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在南非的食肉动物社区内,时间分区和避免行为的潜力
Kyle Smith1, Jan A Venter1,2, Mike Peel3,4,5
1Mammal Research Institute, Department of Zoology and Entomology University of Pretoria Pretoria South Africa.
Ecology and evolution
|August 18, 2023
概括
南非的肉食物种很少完全避免彼此. 相反,它们在核心活动时间,特别是在干旱季节,尽量减少重叠,这表明共存的微细尺度时间分区.
科学领域:
- 生态生态学 生态生态学
- 行为生态学 行为生态学
- 野生动物保护 野生动物保护
背景情况:
- 肉食动物在生态系统的运作中起着至关重要的作用,物种在资源和生存方面竞争.
- 附属食肉动物经常适应行为,如时间活动分区,与主导物种共存.
- 了解这些适应是有效管理和保护各种生态系统中的野生动物的关键.
研究的目的:
- 调查南非同情性肉食动物物种之间的跨物种时间活动模式和避免策略.
- 确定季节性如何影响食肉动物活动的时间分区.
- 评估竞争和掠食风险在塑造食肉动物活动模式中的作用.
主要方法:
- 利用南非四个保护区的多季节摄像头捕捉数据,涵盖13种食肉动物物种.
- 在不同季节的diel (24小时) 和核心活动期间计算的跨种类重叠系数.
- 采用时间到事件分析来检查时空行为和避免模式.
主要成果:
- 完全避免迪尔活动模式是罕见的;大多数物种表现出高迪尔重叠,主要是夜间活动.
- 核心活动的重叠明显低于diel重叠 (p < .001),这表明微小的时间分区.
- 与雨季相比,干旱季节的日表活动重叠减少 (p = .045),突出显示季节性影响.
结论:
- 南非食肉动物活动模式不仅仅是由上下竞争压制主导物种所决定的.
- 精细地避免核心活动时期是时间分割的更为普遍的策略,而不是完全避免核心活动时期.
- 季节性在食肉动物的时间避开行为中起着重要作用,强调需要细微的保护策略.
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