Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.16046 |
Reduced ecosystem resilience quantifies fine-scale heterogeneity in tropical forest mortality responses to drought | |
Donghai Wu; German Vargas G.; Jennifer S. Powers; Nate G. McDowell; Justin M. Becknell; Daniel Pé; rez-Aviles; David Medvigy; Yanlan Liu; Gabriel G. Katul; Julio Cé; sar Calvo-Alvarado; Ana Calvo-Obando; Arturo Sanchez-Azofeifa; Xiangtao Xu | |
2021-12-30 | |
发表期刊 | Global Change Biology
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出版年 | 2021 |
英文摘要 | Sensitivity of forest mortality to drought in carbon-dense tropical forests remains fraught with uncertainty, while extreme droughts are predicted to be more frequent and intense. Here, the potential of temporal autocorrelation of high-frequency variability in Landsat Enhanced Vegetation Index (EVI), an indicator of ecosystem resilience, to predict spatial and temporal variations of forest biomass mortality is evaluated against in situ census observations for 64 site-year combinations in Costa Rican tropical dry forests during the 2015 ENSO drought. Temporal autocorrelation, within the optimal moving window of 24 months, demonstrated robust predictive power for in situ mortality (leave-one-out cross-validation R2 = 0.54), which allows for estimates of annual biomass mortality patterns at 30 m resolution. Subsequent spatial analysis showed substantial fine-scale heterogeneity of forest mortality patterns, largely driven by drought intensity and ecosystem properties related to plant water use such as forest deciduousness and topography. Highly deciduous forest patches demonstrated much lower mortality sensitivity to drought stress than less deciduous forest patches after elevation was controlled. Our results highlight the potential of high-resolution remote sensing to “fingerprint” forest mortality and the significant role of ecosystem heterogeneity in forest biomass resistance to drought. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/345163 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Donghai Wu,German Vargas G.,Jennifer S. Powers,et al. Reduced ecosystem resilience quantifies fine-scale heterogeneity in tropical forest mortality responses to drought[J]. Global Change Biology,2021. |
APA | Donghai Wu.,German Vargas G..,Jennifer S. Powers.,Nate G. McDowell.,Justin M. Becknell.,...&Xiangtao Xu.(2021).Reduced ecosystem resilience quantifies fine-scale heterogeneity in tropical forest mortality responses to drought.Global Change Biology. |
MLA | Donghai Wu,et al."Reduced ecosystem resilience quantifies fine-scale heterogeneity in tropical forest mortality responses to drought".Global Change Biology (2021). |
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