Uncovering diversity and abundance patterns of CO2-fixing microorganisms in peatlands

Microorganisms play a crucial role in the carbon (C) dynamics of peatlands — a major terrestrial C reservoir. Because of their role in C emissions, heterotrophic microorganisms have attracted much attention over the past decades. CO 2 -fixing microorganisms (CFMs) remained largely overlooked, while...

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Bibliographic Details
Published in:Npj Biodiversity Vol. 4; no. 1; pp. 30 - 12
Main Authors: Le Geay, Marie, Mayers, Kyle, Sytiuk, Anna, Dorrepaal, Ellen, Küttim, Martin, Lamentowicz, Mariusz, Tuittila, Eeva-Stiina, Lauga, Béatrice, Jassey, Vincent E. J.
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 04.08.2025
Springer Nature B.V
Nature
Nature Portfolio
Subjects:
631/158/2452
631/158/853
631/158/855
Abundance
Animal Systematics/Taxonomy/Biogeography
Biodiversity
Biodiversity and Ecology
Biomedical and Life Sciences
Carbon
Carbon dioxide
Climate Change/Climate Change Impacts
Community structure
Decomposition
Discriminant analysis
Ecology
Ecology, environment
Ecosystems
Emissions
Environmental Management
Environmental Sciences
Fixing
Genes
Geographical distribution
Heterotrophic microorganisms
Life Sciences
Metabolism
Metabolites
Microbiology and Parasitology
Microbiomes
Microorganisms
Nutrients
Peatlands
Plant Systematics/Taxonomy/Biogeography
Precipitation
Principal components analysis
Respiration
ISSN:2731-4243, 2731-4243
Online Access:Get full text
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Summary:Microorganisms play a crucial role in the carbon (C) dynamics of peatlands — a major terrestrial C reservoir. Because of their role in C emissions, heterotrophic microorganisms have attracted much attention over the past decades. CO 2 -fixing microorganisms (CFMs) remained largely overlooked, while they could attenuate C emissions. Here, we use metabarcoding and digital droplet PCR to survey microorganisms that potentially fix CO 2 in different peatlands. We demonstrate that CFMs are abundant and diverse in peatlands, with on average 1021 CFMs contributing up to 40% of the total bacterial abundance. Using a joint-species distribution model, we identified a core and a specific CFM microbiome, the latter being influenced by temperature and nutrients. Our findings highlight that ASV richness and community structure were direct drivers of CFM abundance, while environmental parameters were indirect drivers. These results provide the basis for a better understanding of the role of CFMs in peatland C cycle inputs.
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ISSN:2731-4243
2731-4243
DOI:10.1038/s44185-025-00099-1