大范围的木质植物利用岩底储存的水
Erica L McCormick1, David N Dralle2, W Jesse Hahm3
1Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, USA. erica.mccormick@utexas.edu.
Nature
|September 9, 2021
概括
不仅仅是在干旱期间, 这种岩石湿度对水和碳循环至关重要,
科学领域:
- 地球科学
- 生态学
- 水文学
背景情况:
- 实地研究显示,木质植物从岩石底层的孔隙和裂中获得大量的水.
- 基岩储水可能是植物可用的关键水源,需要对水和碳循环模型进行修订.
- 纳入基岩特性对于全面了解陆地水文是必不可少的.
研究的目的:
- 估计基岩水储存对美国大陆植物透的贡献.
- 分析木质植物对岩层水的时间和空间模式.
- 评估岩石湿度在陆地水和碳循环中的重要性.
主要方法:
- 使用分布式,公开可用的数据集进行美国大陆分析.
- 检查了岩石基层吸收的时间和空间模式.
- 量化了岩底水对出汗的贡献.
主要成果:
- 木植物在不同的气候和生物群中广泛获得岩基水.
- 不仅仅是在极端干旱的条件下,
- 在加利福尼亚州,每年地下岩石水的透气量超过了水库储存,相关的植被占地面碳的50%以上.
结论:
- 植物通常从岩石底层获得岩石水分,而不是地下水.
- 岩石湿度是陆地水和碳循环的关键组成部分,与土壤湿度相似.
- 了解基岩水吸收对于修改水文和生态学的概念范式至关重要.
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