在灌木的环境中,一个开放适应的地松鼠避免了灌木
Alexandra D Burnett1, John L Koprowski1,2
1School of Natural Resources and the Environment, University of Arizona, Tucson, AZ, United States of America.
PloS one
|February 12, 2024
概括
息地丧失威胁着像哈里斯鹿松鼠 (Ammospermophilus harrisii) 这样的小型哺乳动物. 这项研究揭示了松鼠选择仙人掌和灌木的特定行为,但避免灌木在他们的家庭范围,影响未来的分布.
科学领域:
- 生态生态学 生态生态学
- 野生动物保护 野生动物保护
- 沙漠生态 沙漠生态
背景情况:
- 息地丧失和退化是野生动物数量下降的主要驱动因素.
- 小哺乳动物在生态上具有重要意义,但易受快速环境变化的影响.
- 哈里斯的鹿松鼠 (Ammospermophilus harrisii) 是索诺拉沙漠的特有动物,面临着人为的景观变化.
研究的目的:
- 通过无线电遥测来量化哈里斯鹿松鼠的资源选择.
- 了解环境变化如何影响松鼠的行为和分布.
- 为沙漠小哺乳动物的保护战略提供信息.
主要方法:
- 在哈里斯的鹿松鼠 (Ammospermophilus harrisii) 上安装了无线电项圈.
- 在不同的空间尺度上分析了资源选择函数 (第三和第四阶段选择).
- 选择像仙人掌和灌木等息地特征的行为和规模相对量化.
主要成果:
- 松鼠选择了带有仙人掌和灌木的微型网站来挖掘和发出警报 (第四阶段选择).
- 然而,在家庭范围内的整体息地选择 (第三阶段选择) 显示避免了灌木.
- 不同选择表明复杂的息地使用受到行为和规模的影响.
结论:
- 灌木的侵占可能会对哈里斯鹿松鼠的行为和息地使用产生负面影响.
- 了解依赖规模的资源选择对于预测物种对景观变化的反应至关重要.
- 保护工作应考虑这种特有物种的特定息地需求.
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