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Regional-scale patterns of C-13 and N-15 associated with multiple ecosystem functions along an aridity gradient in grassland ecosystems

文献类型：期刊论文

作者Wu, Ying2; Wang, Bing2; Chen, Dima
刊名PLANT AND SOIL
出版日期2018
卷号432期号:1-2页码:107-118
关键词Carbon and nitrogen cycling Ecosystem multifunctionality index Grassland degradation Stable isotopic carbon and nitrogen Vegetation type
ISSN号0032-079X
DOI10.1007/s11104-018-3781-8
文献子类Article
英文摘要AimsArid and semi-arid grassland ecosystems cover 41% of the global land surface but are currently being degraded by increases in aridity and changes in land use. As a consequence, ecosystem services, including carbon (C) and nitrogen (N) sequestration, are being reduced. In this study, we determined whether stable isotopic C (C-13) and N (N-15) values can be used to explain patterns of multiple ecosystem functions related to C and N cycling in arid and semi-arid grasslands at the regional scale.MethodsEcosystem (plant and soil) C-13 and N-15 values and ecosystem functions related to C and N cycling were investigated along an aridity gradient on the Mongolian Plateau. The gradient covered four vegetation grassland types with distinct characteristics of aridity and soil.ResultsWe found that ecosystem C-13 and N-15 values increased while ecosystem functions decreased as aridity increased. Structural equation modelling revealed that aridity directly and indirectly affected plant C-13 values by affecting plant C/N and indirectly affected soil C-13 values by affecting plant and soil C/N and plant C-13. Aridity directly and indirectly affected soil N-15 values by affecting soil C/N and soil pH, and indirectly affected plant N-15 values by affecting plant and soil C/N and soil N-15. As indicated by ecosystem C-13 and N-15 values, the negative effects of aridity on ecosystem functions were mainly derived from the direct and indirect effects of aridity on C cycling and N cycling, respectively.ConclusionsOur findings suggest that ecosystem C-13 and N-15 values can be used to explain patterns of multiple ecosystem functions related to C and N cycling in arid and semi-arid grasslands at the regional scale. Consideration of ecosystem C-13 and N-15 values in predictive models will greatly increase the ability to accurately simulate how ecosystem functions change in response to the rapid degradation of semi-arid grasslands.
学科主题Agronomy ; Plant Sciences ; Soil Science
出版地DORDRECHT
电子版国际标准刊号1573-5036
WOS关键词CARBON-ISOTOPE DISCRIMINATION ; NATURAL-ABUNDANCE DELTA-N-15 ; SOIL ORGANIC-MATTER ; GLOBAL PATTERNS ; NITROGEN DYNAMICS ; CLIMATE-CHANGE ; PLANT ; MULTIFUNCTIONALITY ; DELTA-C-13 ; LEAVES
语种英语
WOS记录号WOS:000447871600007
出版者SPRINGER
资助机构National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31570450] ; Chinese National Key Development Program for Basic Research [2015CB954201] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences [2015061]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/20726]  
专题植被与环境变化国家重点实验室
作者单位1.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Ying,Wang, Bing,Chen, Dima. Regional-scale patterns of C-13 and N-15 associated with multiple ecosystem functions along an aridity gradient in grassland ecosystems[J]. PLANT AND SOIL,2018,432(1-2):107-118.
APA Wu, Ying,Wang, Bing,&Chen, Dima.(2018).Regional-scale patterns of C-13 and N-15 associated with multiple ecosystem functions along an aridity gradient in grassland ecosystems.PLANT AND SOIL,432(1-2),107-118.
MLA Wu, Ying,et al."Regional-scale patterns of C-13 and N-15 associated with multiple ecosystem functions along an aridity gradient in grassland ecosystems".PLANT AND SOIL 432.1-2(2018):107-118.

入库方式： OAI收割

来源：植物研究所

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