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应用入侵生物学框架来预测范围扩大掠食者的影响
Ryan A Beshai1, Paul E Bourdeau2, Lydia B Ladah3,4
1Department of Ecology and Evolutionary Biology, University of California, Irvine, Irvine, California, USA.
Ecology
|February 5, 2026
概括
由于全球变化的物种重新分布可能会改变生态系统. 这项研究发现,范围转移的鱼对猎物的影响是线性的,而不是非线性的,影响在历史和扩展范围之间是相似的,为保护策略提供了信息.
科学领域:
- 生态生态学 生态生态学
- 全球变化生物学
- 海洋生物学 海洋生物学
背景情况:
- 全球变化推动了物种范围的变化,将新物种引入新社区.
- 侵袭生物学理论预测侵袭性捕食者的非线性影响,在被侵袭的范围内更大.
- 范围转移的物种可能会表现出类似的非线性影响,并且由于猎物的天真或敌人的释放,在扩大范围时会产生更大的影响.
研究的目的:
- 测试入侵生物学框架对范围转移的物种的适用性.
- 为了比较两个不断扩大的鱼捕食者 (Acanthinucella spirata和Mexacanthina lugubris) 在它们的历史和扩大的范围中的影响.
- 评估对猎物的丰富性和社区多样性的影响是否在历史范围和扩大范围之间有所不同.
主要方法:
- 在鱼及其猎物 (鱼,) 上进行了观察调查和操纵实验.
- 在历史和扩大范围中评估猎物丰富性和社区多样性.
- 区间之间比较人均冲浪影响,以评估密度依赖的影响.
主要成果:
- 两种鱼物种都减少了猎物的丰富性,但影响显示了线性,而不是非线性,与捕食者密度的关系.
- 人均对猎物的影响并没有随着捕食者密度的增加而减少.
- 范围转移的鱼并没有持续影响社区的多样性,其影响在历史和扩大范围中通常类似.
结论:
- 侵袭生物学框架可以适应理解范围转移的物种,但影响可能是线性的,而不是非线性的.
- 扩大范围的范围变迁物种的影响往往与历史范围一致.
- 捕食者在历史范围中的丰富性和影响可以预测扩大范围的影响,有助于预期管理.
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