dc.contributor.author
Tang, Bo
dc.contributor.author
Rocci, Katherine S.
dc.contributor.author
Lehmann, Anika
dc.contributor.author
Rillig, Matthias C.
dc.date.accessioned
2023-04-12T06:05:59Z
dc.date.available
2023-04-12T06:05:59Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/37864
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-37577
dc.description.abstract
Nitrogen (N) availability has been considered as a critical factor for the cycling and storage of soil organic carbon (SOC), but effects of N enrichment on the SOC pool appear highly variable. Given the complex nature of the SOC pool, recent frameworks suggest that separating this pool into different functional components, for example, particulate organic carbon (POC) and mineral-associated organic carbon (MAOC), is of great importance for understanding and predicting SOC dynamics. Importantly, little is known about how these N-induced changes in SOC components (e.g., changes in the ratios among these fractions) would affect the functionality of the SOC pool, given the differences in nutrient density, resistance to disturbance, and turnover time between POC and MAOC pool. Here, we conducted a global meta-analysis of 803 paired observations from 98 published studies to assess the effect of N addition on these SOC components, and the ratios among these fractions. We found that N addition, on average, significantly increased POC and MAOC pools by 16.4% and 3.7%, respectively. In contrast, both the ratios of MAOC to SOC and MAOC to POC were remarkably decreased by N enrichment (4.1% and 10.1%, respectively). Increases in the POC pool were positively correlated with changes in aboveground plant biomass and with hydrolytic enzymes. However, the positive responses of MAOC to N enrichment were correlated with increases in microbial biomass. Our results suggest that although reactive N deposition could facilitate soil C sequestration to some extent, it might decrease the nutrient density, turnover time, and resistance to disturbance of the SOC pool. Our study provides mechanistic insights into the effects of N enrichment on the SOC pool and its functionality at global scale, which is pivotal for understanding soil C dynamics especially in future scenarios with more frequent and severe perturbations.
en
dc.format.extent
13 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
global change
en
dc.subject
meta-analysis
en
dc.subject
mineral-associated organic carbon
en
dc.subject
nitrogen deposition
en
dc.subject
particulate organic carbon
en
dc.subject
soil organic carbon
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie
dc.title
Nitrogen increases soil organic carbon accrual and alters its functionality
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.1111/gcb.16588
dcterms.bibliographicCitation.journaltitle
Global Change Biology
dcterms.bibliographicCitation.number
7
dcterms.bibliographicCitation.pagestart
1971
dcterms.bibliographicCitation.pageend
1983
dcterms.bibliographicCitation.volume
29
dcterms.bibliographicCitation.url
https://doi.org/10.1111/gcb.16588
refubium.affiliation
Biologie, Chemie, Pharmazie
refubium.affiliation.other
Institut für Biologie
refubium.funding
DEAL Wiley
refubium.note.author
Die Publikation wurde aus Open Access Publikationsgeldern der Freien Universität Berlin gefördert.
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1365-2486