Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO2903 |
Sensitivity of grassland productivity to aridity controlled by stomatal and xylem regulation | |
Konings, A. G.1,2; Williams, A. P.3; Gentine, P.1,4 | |
2017-04-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The terrestrial water and carbon cycles are coupled through plant regulation of stomatal closure. Both soil moisture and vapour pressure deficit-the amount of moisture in the air relative to its potential maximum-can govern stomatal closure, which reduces plant carbon uptake. However, plants vary in the degree to which they regulate their stomata-and in association, xylem conductance-in response to increasing aridity: isohydric plants exert tight regulation of stomata and the water content of the plant, whereas anisohydric plants do not. Here we use remote-sensing data sets of anisohydricity and vegetation greenness to show that productivity in United States grasslands-especially anisohydric ones-is far more sensitive to variations in vapour pressure deficit than to variations in precipitation. Anisohydric ecosystem productivity is over three times more sensitive to vapour pressure deficit than isohydric ecosystem productivity. The precipitation sensitivity of summer productivity increases with anisohydricity only for the most anisohydric ecosystems. We conclude that increases in vapour pressure deficit rather than changes in precipitation-both of which are expected impacts of climate change-will be a dominant influence on future grassland productivity. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398162800016 |
WOS关键词 | VEGETATION OPTICAL DEPTH ; DATA ASSIMILATION SYSTEM ; PLANT HYDRAULICS ; WATER TRANSPORT ; SOIL-MOISTURE ; DROUGHT ; EVAPOTRANSPIRATION ; PREDICTION ; FOREST ; TRANSPIRATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/35168 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Columbia Univ, Dept Earth & Environm Engn, New York, NY 10027 USA; 2.Stanford Univ, Dept Earth Syst Sci, Stanford, CA 94305 USA; 3.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA; 4.Columbia Univ, Earth Inst, New York, NY 10027 USA |
推荐引用方式 GB/T 7714 | Konings, A. G.,Williams, A. P.,Gentine, P.. Sensitivity of grassland productivity to aridity controlled by stomatal and xylem regulation[J]. NATURE GEOSCIENCE,2017,10(4). |
APA | Konings, A. G.,Williams, A. P.,&Gentine, P..(2017).Sensitivity of grassland productivity to aridity controlled by stomatal and xylem regulation.NATURE GEOSCIENCE,10(4). |
MLA | Konings, A. G.,et al."Sensitivity of grassland productivity to aridity controlled by stomatal and xylem regulation".NATURE GEOSCIENCE 10.4(2017). |
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