globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13721
论文题名:
Changes in nutrient concentrations of leaves and roots in response to global change factors
作者: Sardans J.; Grau O.; Chen H.Y.H.; Janssens I.A.; Ciais P.; Piao S.; Peñuelas J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:9
起始页码: 3849
结束页码: 3856
语种: 英语
英文关键词: CO 2 ; drought ; ecological stoichiometry ; N deposition ; N:P ; nitrogen ; phosphorus
英文摘要: Global change impacts on biogeochemical cycles have been widely studied, but our understanding of whether the responses of plant elemental composition to global change drivers differ between above- and belowground plant organs remains incomplete. We conducted a meta-analysis of 201 reports including 1,687 observations of studies that have analyzed simultaneously N and P concentrations changes in leaves and roots in the same plants in response to drought, elevated [CO2], and N and P fertilization around the world, and contrasted the results within those obtained with a general database (838 reports and 14,772 observations) that analyzed the changes in N and P concentrations in leaves and/or roots of plants submitted to the commented global change drivers. At global level, elevated [CO2] decreased N concentrations in leaves and roots and decreased N:P ratio in roots but no in leaves, but was not related to P concentration changes. However, the response differed among vegetation types. In temperate forests, elevated [CO2] was related with lower N concentrations in leaves but not in roots, whereas in crops, the contrary patterns were observed. Elevated [CO2] decreased N concentrations in leaves and roots in tundra plants, whereas not clear relationships were observed in temperate grasslands. However, when elevated [CO2] and N fertilization coincided, leaves had lower N concentrations, whereas root had higher N concentrations suggesting that more nutrients will be allocated to roots to improve uptake of the soil resources not directly provided by the global change drivers. N fertilization and drought increased foliar and root N concentrations while the effects on P concentrations were less clear. The changes in N and P allocation to leaves and root, especially those occurring in opposite direction between them have the capacity to differentially affect above- and belowground ecosystem functions, such as litter mineralization and above- and belowground food webs. © 2017 John Wiley & Sons Ltd
资助项目: The authors would like to acknowledge the financial support from the European Research Council Synergy grant ERC-SyG-2013-610028 IMBALANCE-P, the Spanish Government grant CGL2013-48074-P and the Catalan Government grant SGR 2014-274.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60840
Appears in Collections:影响、适应和脆弱性

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作者单位: CSIC, Global Ecology Unit CREAF-CEAB-UAB, Barcelona, Spain; CREAF, Barcelona, Spain; Faculty of Natural Resources Management, Lakehead University, Thunder Bay, ON, Canada; Research Group of Plant and Vegetation Ecology (PLECO), Department of Biology, University of Antwerp, Wilrijk, Belgium; Laboratoire des Sciences du Climat et de l'Environnement, IPSL, Gif-sur-Yvette, France; Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing, China

Recommended Citation:
Sardans J.,Grau O.,Chen H.Y.H.,et al. Changes in nutrient concentrations of leaves and roots in response to global change factors[J]. Global Change Biology,2017-01-01,23(9)
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