Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13640 |
Reconciling seasonal hydraulic risk and plant water use through probabilistic soil-plant dynamics | |
Feng, Xue1,2; Dawson, Todd E.3,4; Ackerly, David D.3; Santiago, Louis S.5; Thompson, Sally E.1 | |
2017-09-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Current models used for predicting vegetation responses to climate change are often guided by the dichotomous needs to resolve either (i) internal plant water status as a proxy for physiological vulnerability or (ii) external water and carbon fluxes and atmospheric feedbacks. Yet, accurate representation of fluxes does not always equate to accurate predictions of vulnerability. We resolve this discrepancy using a hydrodynamic framework that simultaneously tracks plant water status and water uptake. We couple a minimalist plant hydraulics model with a soil moisture model and, for the first time, translate rainfall variability at multiple timescales - with explicit descriptions at daily, seasonal, and interannual timescales - into a physiologically meaningful metric for the risk of hydraulic failure. The model, parameterized with measured traits from chaparral species native to Southern California, shows that apparently similar transpiration patterns throughout the dry season can emerge from disparate plant water potential trajectories, and vice versa. The parsimonious set of parameters that captures the role of many traits across the soil-plant-atmosphere continuum is then used to establish differences in species sensitivities to shifts in seasonal rainfall statistics, showing that co-occurring species may diverge in their risk of hydraulic failure despite minimal changes to their seasonal water use. The results suggest potential shifts in species composition in this region due to species-specific changes in hydraulic risk. Our process-based approach offers a quantitative framework for understanding species sensitivity across multiple timescales of rainfall variability and provides a promising avenue toward incorporating interactions of temporal variability and physiological mechanisms into drought response models. |
英文关键词 | drought response plant hydraulic risk rainfall variability soil-plant feedback stochastic soil moisture dynamics |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406812100027 |
WOS关键词 | GLOBAL VEGETATION MODELS ; DROUGHT SURVIVAL ; EXTREME DROUGHT ; CLIMATE-CHANGE ; DESERT SHRUBS ; MORTALITY ; VULNERABILITY ; XYLEM ; CARBON ; ARCHITECTURE |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/17781 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA; 2.Univ Minnesota, Dept Civil Environm & Geoengn, St Paul, MN 55455 USA; 3.Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA; 4.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA; 5.Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521 USA |
推荐引用方式 GB/T 7714 | Feng, Xue,Dawson, Todd E.,Ackerly, David D.,et al. Reconciling seasonal hydraulic risk and plant water use through probabilistic soil-plant dynamics[J]. GLOBAL CHANGE BIOLOGY,2017,23(9). |
APA | Feng, Xue,Dawson, Todd E.,Ackerly, David D.,Santiago, Louis S.,&Thompson, Sally E..(2017).Reconciling seasonal hydraulic risk and plant water use through probabilistic soil-plant dynamics.GLOBAL CHANGE BIOLOGY,23(9). |
MLA | Feng, Xue,et al."Reconciling seasonal hydraulic risk and plant water use through probabilistic soil-plant dynamics".GLOBAL CHANGE BIOLOGY 23.9(2017). |
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