DOI: 10.1111/gcb.14365
Scopus记录号: 2-s2.0-85050856752
论文题名: Drivers of postfire soil organic carbon accumulation in the boreal forest
作者: Andrieux B. ; Beguin J. ; Bergeron Y. ; Grondin P. ; Paré D.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 10 起始页码: 4797
结束页码: 4815
语种: 英语
英文关键词: boreal forest
; carbon dynamic
; carbon sequestration
; carbon stock
; climate change
; fire
; soil carbon
Scopus关键词: bryophytes
英文摘要: The accumulation of soil carbon (C) is regulated by a complex interplay between abiotic and biotic factors. Our study aimed to identify the main drivers of soil C accumulation in the boreal forest of eastern North America. Ecosystem C pools were measured in 72 sites of fire origin that burned 2–314 years ago over a vast region with a range of ∆ mean annual temperature of 3°C and one of ∆ 500 mm total precipitation. We used a set of multivariate a priori causal hypotheses to test the influence of time since fire (TSF), climate, soil physico-chemistry and bryophyte dominance on forest soil organic C accumulation. Integrating the direct and indirect effects among abiotic and biotic variables explained as much as 50% of the full model variability. The main direct drivers of soil C stocks were: TSF >bryophyte dominance of the FH layer and metal oxide content >pH of the mineral soil. Only climate parameters related to water availability contributed significantly to explaining soil C stock variation. Importantly, climate was found to affect FH layer and mineral soil C stocks indirectly through its effects on bryophyte dominance and organo-metal complexation, respectively. Soil texture had no influence on soil C stocks. Soil C stocks increased both in the FH layer and mineral soil with TSF and this effect was linked to a decrease in pH with TSF in mineral soil. TSF thus appears to be an important factor of soil development and of C sequestration in mineral soil through its influence on soil chemistry. Overall, this work highlights that integrating the complex interplay between the main drivers of soil C stocks into mechanistic models of C dynamics could improve our ability to assess C stocks and better anticipate the response of the boreal forest to global change. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110207
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: NSERC-UQAT-UQAM Industrial Chair in Sustainable Forest Management, Forest Research Institute, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, QC, Canada; Canadian Forest Service, Laurentian Forestry Centre, Natural Resources Canada, Québec, QC, Canada; Canadian Wood Fibre Centre, Natural Resources Canada, Québec, QC, Canada; Direction de la recherche forestière, Ministère des Forêts, de la Faune et des Parcs du Québéc, Québec, QC, Canada
Recommended Citation:
Andrieux B.,Beguin J.,Bergeron Y.,et al. Drivers of postfire soil organic carbon accumulation in the boreal forest[J]. Global Change Biology,2018-01-01,24(10)