Drought-induced ecosystem resistance and recovery observed at 118 flux tower stations across the globe

IF 5.6 1区农林科学 Q1 AGRONOMY

Agricultural and Forest Meteorology Pub Date : 2024-07-27 DOI:10.1016/j.agrformet.2024.110170

引用次数: 0

Abstract

Drought resistance and drought recovery are important metrics of ecosystems in responding to extreme climate events. However, it remains unclear how drought resistance and drought recovery vary across different ecosystems and whether an internal relationship exists between them. Here, we used observed evapotranspiration and gross primary productivity from 118 flux tower stations worldwide to investigate drought resilience in nine ecosystems. Our results show that drought resistance is higher for evergreen forests but lower for croplands and shrublands. Overall, the ecosystem recovery times ranged from 4.1 to 6.7 months, with a monthly recovery rate ranging from 8.5% to 24.4%. Drought resistance had a negative relationship (R² = 0.61-0.67, p ≤ 0.01) with the drought recovery rate for the nine selected ecosystems, particularly under mild and moderate drought events. This is beneficial for narrowing the difference in recovery time between ecosystems. Our results provide insights for understanding ecosystem behaviors under climate extremes.

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全球 118 个通量塔观测站观测到的干旱引起的生态系统抵抗和恢复情况

抗旱性和干旱恢复是生态系统应对极端气候事件的重要指标。然而，目前还不清楚不同生态系统的抗旱性和干旱恢复能力有何差异，它们之间是否存在内在联系。在此，我们利用全球 118 个通量塔站观测到的蒸散量和总初级生产力，研究了九个生态系统的抗旱性。结果表明，常绿林的抗旱能力较强，而耕地和灌木林的抗旱能力较弱。总体而言，生态系统的恢复时间从 4.1 个月到 6.7 个月不等，月恢复率从 8.5% 到 24.4% 不等。抗旱性与九个选定生态系统的干旱恢复率呈负相关（R = 0.61-0.67，p ≤ 0.01），尤其是在轻度和中度干旱事件下。这有利于缩小生态系统之间恢复时间的差异。我们的研究结果为理解极端气候下的生态系统行为提供了启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Agricultural and Forest Meteorology 农林科学-林学

CiteScore

10.30

自引率

9.70%

发文量

415

审稿时长

69 days

期刊介绍： Agricultural and Forest Meteorology is an international journal for the publication of original articles and reviews on the inter-relationship between meteorology, agriculture, forestry, and natural ecosystems. Emphasis is on basic and applied scientific research relevant to practical problems in the field of plant and soil sciences, ecology and biogeochemistry as affected by weather as well as climate variability and change. Theoretical models should be tested against experimental data. Articles must appeal to an international audience. Special issues devoted to single topics are also published. Typical topics include canopy micrometeorology (e.g. canopy radiation transfer, turbulence near the ground, evapotranspiration, energy balance, fluxes of trace gases), micrometeorological instrumentation (e.g., sensors for trace gases, flux measurement instruments, radiation measurement techniques), aerobiology (e.g. the dispersion of pollen, spores, insects and pesticides), biometeorology (e.g. the effect of weather and climate on plant distribution, crop yield, water-use efficiency, and plant phenology), forest-fire/weather interactions, and feedbacks from vegetation to weather and the climate system.