水分可利用性、林分结构和水力性状多样性决定了森林的稳定性

IF 3.7 2区农林科学 Q1 FORESTRY

Forest Ecology and Management Pub Date : 2025-07-03 DOI:10.1016/j.foreco.2025.122946

José V. Roces-Díaz , Raúl García-Valdés , Miquel de Cáceres , Adrià Descals , Pilar Hurtado , Francisco Lloret , Josep Maria Espelta , José Manuel Álvarez-Martínez , Enric Batllori , Jordi Martínez-Vilalta

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引用次数: 0

摘要

对减缓气候变化至关重要的森林生产力日益受到环境波动，特别是干旱的威胁。森林生产力的时间稳定性——其随时间保持一致的能力——受到气候、森林结构、群落成熟度以及树木组成和多样性的影响。然而，虽然分类组成和多样性对森林稳定性的影响已被广泛研究，但组成和多样性在干旱相关性状中的作用却很少受到关注。本研究探讨了2000年至2018年期间，西班牙约40,000个森林地块的耐旱性状以及气候和结构因素如何影响森林稳定性。我们使用卫星衍生的植被指数作为生产力的代理来评估稳定性，并使用森林清查数据和物种特征来计算社区水平的抗旱性。水分可利用性是稳定性的最强正向驱动因素，时间稳定性、土壤持水能力、森林成熟度和密度也有正向贡献，但程度较小。最低温度的影响很小，而且是负的。与水力安全相关的抗旱性状（P50和水力安全裕度）的功能多样性对稳定性的影响不大，但在统计学上显著且一致。社区加权平均性状值显示混合效应。虽然气候是影响森林稳定性的主要因素，但我们的研究结果强调了耐旱多样性的相关作用，为解释先前的研究结果提供了潜在的机制，即耐旱多样性提高了干旱易发地区的长期生产力。这表明，促进与干旱有关的功能多样化可被视为加强森林生态系统服务稳定性的潜在管理战略，特别是在气候变率和干旱频率上升的情况下。

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Water availability, stand structure, and hydraulic trait diversity drive forest stability

Forest productivity, essential for climate change mitigation, is increasingly threatened by environmental fluctuations, particularly droughts. Temporal stability in forest productivity —its ability to remain consistent over time— is influenced by climate, forest structure, community maturity, and tree composition and diversity. However, while the effect of taxonomic composition and diversity on forest stability has been extensively studied, the role of composition and diversity in drought related trait has received less attention. This study explores how drought-tolerance traits, alongside climatic and structural factors affect forest stability between 2000 and 2018 across ∼40,000 forest plots in Spain. We used satellite-derived vegetation indices as proxies for productivity to assess stability, and forest inventory data and species traits to calculate community-level drought tolerance. Water availability was the strongest positive driver of stability, with temporal stability, soil water-holding capacity, and forest maturity and density also contributing positively, though to a lesser extent. Minimum temperature had a small and negative effect. Functional diversity in drought-tolerance traits related to hydraulic safety (P50 and Hydraulic Safety Margin) had a modest but statistically significant and consistent positive effect on stability. Community-weighted mean trait values showed mixed effects. While climate was the dominant factor shaping forest stability, but our findings highlight a relevant role of drought-tolerance diversity, providing a potential mechanism to explain previous findings that drought-tolerance diversity enhances long-term productivity in drought-prone regions. This suggests that fostering drought-related functional diversification could be considered as a potential management strategy to strengthen the stability of forest ecosystem services, especially amid rising climate variability and drought frequency.

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来源期刊

Forest Ecology and Management 农林科学-林学

CiteScore

7.50

自引率

10.80%

发文量

665

审稿时长

39 days

期刊介绍： Forest Ecology and Management publishes scientific articles linking forest ecology with forest management, focusing on the application of biological, ecological and social knowledge to the management and conservation of plantations and natural forests. The scope of the journal includes all forest ecosystems of the world. A peer-review process ensures the quality and international interest of the manuscripts accepted for publication. The journal encourages communication between scientists in disparate fields who share a common interest in ecology and forest management, bridging the gap between research workers and forest managers. We encourage submission of papers that will have the strongest interest and value to the Journal''s international readership. Some key features of papers with strong interest include: 1. Clear connections between the ecology and management of forests; 2. Novel ideas or approaches to important challenges in forest ecology and management; 3. Studies that address a population of interest beyond the scale of single research sites, Three key points in the design of forest experiments, Forest Ecology and Management 255 (2008) 2022-2023); 4. Review Articles on timely, important topics. Authors are welcome to contact one of the editors to discuss the suitability of a potential review manuscript. The Journal encourages proposals for special issues examining important areas of forest ecology and management. Potential guest editors should contact any of the Editors to begin discussions about topics, potential papers, and other details.