Lu Quanfeng, Liu Xiongjun, Qiu Xuemei, Liang Tao, Chen Jinping, Zhao Shuai, Ouyang Shan, Jin Binsong, Wu Xiaoping
School of Life Sciences Nanchang University Nanchang China.
Guangdong Provincial Key Laboratory of Conservation and Precision Utilization of Characteristic Agricultural Resources in Mountainous Areas School of Life Science Jiaying University Meizhou China.
Ecol Evol. 2021 Dec 15;11(24):17885-17900. doi: 10.1002/ece3.8353. eCollection 2021 Dec.
Anthropogenic habitat alteration interferes the natural aquatic habitats and the system's hydrodynamics in the Yangtze River floodplain lakes, resulting in a serious decline in freshwater biodiversity. Zooplankton communities possess major position in freshwater ecosystems, which play essential parts in maintaining biological balance of freshwater habitats. Knowledge of processes and mechanisms for affecting variations in abundance, biomass, and diversity of zooplankton is important for maintaining biological balance of freshwater ecosystems. Here, we analyzed that the temporal and spatial changes in the structure of zooplankton community and their temporal and spatial variations respond to changes in environmental factors in the middle reach of Yangtze River floodplain lakes. The results showed that zooplankton samples were classified into 128 species, and Rotifera was the most common taxa. Significant seasonal differences were found among the abundance and diversity of zooplankton. Similarly, we also found significant seasonal differences among the biomass of zooplankton functional groups. The spatial turnover component was the main contributor to the β diversity pattern, which indicated that study areas should establish habitat restoration areas to restore regional biodiversity. The NMDS plot showed that the structure of zooplankton community exhibited significant seasonal changes, where the community structure was correlated with pH, water temperature, water depth, salinity, total nitrogen, chlorophyll-, and total phosphorus based on RDA. This study highlights that it is very important to ensure the floodplain ecosystem's original state of functionality for maintaining the regional diversity of the ecosystem as a whole.
人为栖息地改变干扰了长江河漫滩湖泊的自然水生栖息地和系统水动力，导致淡水生物多样性严重下降。浮游动物群落在淡水生态系统中占据主要地位，在维持淡水栖息地的生物平衡中发挥着重要作用。了解影响浮游动物丰度、生物量和多样性变化的过程和机制，对于维持淡水生态系统的生物平衡至关重要。在此，我们分析了长江河漫滩湖泊中游浮游动物群落结构的时空变化及其时空变异对环境因子变化的响应。结果表明，浮游动物样本共鉴定出128种，轮虫是最常见的类群。浮游动物的丰度和多样性存在显著的季节差异。同样，我们还发现浮游动物功能类群的生物量也存在显著的季节差异。空间周转成分是β多样性格局的主要贡献者，这表明研究区域应建立栖息地恢复区以恢复区域生物多样性。非度量多维尺度分析图显示，浮游动物群落结构呈现出显著的季节变化，基于冗余分析，群落结构与pH值、水温、水深、盐度、总氮、叶绿素-a和总磷相关。本研究强调，确保河漫滩生态系统的原始功能状态对于维持整个区域生态系统的多样性非常重要。
