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用生物物理模型和LiDAR绘制鸟类树冠热避难所的地图

Lara H Strydom^1,2, Shannon R Conradie^1,2,3, Izak P J Smit^1,4

¹Department of Zoology and Entomology, University of Pretoria, Private Bag X20, Hatfield, 0028, South Africa.

International journal of biometeorology

|November 25, 2024

概括

气候变化严重威胁着草原鸟类,因为它减少了凉爽的微气候. 从一个世纪到一个世纪.

科学领域:

生态学和气候变化生物学生态学
鸟类生态生理学鸟类生态生理学
景观建模景观建模

背景情况:

准确预测动物对气候变化的暴露需要评估气候变暖对微气候的影响.
在炎热的天气中,鸟类利用凉爽的植被微站点.
亚热带非洲的沙瓦纳面临着日益高温的局面.

研究的目的:

评估萨凡纳景观中目前和未来可用的凉爽鸟类微站点的可用性.
在气候变化场景下模拟鸟类对热应激的暴露.

主要方法:

结合基于LiDAR的树冠映射与生物物理建模.
开发了针对bulbul和hornbill的特定物种模型.
模拟暴露于体温超过42°C的体温.

主要成果:

目前,34.5%的树木为两种物种提供了适合的凉爽微气候.
在RCP 8.5下,到本世纪末,冷却微型站点的可用性将暴跌至0.4% (bulbuls) 和3.8% (hornbills).
对两种物种来说,暴露于高于42°C的温度将显著增加.

结论:

草原鸟类面临着在一个商业常规排放场景下,热避难所的大幅减少.
气候变化对非洲大草原中的鸟类种群构成重大威胁.
迫切需要采取缓解策略来保护关键的鸟类息地.

关键词:

鸟类鸟类鸟类鸟类气候变化气候变化气候变化微观气候是一种微观气候.遥感是一种远程传感.热带景观的热带景观

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