Eutrophication of lakes is one of the most common pressures affecting aquatic biodiversity and ecosystem services. Poyang Lake is of great importance for maintaining regional ecological balance; however, algal blooms have become major environmental problems in this basin, and they are also caused by a variety of problems including biodiversity decline, toxin production and possibly unsafe drinking water. In this study, the community structure of phytoplankton and physicochemical parameters were investigated in different eutrophication area, Poyang Lake Basin. The results showed that the number of phytoplankton species had decreased, but the density and biomass were increased in the current period. The assemblage structure of phytoplankton showed significantly seasonal and spatial variability. The assemblage structure of phytoplankton was related to dissolved oxygen, nitrate nitrogen, chlorophyll-a and ammonium nitrogen, based on redundancy analysis. The study showed that the phytoplankton community structure was influenced by algal blooms and water quality factors. This study provides an important reference for increased biomonitoring and ecohydrological studies in this basin.

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Po阳湖流域浮游植物群落特征及其管理意义

湖泊的富营养化是影响水生生物多样性和生态系统服务的最常见压力之一。阳湖对于维护区域生态平衡具有重要意义。然而，藻华已成为该流域的主要环境问题，也是由各种问题引起的，包括生物多样性下降，毒素生产以及可能不安全的饮用水。本研究对Po阳湖流域不同富营养化地区浮游植物的群落结构和理化参数进行了研究。结果表明，当前时期浮游植物种类有所减少，但密度和生物量却有所增加。浮游植物的组装结构表现出明显的季节和空间变异性。a和铵氮，基于冗余分析。研究表明，浮游植物群落结构受藻华和水质因素的影响。这项研究为该流域加强生物监测和生态水文学研究提供了重要参考。