Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/2014WR015515 |
Tree-grass competition for soil water in arid and semiarid savannas: The role of rainfall intermittency | |
D’Onofrio, Donatella1,2; Baudena, Mara3; D’Andrea, Fabio4; Rietkerk, Max3; Provenzale, Antonello2 | |
通讯作者 | D’Onofrio, Donatella |
来源期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2015 |
卷号 | 51期号:1页码:169-181 |
英文摘要 | Arid and semiarid savannas are characterized by the coexistence of trees and grasses in water limited conditions. As in all dry lands, also in these savannas rainfall is highly intermittent. In this work, we develop and use a simple implicit-space model to conceptually explore how precipitation intermittency influences tree-grass competition and savanna occurrence. The model explicitly includes soil moisture dynamics, and life-stage structure of the trees. Assuming that water availability affects the ability of both plant functional types to colonize new space and that grasses outcompete tree seedlings, the model is able to predict the expected sequence of grassland, savanna, and forest along a range of mean annual rainfall. In addition, rainfall intermittency allows for tree-grass coexistence at lower mean annual rainfall values than for constant precipitation. Comparison with observations indicates that the model, albeit very simple, is able to capture some of the essential dynamical processes of natural savannas. The results suggest that precipitation intermittency affects savanna occurrence and structure, indicating a new point of view for reanalyzing observational data from the literature. |
英文关键词 | savanna tree life-stage structure water competition precipitation implicit-space models |
类型 | Article |
语种 | 英语 |
国家 | Italy ; Netherlands ; France |
收录类别 | SCI-E |
WOS记录号 | WOS:000349889800010 |
WOS关键词 | AFRICAN SAVANNAS ; TROPICAL FOREST ; WOODY COVER ; VEGETATION ; FIRE ; COEXISTENCE ; ECOSYSTEMS ; CLIMATE ; GROWTH ; VARIABILITY |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/190785 |
作者单位 | 1.Univ Turin, Dept Phys, Turin, Italy; 2.CNR, Ist Sci Atmosfera & Clima, I-10126 Turin, Italy; 3.Univ Utrecht, Copernicus Inst Sustainable Dev, Utrecht, Netherlands; 4.Ecole Normale Super, Lab Meteorol Dynam, F-75231 Paris, France |
推荐引用方式 GB/T 7714 | D’Onofrio, Donatella,Baudena, Mara,D’Andrea, Fabio,et al. Tree-grass competition for soil water in arid and semiarid savannas: The role of rainfall intermittency[J],2015,51(1):169-181. |
APA | D’Onofrio, Donatella,Baudena, Mara,D’Andrea, Fabio,Rietkerk, Max,&Provenzale, Antonello.(2015).Tree-grass competition for soil water in arid and semiarid savannas: The role of rainfall intermittency.WATER RESOURCES RESEARCH,51(1),169-181. |
MLA | D’Onofrio, Donatella,et al."Tree-grass competition for soil water in arid and semiarid savannas: The role of rainfall intermittency".WATER RESOURCES RESEARCH 51.1(2015):169-181. |
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