Water- and Plant-Mediated Responses of Ecosystem Carbon Fluxes to Warming and Nitrogen Addition on the Songnen Grassland in Northeast China

doi:10.1371/journal.pone.0045205

CORC > 中国农业科学院 > 农业环境与可持续发展研究所 > 旱作节水研究室

	Water- and Plant-Mediated Responses of Ecosystem Carbon Fluxes to Warming and Nitrogen Addition on the Songnen Grassland in Northeast China
	Jiang, Li 1; Guo, Rui 2; Zhu, Tingcheng 1; Niu, Xuedun 3; Guo, Jixun 1; Sun, Wei 1
刊名	PLOS ONE
	2012
卷号	7 期号:9 页码:-
ISSN号	1932-6203
DOI	10.1371/journal.pone.0045205
通讯作者	Jiang, Li
英文摘要	Background: Understanding how grasslands are affected by a long-term increase in temperature is crucial to predict the future impact of global climate change on terrestrial ecosystems. Additionally, it is not clear how the effects of global warming on grassland productivity are going to be altered by increased N deposition and N addition.Methodology/Principal Findings: In-situ canopy CO2 exchange rates were measured in a meadow steppe subjected to 4-year warming and nitrogen addition treatments. Warming treatment reduced net ecosystem CO2 exchange (NEE) and increased ecosystem respiration (ER); but had no significant impacts on gross ecosystem productivity (GEP). N addition increased NEE, ER and GEP. However, there were no significant interactions between N addition and warming. The variation of NEE during the four experimental years was correlated with soil water content, particularly during early spring, suggesting that water availability is a primary driver of carbon fluxes in the studied semi-arid grassland.Conclusion/Significance: Ecosystem carbon fluxes in grassland ecosystems are sensitive to warming and N addition. In the studied water-limited grassland, both warming and N addition influence ecosystem carbon fluxes by affecting water availability, which is the primary driver in many arid and semiarid ecosystems. It remains unknown to what extent the long-term N addition would affect the turn-over of soil organic matter and the C sink size of this grassland.
学科主题	Multidisciplinary Sciences ; MULTIDISCIPLINARY SCIENCES
语种	英语
出版者	PUBLIC LIBRARY SCIENCE
WOS记录号	WOS:000309388400065
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/19879]
专题	农业环境与可持续发展研究所_旱作节水研究室
作者单位	1.NE Normal Univ, Inst Grassland Sci, Minist Educ, Key Lab Vegetat Ecol, Changchun, Jilin Province, Peoples R China 2.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Key Lab Dryland Agr, Minist Agr, Beijing 100193, Peoples R China 3.Jilin Univ, Coll Life Sci, Minist Educ, Key Lab Mol Enzymol & Engn, Changchun 130023, Jilin Province, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Li,Guo, Rui,Zhu, Tingcheng,et al. Water- and Plant-Mediated Responses of Ecosystem Carbon Fluxes to Warming and Nitrogen Addition on the Songnen Grassland in Northeast China[J]. PLOS ONE,2012,7(9):-.
APA	Jiang, Li,Guo, Rui,Zhu, Tingcheng,Niu, Xuedun,Guo, Jixun,&Sun, Wei.(2012).Water- and Plant-Mediated Responses of Ecosystem Carbon Fluxes to Warming and Nitrogen Addition on the Songnen Grassland in Northeast China.PLOS ONE,7(9),-.
MLA	Jiang, Li,et al."Water- and Plant-Mediated Responses of Ecosystem Carbon Fluxes to Warming and Nitrogen Addition on the Songnen Grassland in Northeast China".PLOS ONE 7.9(2012):-.