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

doi:10.1007/s11104-018-3781-8

	Regional-scale patterns of C-13 and N-15 associated with multiple ecosystem functions along an aridity gradient in grassland ecosystems
	Wu, Ying 1; Wang, Bing 1; Chen, Dima
	2018
发表期刊	PLANT AND SOIL
ISSN	0032-079X
卷号	432 期号:1-2 页码:107-118
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.
关键词	Carbon and nitrogen cycling Ecosystem multifunctionality index Grassland degradation Stable isotopic carbon and nitrogen Vegetation type
学科领域	Agronomy ; Plant Sciences ; Soil Science
DOI	10.1007/s11104-018-3781-8
收录类别	SCI
语种	英语
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
WOS记录号	WOS:000447871600007
出版者	SPRINGER
文献子类	Article
出版地	DORDRECHT
EISSN	1573-5036
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]
作者邮箱	chendima@ibcas.ac.cn
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	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.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Coll Life Sci, Beijing 100049, 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.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Wu-2018-Regional-sca（840KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览请求全文