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Updated: Jan 15, 2026

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Watershed Planning within a Quantitative Scenario Analysis Framework
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一个综合的方法来平衡淡水连接恢复和入侵风险
Alex Arkilanian1,2, David Coté3, Yolanda F Wiersma2
1Freeflow Nature Consulting Group, St. John's, Newfoundland and Labrador, Canada.
概括
息地碎片化影响本地鱼类,但可能阻碍入侵物种. 一个修改后的连接指数显示,恢复本地鱼类通道可能会无意中增加入侵物种的传播,特别是来自已建立的种群.
科学领域:
- 淡水生态学 淡水生态
- 侵入性物种生物学 侵入性物种生物学
- 保护科学 保护科学
背景情况:
- 息地碎片化对本地迁徙鱼群构成重大威胁.
- 矛盾的是,碎片化可以限制入侵物种的传播.
- 淡水连接指标对于了解鱼类的移动和生态过程至关重要.
研究的目的:
- 修改树突连接指数 (DCI) 以纳入多个侵入性分散途径.
- 评估消除障碍对本地和入侵物种连接性的影响.
- 确定战略性恢复地点,以平衡本地连接的收益与入侵物种传播风险.
主要方法:
- 调整了DCI的二面体和二面体形式,以模拟从出口和已建立群体的分散.
- 将修改后的DCI应用于大河流域,重点关注入侵性圆 (Neogobius melanostomus).
- 模拟单个和多个障碍移除场景,以评估本地和侵入性连接的变化.
主要成果:
- 侵入性物种的连接性与本地物种的连接性有很强的相关性.
- 消除障碍的模拟表明,增加本地连接往往伴随着侵入性连接的显著增加.
- 没有考虑侵入性扩散途径的恢复工作增加了侵入性传播的风险,即使在已建立的种群中也是如此.
结论:
- 考虑到来自出口和已建立群体的侵入性分散,对于有效恢复连接是必不可少的.
- 息地恢复计划必须整合入侵物种管理,以避免意外后果.
- 识别具有高本土与侵入性连接的地区可以指导有针对性的恢复工作.
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