Knowledge Management System of Northwest Institute of Plateau Biology, CAS
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 |
ISSN | 1354-1013 |
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 |
DOI | 10.1111/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 |
出版者 | WILEY |
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 |
通讯作者 | Yang, Yuanhe |
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 |
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. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论