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昼间温度范围作为植物高度范围的关键预测指标,在全球范围内具有重要作用
Arnaud Gallou1, Alistair S Jump2, Joshua S Lynn3,4
1Department of Biological Sciences, University of Bergen, PO Box 7803, 5020, Bergen, Norway. arangacas@gmail.com.
Nature communications
|November 30, 2023
概括
拥有更大的范围的物种并不总是在变化的气候中发现的. 极端的温度可以限制物种,导致更小的范围,特别是在更大的日间温度范围内.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 生物地理学 生物地理学 生物地理学
背景情况:
- 一个普遍的生态假设表明,物种范围的大小和气候变化之间存在积极的关系,这是由更广泛的环境容忍驱动的.
- 这种假设忽略了极端温度在可变气候中的潜在负面影响,这些气候可以超过物种的热极限.
研究的目的:
- 提出并测试"温度范围挤压"假设,预测物种范围大小和温度变化之间的负相关性.
- 研究植物海拔范围大小与山区生态系统的短期和长期温度变化之间的关系.
主要方法:
- 分析了44个山区的88,000个海拔区间大小的血管植物.
- 范围大小与短期 (日间) 和长期温度变化的相关性.
主要成果:
- 在物种的范围大小和昼间温度范围之间发现了显著的负相关性.
- 这些发现支持了"温度范围挤压"假设,而不是传统的积极范围大小气候变化关系.
结论:
- 种类的范围大小受到温度变化,特别是日间波动的限制,这与之前的假设相反.
- 对短期温度变化的准确预测对于评估气候变化中的灭绝风险至关重要.
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