调水可以有效缓解水资源短缺,改善水环境条件,同时也造成未知的生态后果,特别是,长期调水后,受灾地区浮游动物群落的聚集机制将变得更加复杂。以南四湖为例,中国南水北调工程(SNWDP)东线的第二大蓄水湖,作为一个例子,研究了引水期(WDP)和非引水期(NWDP)湖泊和河口浮游动物群落的组成和多样性。进一步探索了浮游动物群落的潜在组装过程,比较了不同时期不同地区社区的稳定性。相关结果表明,引水引起的水质条件变化对浮游动物群落的影响相对较弱。在浮游动物群落的组装机制中,随机过程在WDP或NWDP中都起着更重要的作用,NWDP期间确定性过程的比例相对较高,这可能与总氮(TN)在浮游动物群落组装中的更大作用有关。网络分析和内聚力计算结果表明,湖区遗址浮游动物群落的稳定性高于河口遗址,NWDP期间的稳定性高于WDP期间的稳定性。总之,浮游动物群落的稳定性受引水活动的影响表现出一定程度的变化,但是经过相对长期的调水后,社区集会并未受到水质波动的显着影响。本研究深入了解引水对受影响湖泊生物群落的生态效应,有利于长期调水工程的管理和调节。
Water diversion can effectively alleviate water resource shortages and improve water environmental conditions, while also causing unknown ecological consequences, in particular, the assembly mechanism of
zooplankton communities in the affected areas will become more complex after long-term water transfer. Taking Nansi Lake, the second largest impounded lake along the eastern route of China\'s South to North Water Diversion Project (SNWDP), as an example, the composition and diversity of
zooplankton communities in the lake area and estuaries during the water diversion period (WDP) and non-water diversion period (NWDP) were studied. The potential assembly process of
zooplankton communities was further explored, and the stability of communities in different regions during different periods was compared. The related results indicated that the changes in water quality conditions induced by water diversion had a relatively weak impact on the zooplankton communities. In the assembly mechanism of
zooplankton communities, stochastic process played a more important role during both WDP or NWDP, and the proportion of deterministic process was relatively higher during NWDP, which may be related to the greater role of total nitrogen (TN) in the assembly of the zooplankton communities. The network analysis and cohesion calculation results showed that the stability of the zooplankton communities in the lake area sites was higher than that in the estuary sites, and the stability during NWDP was higher than that during WDP. In sum, the stability of
zooplankton communities displayed a degree of change affected by water diversion activities, but the community assembly was not significantly influenced by the water quality fluctuations after about relatively long-term water diversion. This study provides an in-depth understanding of the ecological effects of water diversion on the biological communities in the affected lake, which is beneficial to the management and regulation of long-term water diversion projects.