,Synedra acus,Gomphonema constrictum and Oscillatoria tenuis.The phytoplankton density ranged from 102 960 to 290 160 ind./L,and the phytoplankton biomass ranged from 0.0772 to 1.9717 mg/L.According to cluster analysis,the habitat of Dadu River Estuary was divided into 5 categories.The phytoplankton species composition and biomass distribution had close relationship with the habitat type,while the phytoplankton and water quality factors had no significant relationship.