NWIPB OpenIR
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
发表期刊GLOBAL CHANGE BIOLOGY
卷号23期号:12页码:5249-5259
文章类型Article
摘要Unprecedented 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.
关键词Carbon (c) Cycle Ecosystem Respiration Gross Ecosystem Productivity Net Ecosystem Carbon Exchange Nitrogen Addition Nitrogen:Phosphorous (n:p) Ratio N-p Imbalance
WOS标题词Science & Technology ; Life Sciences & Biomedicine
DOI10.1111/gcb.13789
关键词[WOS]TERRESTRIAL ECOSYSTEMS ; TEMPERATE STEPPE ; TIBETAN PLATEAU ; SOIL RESPIRATION ; GLOBAL CHANGES ; CO2 EFFLUX ; RESPONSES ; GRASSLAND ; PHOSPHORUS ; DEPOSITION
收录类别SCI
语种英语
项目资助者National Natural Science Foundation of China(31400417 ; 31670482)
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号WOS:000414969000025
引用统计
文献类型期刊论文
条目标识符http://210.75.249.4/handle/363003/10363
专题中国科学院西北高原生物研究所
作者单位1.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
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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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