大型巨在高温期间的温度调节策略不同
Loic Q Juillard1, Lisa M Ashby1, Taylor J McEvoy1
1Centre for Compassionate Conservation, TD School, University of Technology Sydney, Ultimo 2007 NSW, Australia.
Journal of thermal biology
|August 23, 2025
概括
随着气温的上升, 袋鼠越来越多地寻求阴影和水. 东部灰色袋鼠更喜欢水,而红色袋鼠更喜欢阴影,强调了野生动物生存的景观特征.
科学领域:
- 生态学
- 气候变化生物学
- 野生动物保护
背景情况:
- 半干旱地区因气候变化而面临气温上升.
- 像水和树这样的景观特征对于减轻野生动物的热应激至关重要.
- 在澳大利亚的干旱地区, 人类活动导致了树冠的消失和水资源的改变.
研究的目的:
- 调查东部灰色袋鼠 (Macropus giganteus) 和红色袋鼠 (Osphranter rufus) 对温度的反应使用水源和树.
- 了解景观变化 (水,土) 如何影响袋鼠在高温期间的行为.
主要方法:
- 使用热无人机,摄像机陷和温度传感器来监测袋鼠的活动和环境条件.
- 研究环境温度与袋鼠利用阳光,阴影和水资源之间的相关性.
- 比较袋鼠对不同水源的偏好 (大水流与挖掘土).
主要成果:
- 随着气温的增加,袋鼠避免阳光照射的区域;东部灰色袋鼠在阳光下度过的时间低于28°C,红色袋鼠在阳光下度过的时间低于17°C.
- 袋鼠使用的阴影与温度有正相关性,红色袋鼠选择的阴影较强.
- 东部灰色袋鼠在28°C以上的水点活动显著增加,更喜欢水而不是土;红色袋鼠在非常高的温度 (>36°C) 时更喜欢水.
结论:
- 野生动物在变暖的半干旱环境中的生存越来越依赖于水和阴影等基本景观特征的可用性和维护.
- 保护战略应考虑提供可访问的水和足够的树冠覆盖,以支持气候变化下的大型巨种群.
- 东部灰色和红色袋鼠对资源的使用差异表明它们有特定的息地管理需求.
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