Home
Deutsch
Advanced Search
Browse by ...
Publication overview
Contact persons
Help
DOI
PMC
 |
|
Open Access Green as soon as Postprint is submitted to ZB.
Impaired sustainability of thawing permafrost peatland ecosystems by Siberian alder colonization.
Curr. Biol. 35, 5683-5695.e5 (2025)
Anthropogenic climate warming causes thawing of permafrost soil in pan-Arctic areas of the Northern Hemisphere, thereby triggering changes in ecosystem biodiversity and biogeochemistry. Here, we analyzed the consequences of Siberian alder colonization for the thawing of permafrost soil, soil microbial biodiversity, and the performance of neighboring peatland vegetation. We show, for the first time, that heat dissipation from biological nitrogen fixation (BNF) by alder-Frankia symbiosis in numerous nodule clusters accelerates the thawing of permafrost soil in alder forests. On an areal basis, a rough estimate of heat dissipation from BNF amounts to 4,330-34,630 MJ year-1 per hectare. The maximum value of this estimate is of the same order of magnitude as the reported areal heat dissipation from microbial organic matter decomposition and accounts for ∼7.6% of the heat dissipation from this decomposition. Colonization by Siberian alder trees strongly modified microbial biodiversity in the top peat and organic soil layers and had nursing effects on dominant peatland plant species neighboring alder forests, as indicated by carbon and nitrogen stable isotope signatures. These results reveal the mechanism of permafrost soil thawing attributed to BNF-mediated heat dissipation by Siberian alder forests at both the site-specific and ecosystem levels. They complement present knowledge on microbial-decomposition-driven soil heating and carbon release in permafrost regions under global warming. In addition, they show that colonization by Siberian alder has significant feedback on climate-change-mediated thawing of permafrost soil, thereby impairing the sustainability of pan-Arctic peatland ecosystems.
Altmetric
Additional Metrics?
Edit extra informations
Login
Publication type
Article: Journal article
Document type
Scientific Article
Keywords
N(2) Fixation ; Siberian Alder-frankia Symbiosis ; Climate Change ; Pan-arctic Peatland ; Permafrost Soil Thawing ; Rhizosphere Microbiome; Active-layer Thickness; Nitrogen-fixation; Actinorhizal Symbioses; Organic-matter; Climate-change; Sea-ice; Carbon; Alaska; Soil; Temperature
ISSN (print) / ISBN
0960-9822
e-ISSN
1879-0445
Journal
Current Biology
Quellenangaben
Volume: 35,
Issue: 23,
Pages: 5683-5695.e5
Publisher
Elsevier
Publishing Place
50 Hampshire St, Floor 5, Cambridge, Ma 02139 Usa
Reviewing status
Peer reviewed
Institute(s)
Research Unit Comparative Microbiome Analysis (COMI)
Grants
Prominent Scientist Program" of Chongqing Talents, China
Double-First Class" Initiative Program for Foreign Talents of Southwest University
Double-First Class" Initiative Program for Foreign Talents of Southwest University