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Linkages of plant stoichiometry to ecosystem production and carbon fluxes with increasing nitrogen inputs in an alpine steppe

文献类型：期刊论文

作者Peng, Yunfeng; Li, Fei1; Zhou, Guoying3,4; Fang, Kai1; Zhang, Dianye1; Li, Changbin1,3,4; Yang, Guibiao1; Wang, Guanqin1; Wang, Jun1; Yang, Yuanhe1
刊名GLOBAL CHANGE BIOLOGY
出版日期2017
卷号23期号:12页码:5249-5259
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
ISSN号1354-1013
DOI10.1016/j.foodchem.2016.09.083
文献子类Article
英文摘要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.
学科主题Chemistry ; Food Science & Technology ; Nutrition & Dietetics
出版地HOBOKEN
电子版国际标准刊号1365-2486
WOS关键词TERRESTRIAL ECOSYSTEMS ; SOIL RESPIRATION ; TIBETAN PLATEAU ; CO2 EFFLUX ; RESPONSES ; PHOSPHORUS ; DEPOSITION ; TEMPERATE ; LIMITATION ; BIOMASS
语种英语
WOS记录号WOS:000386984100061
出版者WILEY
资助机构National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31400417, 31670482]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/22184]  
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, Beijing, Peoples R China
2.Chinese Acad Sci, Key Lab Tibetan Med Res, Xining, Qinghai, Peoples R China
3.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining, Qinghai, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式
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.

入库方式： OAI收割

来源：植物研究所

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