Spatial–Seasonal Shifts in Phytoplankton and Zooplankton Community Structure Within a Subtropical Plateau Lake: Interplay with Environmental Drivers During Rainy and Dry Seasons

作者：Chengjie Yin, Li Gong, Jiaojiao Yang, Yalan Yang, Longgen Guo · 发表于：Fishes · 年份：2025 · DOI：10.3390/fishes10070343 · 被引用次数：4 · 研究领域：Aquatic Ecosystems and Phytoplankton Dynamics、Marine and coastal ecosystems、Fish biology, ecology, and behavior

Subtropical plateau lakes, which are distinguished by their elevated altitudes and subtropical climates, display distinct ecological dynamics. Nevertheless, the spatial and seasonal variations in the plankton community structure, as well as their interactions with environmental factors, remain inadequately understood. This study investigated the alterations in the phytoplankton and zooplankton community structure across different geographical regions (southern, central, and northern) and seasonal periods (rainy and dry) in Erhai lake, located in a subtropical plateau in China. The results indicated that the average values of total nitrogen (TN), total phosphorus (TP), chlorophyll-a (Chla), pH, and conductivity are significantly higher during the rainy season in comparison to the dry season. Furthermore, during the rainy season, there were significant differences in the concentrations of TN, TP, and Chla among the three designated water areas. Notable differences were also observed in the distribution of Microcystis, the density of Cladocera and copepods, and the biomass of copepods across the three regions during this season. Conversely, in the dry season, only the biomass of Cladocera exhibited significant variation among the three water areas. The redundancy analysis (RDA) and variance partitioning analysis demonstrated that the distribution of plankton groups (Cyanophyta, Cryptophyta, and Cladocera) is significantly associated with TN, Secchi depth (SD), and Chla during th...