从确定性到随机性:水库操作通过调解营养和水文制度来改变植物浮游生物的组装过程
Daqing Zeng1, Ning Liao2, Linglei Zhang1
1State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, 610065, China.
Environmental research
|February 28, 2026
概括
水库运作通过改变水流和营养物质来改变植物浮游生物群落. 这项研究揭示了这些变化如何增强随机生态过程而不是可预测的生态过程,影响水生生态系统.
科学领域:
- 生态生态学 生态生态学
- 临界技术 临界技术
- 环境科学 环境科学
背景情况:
- 水库运作会造成环境异质性,影响水力动力学和营养系统.
- 水库监管对浮游植物社区聚集过程的影响尚未完全理解.
研究的目的:
- 调查水库调节如何驱动植物浮游生物的继承并改变社区集会过程.
- 了解水库运作与浮游植物动态之间的机械联系.
主要方法:
- 综合长期现场监测数据 (2015-2023) 与3D水力动力运输模拟.
- 分析了植物浮游生物群,主导物种和生物质的变化.
- 使用中立社区模型和随机性比率,量化社区集会过程中的变化.
- 采用结构方程建模来识别关键因果路径.
主要成果:
- 观察到主导植物浮游生物从Dinophyta转向绿藻的显著转变 (生物质从<10%增加到96%).
- 水库运营减少了30%的水停留时间 (WRT),增加了170%的总 (TP).
- 证明了社区集会从确定性到随机性主导地位的转变,中性模型的解释能力从21.2%增加到60.8%.
结论:
- 水库运营显著改变了浮游植物社区聚集机制.
- 由于WRT和TP度的变化,减少了限和增强了随机过程.
- 提供了优化水库运营以管理浮游植物群落的机制基础.
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