干旱重塑了掠食者的顶峰空间使用和协会内部重叠
Leigh West1,2, Kasim Rafiq1,2, Sarah J Converse3
1Center for Ecosystem Sentinels, Department of Biology, University of Washington, Seattle, Washington, USA.
The Journal of animal ecology
|October 5, 2024
概括
气候变化引起的干旱扩大了大型食肉动物的息地范围,增加了狮子和猎等物种之间的重叠. 这影响了它们的相互作用,可能需要更大的保护区进行保护.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 保护科学 保护科学
背景情况:
- 全球气候变化正在增加干旱的频率和严重程度,影响资源可用性和动物生态.
- 了解干旱如何影响动物行为,特别是大型食肉动物,对于预测社区一级反应至关重要.
- 有限的多物种数据阻碍了对气候变异对食肉动物行为和协会内部动态的影响的理解.
研究的目的:
- 调查干旱对大型食肉动物空间使用和协会内部动态的影响.
- 分析干旱如何影响空间重叠和对象同样的大肉食动物之间的微量相互作用.
- 为了将环境变化,动物行为和社团内部关系联系起来.
主要方法:
- 利用了来自南非狮子,,非洲野狗和猎的11年的GPS数据.
- 分析了四个严重干旱事件的数据,以评估空间使用和空间重叠的变化.
- 检查了与干旱条件相关的微细规模的协会内部相互作用.
主要成果:
- 干旱显著扩大了所有研究的食肉动物物种的月度家庭范围大小 (35%66%).
- 在干旱期间,狮子和下属类动物 (猎,) 的空间重叠增加了多达119%.
- 在干旱条件下,狮子猎遭遇率下降,尽管空间重叠增加.
结论:
- 干旱明显改变了大型食肉动物的空间使用和竞争物种之间的时空空间划分.
- 微小的避开行为可能有助于干旱期间的共存,但长期的保护需要更大的区域.
- 保护战略必须考虑到大型食肉动物由于干旱加剧而增加的空间需求.
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