湿度的增加将加剧湿低地占据的鸟类致命的高温风险
Bianca Coulson1,2, Marc T Freeman1,2, Shannon R Conradie3
1South African Research Chair in Conservation Physiology, South African National Biodiversity Institute, 2 Cussonia Ave, Brummeria, Pretoria 0184, South Africa.
Conservation physiology
|June 4, 2025
概括
热浪造成的鸟类死亡风险正在增加,特别是在潮湿的地区. 气温和湿度的上升对鸟类的生物多样性构成重大威胁,可能导致种群减少和灭绝.
科学领域:
- 鸟类生态学 鸟类生态学
- 气候变化生物学
- 生理生态生态学生理生态学
背景情况:
- 越来越多的热浪对鸟类死亡率构成威胁.
- 研究主要集中在干旱地区,使湿的低地鸟类被研究不足.
- 预计气温和湿度上升将增加鸟类的热应激.
研究的目的:
- 评估潮湿环境中鸟类与热相关的死亡风险.
- 调查湿球温度上升对禽类高温症风险的影响.
- 为了模拟当前和未来的暴露在致命的炎热条件下的喇喇.
主要方法:
- 经验性地确定了吹号角鸟 (Bycanistes bucinator) 的最大湿球温度 (TW-max).
- 模拟了目前和未来的暴露在超过T的条件下W-max在物种的范围内,在业务如常的排放场景下.
- 将植被的热缓冲效应纳入未来的暴露模型.
主要成果:
- 预计到本世纪末,在它们的46%的息地,角鸟将在至少1天/年内经历TW>>TW-max,而目前的比例为30%.
- 在刚果民主共和国南部的部分地区,暴露频率可能达到~100天/年.
- 植被缓冲可以使世纪末的暴露减少0.3-66.7%,突出显示了凉爽的微站点的重要性.
结论:
- 在潮湿,低度环境中的鸟类面临致命高温症的风险大幅增加.
- 气候变化对全球鸟类生物多样性构成重大威胁,可能导致人口减少和灭绝.
- 保护战略应考虑植被在减轻鸟类热应激方面的作用.
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