DOI: 10.1002/2015GB005089
Scopus记录号: 2-s2.0-84941743176
论文题名: Plant nutrients do not covary with soil nutrients under changing climatic conditions
作者: Luo W ; , Elser J ; J ; , Lü X ; -T ; , Wang Z ; , Bai E ; , Yan C ; , Wang C ; , Li M ; -H ; , Zimmermann N ; E ; , Han X ; , Xu Z ; , Li H ; , Wu Y ; , Jiang Y
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期: 8 起始页码: 1298
结束页码: 1308
语种: 英语
英文关键词: aboveground and belowground relationship
; climate change
; precipitation
; soil fertility
; stoichiometry
; temperature
Scopus关键词: C3 plant
; C4 plant
; climate change
; concentration (composition)
; environmental gradient
; nitrogen
; nutrient limitation
; nutritional status
; phosphorus
; phytochemistry
; precipitation intensity
; resource allocation
; soil fertility
; soil nutrient
; stoichiometry
; temperature effect
; China
英文摘要: Nitrogen (N) and phosphorus (P) play vital roles in plant growth and development. Yet how climate regimes and soil fertility influence plant N and P stoichiometry is not well understood, especially in the belowground plant parts. Here we investigated plant aboveground and belowground N and P concentrations ([N] and [P]) and their stoichiometry in three dominant genera along a 2200 km long climatic gradient in northern China. Results showed that temperature explained more variation of [N] and [P] in C4 plants, whereas precipitation exerted a stronger influence on [N] and [P] in C3 plants. Both plant aboveground and belowground [N] and [P] increased with decreasing precipitation, and increasing temperatures yet were negatively correlated with soil [N] and [P]. Plant N:P ratios were unrelated with all climate and soil variables. Plant aboveground and belowground [N] followed an allometric scaling relationship, but the allocation of [P] was isometric. These results imply that internal processes stabilize plant N:P ratios and hence tissue N:P ratios may not be an effective parameter for predicting plant nutrient limitation. Our results also imply that past positive relationships between plant and nutrient stocks may be challenged under changing climatic conditions. While any modeling would need to be able to replicate currently observed relationships, it is conceivable that some relationships, such as those between temperature or rainfall and carbon:nutrient ratios, should be different under changing climatic conditions. ©2015. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77946
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; University of Chinese Academy of Sciences, Beijing, China; School of Life Sciences, Arizona State University, Tempe, AZ, United States; College of Environmental and Resource Sciences, Dalian Nationalities University, Dalian, China; Swiss Federal Research Institute, Birmensdorf, Switzerland
Recommended Citation:
Luo W,, Elser J,J,et al. Plant nutrients do not covary with soil nutrients under changing climatic conditions[J]. Global Biogeochemical Cycles,2015-01-01,29(8)