从碎片化到恢复:水电对中国东江河的河流连接和鱼类多样性保护的影响
Huifeng Li1,2,3, Yuefei Li1,2,3, Lin Wang4,5
1Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380, China.
Animals : an open access journal from MDPI
|September 27, 2025
概括
由于大建设,东江河的息地连接性下降了91%,恢复的关键通行值为0.8. 优先考虑像江丹这样的重点水对于有效的生态治理至关重要.
科学领域:
- 河流生态 河流生态
- 保护科学 保护科学
- 环境管理环境管理
背景情况:
- 布式水对河流生态系统产生重大影响.
- 息地连接对于鱼类迁移和生物多样性至关重要.
- 东江河经历了大量的水开发,影响了其生态健康.
研究的目的:
- 量化东江河布大系统的息地连接指数 (DCI).
- 为了确定大通道性和连接恢复之间的关系.
- 确定关键水,以优先考虑生态恢复工作.
主要方法:
- 居住地连接指数 (DCI) 的量化.
- 对大建设和连接变化的时间序列分析.
- 对大通行能力影响的空间异质性分析.
- 鱼类社区调查以评估物种组成和迁徙状况.
主要成果:
- DCI显示了对大通道性 (p) 的非线性反应,在p = 0.8.8以上呈指数级增长.
- 自然状态的DCI在1970年至2020年间下降了90.99%,而2000-2010年出现了78.14%的损失.
- 提高关键节点 (例如,建丹大) 的通行能力,比其他节点 (例如,苏莱大) 提高了显著的DCI.
- 鱼类调查显示,本地通用居民物种占主导地位,迁徙鱼类的存在有限.
结论:
- 0.8的水通行值对于有效的息地连接恢复至关重要.
- 优先考虑在空间异质的重点水上的干预,对于有效的生态治理至关重要.
- 该研究提供了一个空间决策框架,用于改善水连接.
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