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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1111/gcb.14365
|2 doi
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|a pubmed24n0953.xml
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Andrieux, Benjamin
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Drivers of postfire soil organic carbon accumulation in the boreal forest
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 24.01.2019
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|a Date Revised 24.01.2019
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2018 John Wiley & Sons Ltd.
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|a 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
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a boreal forest
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|a carbon dynamic
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| 650 |
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|a carbon sequestration
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| 650 |
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|a carbon stock
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| 650 |
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|a climate change
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| 650 |
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4 |
|a fire
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| 650 |
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4 |
|a soil carbon
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| 650 |
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|a Soil
|2 NLM
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| 650 |
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|a Water
|2 NLM
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| 650 |
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7 |
|a 059QF0KO0R
|2 NLM
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| 650 |
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|a Carbon
|2 NLM
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| 650 |
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7 |
|a 7440-44-0
|2 NLM
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| 700 |
1 |
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|a Beguin, Julien
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Bergeron, Yves
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Grondin, Pierre
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Paré, David
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Global change biology
|d 1999
|g 24(2018), 10 vom: 02. Okt., Seite 4797-4815
|w (DE-627)NLM098239996
|x 1365-2486
|7 nnns
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| 773 |
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|g volume:24
|g year:2018
|g number:10
|g day:02
|g month:10
|g pages:4797-4815
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|u http://dx.doi.org/10.1111/gcb.14365
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