一个夏季的热浪降低了活动,心率和秋季的体重在一个适应寒冷的类动物中
Physiological and biochemical zoology : PBZ
|July 7, 2023
概括
热浪挑战鹿的温度调节,减少活动并导致显著的体重损失. 这凸显了极端热对内热生物的直接影响,影响了它们的能量平衡和健康.
科学领域:
- 动物学 动物学
- 气候变化生物学 气候变化生物学
- 生理学 生理学 生理学
背景情况:
- 全球热浪的频率和强度正在增加.
- 在极端高温期间,内热植物面临着温度调节方面的挑战.
- 热应激会导致能量不足,并影响动物的健康.
研究的目的:
- 研究鹿 (Rangifer tarandus tarandus) 对严重的热浪的行为和生理反应.
- 评估热应激对鹿活动模式,体温,心率和体重的影响.
- 分析热浪对鹿群体质量的长期影响.
主要方法:
- 在热浪期间监测14只成年雌鹿的活动,心率和皮下体温.
- 在热浪之前和之后收集身体质量数据.
- 分析热浪后的身体质量与历史群体数据 (1990-2021) 相比.
主要成果:
- 鹿表现出活动减少,心率降低,随着空气温度升高,体温升高.
- 在炎热的日子 (≥20°C),总日活动减少了9%,食时间缩短.
- 9月平均体重比预测低16.4%,较不活跃的人群体重减轻较大.
结论:
- 热浪对像鹿这样适应寒冷的类动物来说是一个重大的温度调节挑战.
- 在热浪期间减少食时间直接导致大量的体重损失.
- 热应激对内热健康的直接影响随着气候变暖而变得越来越普遍.
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