DOI: 10.1111/gcb.13012
论文题名: Deep soil carbon dynamics are driven more by soil type than by climate: A worldwide meta-analysis of radiocarbon profiles
作者: Mathieu J.A. ; Hatté C. ; Balesdent J. ; Parent E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 11 起始页码: 4278
结束页码: 4292
语种: 英语
英文关键词: Organic carbon dynamics
; Radiocarbon
; Soil profile
; Statistical meta-analysis
Scopus关键词: biodegradation
; carbon isotope
; climate effect
; cultivation
; land use change
; meta-analysis
; organic carbon
; pedology
; soil carbon
; soil profile
; soil type
; topsoil
; carbon
; soil
; chemical model
; chemistry
; climate
; climate change
; ecosystem
; meta analysis
; metabolism
; soil
; Carbon
; Carbon Radioisotopes
; Climate
; Climate Change
; Ecosystem
; Models, Chemical
; Soil
英文摘要: The response of soil carbon dynamics to climate and land-use change will affect both the future climate and the quality of ecosystems. Deep soil carbon (>20 cm) is the primary component of the soil carbon pool, but the dynamics of deep soil carbon remain poorly understood. Therefore, radiocarbon activity (Δ14C), which is a function of the age of carbon, may help to understand the rates of soil carbon biodegradation and stabilization. We analyzed the published 14C contents in 122 profiles of mineral soil that were well distributed in most of the large world biomes, except for the boreal zone. With a multivariate extension of a linear mixed-effects model whose inference was based on the parallel combination of two algorithms, the expectation-maximization (EM) and the Metropolis-Hasting algorithms, we expressed soil Δ14C profiles as a four-parameter function of depth. The four-parameter model produced insightful predictions of soil Δ14C as dependent on depth, soil type, climate, vegetation, land-use and date of sampling (R2=0.68). Further analysis with the model showed that the age of topsoil carbon was primarily affected by climate and cultivation. By contrast, the age of deep soil carbon was affected more by soil taxa than by climate and thus illustrated the strong dependence of soil carbon dynamics on other pedologic traits such as clay content and mineralogy. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61887
Appears in Collections: 影响、适应和脆弱性
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作者单位: Laboratoire des Sciences du Climat et de l'Environnement, UMR 8212 CEA-CNRS-UVSQ, Gif-sur-Yvette, France; INRA, UR1119 Géochimie des Sols et des Eaux, Aix-en-Provence, France; INRA, UMR 518 Mathématiques et Informatiques Appliquées, Paris, France; AgroParisTech, UMR 518 Mathématiques et Informatiques Appliquées, Paris, France; Laboratoire dEtudes du Rayonnement et de la Matiere en Astrophysique et Athmosphére, UMR 8112, Observatoire de Paris, Paris, France
Recommended Citation:
Mathieu J.A.,Hatté C.,Balesdent J.,et al. Deep soil carbon dynamics are driven more by soil type than by climate: A worldwide meta-analysis of radiocarbon profiles[J]. Global Change Biology,2015-01-01,21(11)