Structure of phytoplankton community and its relationship with environment factors in Daduhe Estuary in autumn 2010
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

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.