Li Di, Wu Naicheng, Tang Song, Su Guanyong, Li Xuwen, Zhang Yong, Wang Guoxiang, Zhang Junyi, Liu Hongling, Hecker Markus, Giesy John P, Yu Hongxia
1State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210046 China.
Jiangsu Environmental Monitoring Center, Nanjing, Jiangsu 210036 China.
Environ Sci Eur. 2018;30(1):27. doi: 10.1186/s12302-018-0152-2. Epub 2018 Jul 28.
Eutrophication of freshwater systems can result in blooms of phytoplankton, in many cases cyanobacteria. This can lead to shifts in structure and functions of phytoplankton communities adversely affecting the quality of drinking water sources, which in turn impairs public health. Relationships between structures of phytoplankton communities and concentrations of the toxicant, microcystin-leucine-arginine (MC-LR), have not been well examined in large shallow lakes. The present study investigated phytoplankton communities at seven locations from January to December of 2015 in Tai Lake, and relationships between structures and diversities of phytoplankton communities and water quality parameters, including concentrations of MC-LR and metals, were analyzed.
A total of 124 taxa of phytoplankton were observed, and the predominant taxa were sp. and - of and sp. of . The greatest diversities of phytoplankton communities, as indicated by species richness, Simpson, Shannon-Wiener, the Berger and Parker, and the Pielou evenness indices, were observed in spring. Furthermore, productivity of phytoplankton was significantly and negatively correlated with diversities. These results demonstrated that Simpson, Shannon-Wiener, the Berger and Parker, and the Pielou evenness indices of phytoplankton communities were significantly related to trophic status and overall primary productivity in Tai Lake. In addition, temperature of surface water, pH, permanganate index, biochemical oxygen demand, total phosphorus, arsenic, total nitrogen/total phosphorous ratio, and MC-LR were the main factors associated with structures of phytoplankton communities in Tai Lake.
The present study provided helpful information on phytoplankton community structure and diversity in Tai Lake from January to December of 2015. Our findings demonstrated that Simpson, Shannon-Wiener, the Berger and Parker, and the Pielou evenness indices could be used to assess and monitor for status and trends in water quality of Tai Lake. In addition, MC-LR was one of the main factors associated with structures of phytoplankton communities in Tai Lake. The findings may help to address important ecological questions about the impact of a changing environment on biodiversity of lake ecosystems and the control of algae bloom. Further studies are needed to explore the relationship between MC-LR and phytoplankton communities in the laboratory.
淡水系统的富营养化会导致浮游植物大量繁殖，在许多情况下是蓝藻。这可能导致浮游植物群落的结构和功能发生变化，对饮用水源质量产生不利影响，进而损害公众健康。在大型浅水湖泊中，浮游植物群落结构与有毒物质微囊藻毒素 - 亮氨酸 - 精氨酸（MC - LR）浓度之间的关系尚未得到充分研究。本研究于2015年1月至12月对太湖七个地点的浮游植物群落进行了调查，并分析了浮游植物群落的结构和多样性与水质参数（包括MC - LR和金属浓度）之间的关系。
共观察到124种浮游植物分类群，主要分类群为……（此处原文部分分类群名称未完整给出，无法准确翻译）。从物种丰富度、辛普森指数、香农 - 维纳指数、伯杰和帕克指数以及皮洛均匀度指数来看，浮游植物群落的多样性在春季最高。此外，浮游植物的生产力与多样性显著负相关。这些结果表明，浮游植物群落的辛普森指数、香农 - 维纳指数、伯杰和帕克指数以及皮洛均匀度指数与太湖的营养状态和总体初级生产力显著相关。此外，地表水温度、pH值、高锰酸盐指数、生化需氧量、总磷、砷、总氮/总磷比以及MC - LR是与太湖浮游植物群落结构相关的主要因素。
本研究提供了2015年1月至12月太湖浮游植物群落结构和多样性的有用信息。我们的研究结果表明，辛普森指数、香农 - 维纳指数、伯杰和帕克指数以及皮洛均匀度指数可用于评估和监测太湖水质状况及趋势。此外，MC - LR是与太湖浮游植物群落结构相关的主要因素之一。这些发现可能有助于解决关于环境变化对湖泊生态系统生物多样性的影响以及藻类水华控制的重要生态问题。需要进一步开展研究以在实验室中探索MC - LR与浮游植物群落之间的关系。
