Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
Environ Sci Pollut Res Int. 2023 Nov;30(51):111344-111356. doi: 10.1007/s11356-023-30111-9. Epub 2023 Oct 9.
Identifying factors affecting phytoplankton dynamics is crucial to the management of aquatic ecosystems. A lot of scholars have conducted intensive studies on phytoplankton in lake or reservoirs, but not many studies have been conducted on diversion reservoirs. To explore the seasonal and spatial variation of phytoplankton communities and their relationship with environmental factors in the context of water diversion, a case study was carried out at XiKeng (XK) reservoir in South China. In this study, month-by-month water samples and phytoplankton were collected from this reservoir from December, 2021, to July, 2022. The results showed that the phytoplankton community was characterized by significant spatial and temporal variations. There were significant differences in phytoplankton abundance and structure in the reservoirs in terms of time. The abundance of phytoplankton cells and the proportion of Cyanobacteria in the reservoir showed a trend of increasing from autumn to spring and then decreasing from spring to summer, while the functional group evolved from S1 in autumn to SN in spring and summer. The abundance of phytoplankton was influenced by the dynamic water division and the characteristics of the reservoir itself, resulting in a spatial distribution characteristic of AIII > AII > AI. Water temperature (WT) and nutrients were the key factors driving the changes in phytoplankton abundance and community structure in the reservoir. These findings will deepen our understanding of the spatial and temporal dynamics of phytoplankton community structure in diversion reservoirs and provide a basis for freshwater water ecological management strategies.
确定影响浮游植物动态的因素对水生生态系统的管理至关重要。许多学者对湖泊或水库中的浮游植物进行了深入研究，但对引水水库的研究并不多。为了探索引水背景下浮游植物群落的季节性和空间变化及其与环境因素的关系，本研究以华南西坑(XK)水库为案例进行了研究。在本研究中，从 2021 年 12 月到 2022 年 7 月，逐月从该水库采集水样和浮游植物。结果表明，浮游植物群落具有显著的时空变化特征。在时间方面，水库中浮游植物丰度和结构存在显著差异。浮游植物细胞的丰度和蓝藻在水库中的比例呈现出从秋季到春季增加，然后从春季到夏季减少的趋势，而功能组则从秋季的 S1 演变为春季和夏季的 SN。浮游植物的丰度受到动态分水和水库自身特征的影响，导致空间分布特征为 AIII> AII> AI。水温（WT）和养分是驱动水库浮游植物丰度和群落结构变化的关键因素。这些发现将加深我们对引水水库浮游植物群落结构时空动态的理解，为淡水水生态管理策略提供依据。
