对公河鱼的环境压力:从时间功能多样性动态的洞察力
Vanna Nuon1, Ratha Chea2, Bernard Hugueny3
1Centre de Recherche sur la Biodiversité et l'Environnement (CRBE), Université de Toulouse, CNRS, IRD, Toulouse INP, Université Toulouse 3 - Paul Sabatier (UT3), Toulouse, France; Laboratory of Freshwater Ecology (ECOFRESH), Department of Science, Faculty of Science Education, Battambang Teacher Education College (BTEC), Sangkat Ratanak, 021402, Battambang City, Cambodia; Cambodia National Mekong Committee, No. 576, National Road No. 2, Sangkat Chak Angre Krom, Khan Meanchey, Phnom Penh, 12300, Cambodia.
Journal of environmental management
|March 28, 2025
概括
公河鱼群越来越多地受到环境变化的影响,大的影响改变了功能多样性. 水平,温度和是关键的驱动因素,影响河流管理的保护战略.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 鱼类学 鱼类学 鱼类学
背景情况:
- 公河面临着严重的环境威胁,影响其多样化的鱼群.
- 了解鱼类社区对这些变化的反应对于有效的保护和管理至关重要.
- 功能多样性 (FD) 提供一种基于特征的方法来评估生态社区结构.
研究的目的:
- 调查功能多样性动态与公河环境变化之间的联系.
- 确定在四个不同的地点构建鱼群的关键环境驱动因素.
- 探索决定性和随机过程对鱼群聚集的影响.
主要方法:
- 利用基于特征的方法和对347种物种的鱼类监测数据.
- 使用标准化效果大小评估功能丰富度 (FRic) 和功能分歧 (FDiv).
- 采用通用添加模型来识别环境驱动因素和社区集会规则.
主要成果:
- 在大建设后的四个地点都观察到显著的环境变化和鱼群结构的变化.
- 确定性过程,特别是环境过,在大多数地点主导了鱼群聚集,导致FRic和FDiv的下降,除了越南地点 (VCM).
- 水位是主要的环境驱动因素,温度和总是次要因素;根据地点,FD的季节性模式有所不同.
结论:
- 环境过对公河的鱼群结构有很大的影响,大的影响和其他人为因素也发挥了作用.
- 研究结果表明,不同的生态过程 (决定性与随机性) 塑造了沿河不同地点的鱼群.
- 该研究为开发公河流域有针对性的河流管理和保护战略提供了见解.
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