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231225s2022 xx |||||o 00| ||eng c |
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|a 10.1111/gcb.15960
|2 doi
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|a pubmed24n1107.xml
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|a (DE-627)NLM332391485
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|a (NLM)34699094
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Schulte-Uebbing, Lena F
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Experimental evidence shows minor contribution of nitrogen deposition to global forest carbon sequestration
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 23.02.2022
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|a Date Revised 31.07.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd.
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|a Human activities have drastically increased nitrogen (N) deposition onto forests globally. This may have alleviated N limitation and thus stimulated productivity and carbon (C) sequestration in aboveground woody biomass (AGWB), a stable C pool with long turnover times. This 'carbon bonus' of human N use partly offsets the climate impact of human-induced N2 O emissions, but its magnitude and spatial variation are uncertain. Here we used a meta-regression approach to identify sources of heterogeneity in tree biomass C-N response (additional C stored per unit of N) based on data from fertilization experiments in global forests. We identified important drivers of spatial variation in forest biomass C-N response related to climate (potential evapotranspiration), soil fertility (N content) and tree characteristics (stand age), and used these relationships to quantify global spatial variation in N-induced forest biomass C sequestration. Results show that N deposition enhances biomass C sequestration in only one-third of global forests, mainly in the boreal region, while N reduces C sequestration in 5% of forests, mainly in the tropics. In the remaining 59% of global forests, N addition has no impact on biomass C sequestration. Average C-N responses were 11 (4-21) kg C per kg N for boreal forests, 4 (0-8) kg C per kg N for temperate forests and 0 (-4 to 5) kg C per kg N for tropical forests. Our global estimate of the N-induced forest biomass C sink of 41 (-53 to 159) Tg C yr-1 is substantially lower than previous estimates, mainly due to the absence of any response in most tropical forests (accounting for 58% of the global forest area). Overall, the N-induced C sink in AGWB only offsets ~5% of the climate impact of N2 O emissions (in terms of 100-year global warming potential), and contributes ~1% to the gross forest C sink
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|a Journal Article
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4 |
|a C-N response
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4 |
|a N2O emissions
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| 650 |
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4 |
|a aboveground woody biomass
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| 650 |
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4 |
|a climate footprint
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| 650 |
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4 |
|a forest carbon sink
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| 650 |
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4 |
|a global warming potential
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| 650 |
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|a meta-regression
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| 650 |
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4 |
|a nitrogen deposition
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| 650 |
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4 |
|a spatial variation
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| 650 |
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7 |
|a Carbon
|2 NLM
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| 650 |
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7 |
|a 7440-44-0
|2 NLM
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| 650 |
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|a Nitrogen
|2 NLM
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| 650 |
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7 |
|a N762921K75
|2 NLM
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| 700 |
1 |
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|a Ros, Gerard H
|e verfasserin
|4 aut
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| 700 |
1 |
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|a de Vries, Wim
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Global change biology
|d 1999
|g 28(2022), 3 vom: 07. Feb., Seite 899-917
|w (DE-627)NLM098239996
|x 1365-2486
|7 nnns
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| 773 |
1 |
8 |
|g volume:28
|g year:2022
|g number:3
|g day:07
|g month:02
|g pages:899-917
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| 856 |
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|u http://dx.doi.org/10.1111/gcb.15960
|3 Volltext
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|a AR
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|d 28
|j 2022
|e 3
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|c 02
|h 899-917
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