Arid
DOI10.1371/journal.pone.0179875
Quantitative assessments of water-use efficiency in Temperate Eurasian Steppe along an aridity gradient
Chen, Yizhao1,2; Li, Jianlong2; Ju, Weimin3; Ruan, Honghua1; Qin, Zhihao4; Huang, Yiye5; Jeelani, Nasreen6; Padarian, Jose A.7; Propastin, Pavel8,9
通讯作者Li, Jianlong
来源期刊PLOS ONE
ISSN1932-6203
出版年2017
卷号12期号:7
英文摘要

Water-use efficiency (WUE), defined as the ratio of net primary productivity (NPP) to evapotranspiration (ET), is an important indicator to represent the trade-off pattern between vegetation productivity and water consumption. Its dynamics under climate change are important to ecohydrology and ecosystem management, especially in the drylands. In this study, we modified and used a late version of Boreal Ecosystem Productivity Simulator (BEPS), to quantify the WUE in the typical dryland ecosystems, Temperate Eurasian Steppe (TES). The Aridity Index (AI) was used to specify the terrestrial water availability condition. The regional results showed that during the period of 1999-2008, the WUE has a clear decreasing trend in the spatial distribution from arid to humid areas. The highest annual average WUE was in dry and semi-humid sub-region (DSH) with 0.88 gC mm (-1) and the lowest was in arid sub-region (AR) with 0.22 gC mm (-1). A two-stage pattern of WUE was found in TES. That is, WUE would enhance with lower aridity stress, but decline under the humid environment. Over 65% of the region exhibited increasing WUE. This enhancement, however, could not indicate that the grasslands were getting better because the NPP even slightly decreased. It was mainly attributed to the reduction of ET over 70% of the region, which is closely related to the rainfall decrease. The results also suggested a similar negative spatial correlation between the WUE and the mean annual precipitation (MAP) at the driest and the most humid ends. This regional pattern reflected the different roles of water in regulating the terrestrial ecosystems under different aridity levels. This study could facilitate the understanding of the interactions between terrestrial carbon and water cycles, and thus contribute to a sustainable management of nature resources in the dryland ecosystems.


类型Article
语种英语
国家Peoples R China ; Australia ; Germany
收录类别SCI-E
WOS记录号WOS:000405464100025
WOS关键词NET PRIMARY PRODUCTIVITY ; CLIMATE-CHANGE ; CARBON SEQUESTRATION ; TERRESTRIAL ECOSYSTEMS ; GRASSLAND ECOSYSTEMS ; VEGETATION GROWTH ; INNER-MONGOLIA ; PROCESS MODEL ; LAND-SURFACE ; SOIL CARBON
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
来源机构南京大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/201644
作者单位1.Nanjing Forestry Univ, Coll Biol & Environm, Joint Innovat Ctr Modern Forestry Studies, Nanjing, Jiangsu, Peoples R China;
2.Nanjing Univ, Sch Life Sci, Nanjing, Jiangsu, Peoples R China;
3.Nanjing Univ, Int Inst Earth Syst Sci, Nanjing, Jiangsu, Peoples R China;
4.Chinese Acad Agr Sci, Inst Agroresources & Reg Planning, Beijing, Peoples R China;
5.Nanjing Univ, Sch Atmospher Sci, Nanjing, Jiangsu, Peoples R China;
6.Nanjing Univ, Dept Ecol, Nanjing, Jiangsu, Peoples R China;
7.Univ Sydney, Fac Agr & Environm, Sydney, NSW, Australia;
8.Georg August Univ Gottingen, Inst Geog, Gottingen, Germany;
9.Georg August Univ Gottingen, Busgen Inst, Dept Bioclimatol, Gottingen, Germany
推荐引用方式
GB/T 7714
Chen, Yizhao,Li, Jianlong,Ju, Weimin,et al. Quantitative assessments of water-use efficiency in Temperate Eurasian Steppe along an aridity gradient[J]. 南京大学,2017,12(7).
APA Chen, Yizhao.,Li, Jianlong.,Ju, Weimin.,Ruan, Honghua.,Qin, Zhihao.,...&Propastin, Pavel.(2017).Quantitative assessments of water-use efficiency in Temperate Eurasian Steppe along an aridity gradient.PLOS ONE,12(7).
MLA Chen, Yizhao,et al."Quantitative assessments of water-use efficiency in Temperate Eurasian Steppe along an aridity gradient".PLOS ONE 12.7(2017).
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