水力策略调节森林生产力 应对更热的干旱
Julián Tijerín-Triviño1,2, Xavier Serra-Maluquer1, Raúl García-Valdés3
1Departamento de Ciencias de la Vida, Grupo de Ecología y Restauración Forestal (FORECO), Universidad de Alcalá, Madrid, Spain.
Global change biology
|July 28, 2025
概括
随着时间的推移,更热的干旱越来越严重地损害了森林的生产力. 具有更大的功能多样性和中度保守物种的森林表现出弹性,与那些由高度保守物种主导的森林不同.
科学领域:
- 生态生态学 生态生态学
- 气候变化科学 气候变化科学
- 林业林业 林业 林业 林业
背景情况:
- 气候变化增加了极端事件,威胁到全球森林生产力和碳循环调节.
- 森林对干旱等复合事件的反应受到物种的功能特征和多样性的影响.
- 现有的研究往往忽视了干旱的持续时间和频率,主要关注强度.
研究的目的:
- 评估更热的干旱强度,频率和持续时间对森林生产力的长期影响.
- 评估功能性认同和多样性如何调节森林生产力对干旱的反应.
- 了解气候变化对森林碳减排潜力的影响.
主要方法:
- 在地中海地区对1985-2018年森林生产率数据的分析.
- 集成LiDAR,多光谱图像和来自748个地块的森林库存记录.
- 应用通用线性混合模型来评估干旱影响和特征介导反应.
主要成果:
- 增加蒸汽压力赤字和干旱对森林生产力的负面影响随着时间的推移而加剧.
- 具有更高功能多样性和中度保守物种的森林在极端干旱期间表现出较小的生产力下降.
- 高度保守的物种占主导地位的森林显示出越来越多的负面生产力反应,可能是由于长时间的口腔关闭和碳饥饿.
结论:
- 更热的干旱对地中海森林的生产力产生了越来越负面和越来越严重的影响.
- 功能多样性和身份,特别是诸如化抵抗等特征,在干旱压力下稳定森林生产力.
- 纳入这些稳定作用对于准确建模长期气候变化对森林碳减排的影响至关重要.
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