未来的气候使湿热带雨林中液压故障的风险增加了一倍
Zachary Robbins1, Jeffrey Chambers2, Rutuja Chitra-Tarak1
1Earth & Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
The New phytologist
|July 20, 2024
概括
未来的气候变化对热带森林构成风险,尽管生产力有所提高,但由于水力故障增加了树木死亡率. 植物特征显著影响这些风险,有些变得不可行.
科学领域:
- 生态生态学 生态生态学
- 气候科学 气候科学
- 林业林业 林业 林业 林业
背景情况:
- 由于气候变化,森林生态系统面临着不确定的未来.
- 植物的液压特性,二氧化碳水平,变暖和降水变化是影响森林动态的关键因素.
- 了解这些相互作用对于预测森林弹性至关重要.
研究的目的:
- 评估未来气候情景对热带森林生产力和液压故障风险的影响.
- 评估工厂液压特征和高二氧化碳在这些影响中介作用.
- 根据不同的排放途径,预测森林生长和死亡率的变化.
主要方法:
- 利用了动态植被模型FATES-HYDRO,结合了植物水力动力学.
- 在一个潮湿的热带森林 (巴罗科罗拉多岛,巴拿马) 中模拟了常态水平的反应.
- 根据观察到的数据对模型进行校准,并在各种气候和二氧化碳场景下进行模拟 (SSP2-45,SSP5-85).
主要成果:
- 在未来的气候条件下,液压故障风险预计将从5.7%增加到10.1-11.3%.
- 增加的二氧化碳仅略有改善了液压故障风险,但减轻了原始生产率 (GPP) 的减少.
- 植物特征组合解释了水力故障风险的变化比单独的二氧化碳或气候更大.
结论:
- 新热带森林可能会经历更快的增长,同时由于水力故障的增加,死亡率也会更高.
- 在预测的未来气候条件下,特定的植物特征组合可能会变得不可行.
- 森林管理和保护战略必须考虑特征介导的应对气候变化.
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