Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR027592 |
Landscape‐scale plant water content and carbon flux behavior following moisture pulses: from dryland to mesic environments | |
Andrew F. Feldman; Apisada Chulakadabba; Daniel J. Short Gianotti; Dara Entekhabi | |
2020-12-09 | |
发表期刊 | Water Resources Research |
出版年 | 2020 |
英文摘要 | Rain pulses followed by interstorm drying periods are the fundamental units of water input into ecosystems on sub‐weekly timescales. It is essential to understand landscape‐scale vegetation responses on these unit timescales as they may describe sensitivity of landscape water, carbon, and energy cycles to shifts in rainfall intensity and frequency, even if the average seasonal precipitation remains unchanged. Because pulse investigations are primarily carried out in drylands, little is known about the characteristics and extent of ecosystem plant pulse responses across the broader range of climates and biomes. Using satellite‐based plant water content (from vegetation optical depth) and plant carbon uptake observations from eddy covariance towers across the continental United States climate gradient (dry to humid), we characterize large‐scale plant carbon and water uptake responses to rain pulses during spring and summer months. We find that while all ecosystems in the study region show discernable plant water content and carbon flux responses to rain pulses, drier ecosystems exhibit more frequent and longer duration responses. Unlike mesic environments, drylands show significantly different responses under varying antecedent soil moisture and pulse magnitude conditions; the largest water and carbon uptakes follow large pulses on initially wet soils. We detect soil moisture thresholds primarily in drylands, which can partly explain dryland vegetation's different responses under dry and wet conditions. We conclude that vegetation responds to individual pulses of water availability across all climates and therefore a range of ecosystems are sensitive to rainfall distributions beyond simple seasonal precipitation totals. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/308260 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Andrew F. Feldman,Apisada Chulakadabba,Daniel J. Short Gianotti,等. Landscape‐scale plant water content and carbon flux behavior following moisture pulses: from dryland to mesic environments[J]. Water Resources Research,2020. |
APA | Andrew F. Feldman,Apisada Chulakadabba,Daniel J. Short Gianotti,&Dara Entekhabi.(2020).Landscape‐scale plant water content and carbon flux behavior following moisture pulses: from dryland to mesic environments.Water Resources Research. |
MLA | Andrew F. Feldman,et al."Landscape‐scale plant water content and carbon flux behavior following moisture pulses: from dryland to mesic environments".Water Resources Research (2020). |
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