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相关概念视频

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为什么动物的息地范围随着人口密度的增加而减少?

Juliana Balluffi-Fry1, Yasmine N Majchrzak2, Michael J L Peers2

  • 1Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada.

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概括
此摘要是机器生成的。

雪鞋的家庭范围大小随着人口密度的增加而减少. 补充食物加剧了这种效应,表明竞争,而不是资源的可用性,在高密度下驱动较小的家庭范围.

关键词:
食品补充剂 食品补充剂 食品补充剂家庭范围尺寸大小 家庭范围尺寸人口周期的人口周期.资源的可用性,资源的可用性.雪鞋子的子 雪鞋子的子空间使用空间使用空间.

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科学领域:

  • 生态生态学 生态生态学
  • 动物行为 动物行为
  • 野生动物管理 野生动物管理

背景情况:

  • 理论上,局限于家庭范围的空间限制在资源获取方面具有能源效率.
  • 内部研究表明,随着人口密度的增加,家庭范围的大小会减少.
  • 这一趋势背后的机制 (竞争与资源密度的混) 仍然不清楚.

研究的目的:

  • 为了研究家庭范围大小和雪鞋子的人口密度之间的关系.
  • 为了确定是否增加同类竞争或资源密度混驱动了这种关系.
  • 评估食品补充对家庭群体大小在人口密度方面的影响.

主要方法:

  • 利用了10年的雪鞋子种群周期和个人级别的食品添加实验.
  • 在六个冬季内,88只无线电领的估计每周家庭范围大小 (90%的最低凸多边形).
  • 在人口密度的50倍变化中,对照和补充食物的子群体之间的家庭范围大小进行了比较.

主要成果:

  • 在对照子的家庭范围大小和人口密度之间观察到负相关性.
  • 家庭范围减少了2.5公,因为子密度从0.24增加到1.2公/公.
  • 补充食物的子表现出更明显的家庭范围大小的减少,随着人口密度的增加.

结论:

  • 家庭范围大小和人口密度之间的负面趋势很可能是由竞争驱动的,而不是资源密度的混.
  • 在高密度下,雪鞋子可能会减少资源共享,以尽量减少竞争并保持空间记忆.
  • 这表明,资源采集效率和密度驱动的约束之间存在权衡.