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《Science | 迁徙的塞伦盖蒂食草动物放牧演替中竞争与促进的相互作用》

  • 来源专题：战略生物资源
  • 编译者： 李康音
  • 发布时间：2024-02-20

  • 2024年2月15日，维克森林大学等机构的研究人员在Science上发表题为Interplay of competition and facilitation in grazing succession by migrant Serengeti herbivores的文章。

    竞争、促进和捕食为迁徙食草动物的演替模式提供了另一种解释。然而，这些相互作用很难测量，因此对体型依赖性放牧的机制甚至是否发生了演替存在不确定性。

    研究人员使用来自 8 年相机陷阱调查、GPS 项圈食草动物和粪便 DNA 元条形码的数据来分析塞伦盖蒂国家公园迁徙食草动物的时间、到达顺序和相互作用。时间放牧演替的特点是“推拉”动态：竞争性放牧将斑马推到共同迁徙的角马之前，而这些体型较大的迁徙者吃草会吸引尾随的小体型瞪羚，这些瞪羚受益于促进。涉及强烈野火和降雨的“自然实验”分别破坏和加强了这些影响。

    该研究结果强调了促进和竞争力量在共同调节大规模有蹄类动物迁徙方面的平衡。

  • 原文来源：https://www.science.org/doi/10.1126/science.adg0744
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    • 来源专题：外来生物入侵
    • 编译者：王成卓
    • 发布时间：2018-11-05
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    • 编译者：李卫民
    • 发布时间：2017-03-28
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