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Linkages of plant stoichiometry to ecosystem production and carbon fluxes with increasing nitrogen inputs in an alpine steppe
Peng, Yunfeng1; Li, Fei1,2; Zhou, Guoying3,4; Fang, Kai1,2; Zhang, Dianye1,2; Li, Changbin2,3,4; Yang, Guibiao1,2; Wang, Guanqin1,2; Wang, Jun1,2; Yang, Yuanhe1,2
2017-12-01
Source PublicationGLOBAL CHANGE BIOLOGY
ISSN1354-1013
Volume23Issue:12Pages:5249-5259
SubtypeArticle
AbstractUnprecedented levels of nitrogen (N) have entered terrestrial ecosystems over the past century, which substantially influences the carbon (C) exchange between the atmosphere and biosphere. Temperature and moisture are generally regarded as themajor controllers over the N effects on ecosystem C uptake and release. N-phosphorous (P) stoichiometry regulates the growth and metabolisms of plants and soil organisms, thereby affecting many ecosystem C processes. However, it remains unclear how the N-induced shift in the plant N:P ratio affects ecosystem production and C fluxes and its relative importance. We conducted a field manipulative experiment with eight N addition levels in a Tibetan alpine steppe and assessed the influences of N on aboveground net primary production (ANPP), gross ecosystem productivity (GEP), ecosystem respiration (ER), and net ecosystem exchange (NEE); we used linear mixed-effects models to further determine the relative contributions of various factors to the N-induced changes in these parameters. Our results showed that the ANPP, GEP, ER, and NEE all exhibited nonlinear responses to increasing N additions. Further analysis demonstrated that the plant N:P ratio played a dominate role in shaping these C exchange processes. There was a positive relationship between the N-induced changes in ANPP (Delta ANPP) and the plant N:P ratio (Delta N:P), whereas the GEP, ER, and NEE exhibited quadratic correlations with the Delta N:P. In contrast, soil temperature and moisture were only secondary predictors for the changes in ecosystem production and C fluxes along the N addition gradient. These findings highlight the importance of plant N:P ratio in regulating ecosystem C exchange, which is crucial for improving our understanding of C cycles under the scenarios of global N enrichment.
KeywordCarbon (c) Cycle Ecosystem Respiration Gross Ecosystem Productivity Net Ecosystem Carbon Exchange Nitrogen Addition Nitrogen:Phosphorous (n:p) Ratio N-p Imbalance
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1111/gcb.13789
WOS KeywordTERRESTRIAL ECOSYSTEMS ; TEMPERATE STEPPE ; TIBETAN PLATEAU ; SOIL RESPIRATION ; GLOBAL CHANGES ; CO2 EFFLUX ; RESPONSES ; GRASSLAND ; PHOSPHORUS ; DEPOSITION
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(31400417 ; 31670482)
WOS Research AreaBiodiversity & Conservation ; Environmental Sciences & Ecology
WOS SubjectBiodiversity Conservation ; Ecology ; Environmental Sciences
WOS IDWOS:000414969000025
PublisherWILEY
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/10363
Collection中国科学院西北高原生物研究所
Corresponding AuthorYang, Yuanhe
Affiliation1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining, Qinghai, Peoples R China
4.Chinese Acad Sci, Key Lab Tibetan Med Res, Xining, Qinghai, Peoples R China
Recommended Citation
GB/T 7714
Peng, Yunfeng,Li, Fei,Zhou, Guoying,et al. Linkages of plant stoichiometry to ecosystem production and carbon fluxes with increasing nitrogen inputs in an alpine steppe[J]. GLOBAL CHANGE BIOLOGY,2017,23(12):5249-5259.
APA Peng, Yunfeng.,Li, Fei.,Zhou, Guoying.,Fang, Kai.,Zhang, Dianye.,...&Yang, Yuanhe.(2017).Linkages of plant stoichiometry to ecosystem production and carbon fluxes with increasing nitrogen inputs in an alpine steppe.GLOBAL CHANGE BIOLOGY,23(12),5249-5259.
MLA Peng, Yunfeng,et al."Linkages of plant stoichiometry to ecosystem production and carbon fluxes with increasing nitrogen inputs in an alpine steppe".GLOBAL CHANGE BIOLOGY 23.12(2017):5249-5259.
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