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高分辨率的气候数据显示,日夜活动受到变暖驱动的活动限制的风险越来越高

Pauline C Dufour¹, Toby P N Tsang^1,2, Nicholas Alston³

¹Area of Biodiversity and Evolution, School of Biological Sciences The University of Hong Kong Hong Kong SAR China.

Ecology and evolution

|May 2, 2024

概括

由于气候变化而面临活动限制,特别是干旱地区的白天活动物种. 微气候和活动时间对于理解在不断变化的环境中耐热度至关重要.

科学领域:

*生态学和进化生物学,专注于外热生物生理学和气候变化影响.
* 科,专门研究的热耐受性和微型息地使用.

背景情况:

* 湿热体活动取决于温度,因此它们容易受到气候变化的影响.
*微气候的可用性和异质性影响热暴露和沿环境梯度的耐受性.
*了解这些因素对于预测物种对气候变化的反应至关重要.

研究的目的:

* 评估两种相似的物种在降水梯度上的耐热性和微气候利用.
* 根据预测的气候变化场景,确定这些物种目前和未来的变暖耐受性.
* 调查微息地和一天中的时间如何影响热暴露和活动限制.

主要方法:

* 测量了夜间和昼间的五个种群的临界热极限 (CTmax和CTmin).
* 在一年内,在六个地点记录了裂,全阳和部分阴影微气候的每小时热变化.
*采用生理学和建模方法来得出当前和未来的变暖公差.

主要成果:

* 在当前的气候条件下,夜间比白天更能耐受更大的热量.
* CTmin随着降水梯度而变化,而CTmax则没有.
*白天皮在夏季在干燥的地方经历了显著的日常活动限制,气候变化加剧了影响.

结论:

* 微型息地,白天的时间和季节对的热暴露和活动产生重大影响.
* 气候变化将增加活动限制和高温暴露的时间,即使在受保护的微生境中.
* 保护战略必须考虑时空尺度和息地特征,以预测物种对气候变化的脆弱性.

关键词:

活动模式活动模式气候变化气候变化气候变化电热器 (ectotherms) 是一个电热器.限制时间的限制时间.种内特定变化的变化.热暴露的热暴露时间变暖耐受性变暖耐受性

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