Metagenomic insights into microbial community structure and metabolism in alpine permafrost on the Tibetan Plateau.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
14 Jul 2024
14 Jul 2024
Historique:
received:
01
12
2023
accepted:
05
07
2024
medline:
15
7
2024
pubmed:
15
7
2024
entrez:
14
7
2024
Statut:
epublish
Résumé
Permafrost, characterized by its frozen soil, serves as a unique habitat for diverse microorganisms. Understanding these microbial communities is crucial for predicting the response of permafrost ecosystems to climate change. However, large-scale evidence regarding stratigraphic variations in microbial profiles remains limited. Here, we analyze microbial community structure and functional potential based on 16S rRNA gene amplicon sequencing and metagenomic data obtained from an ∼1000 km permafrost transect on the Tibetan Plateau. We find that microbial alpha diversity declines but beta diversity increases down the soil profile. Microbial assemblages are primarily governed by dispersal limitation and drift, with the importance of drift decreasing but that of dispersal limitation increasing with soil depth. Moreover, genes related to reduction reactions (e.g., ferric iron reduction, dissimilatory nitrate reduction, and denitrification) are enriched in the subsurface and permafrost layers. In addition, microbial groups involved in alternative electron accepting processes are more diverse and contribute highly to community-level metabolic profiles in the subsurface and permafrost layers, likely reflecting the lower redox potential and more complicated trophic strategies for microorganisms in deeper soils. Overall, these findings provide comprehensive insights into large-scale stratigraphic profiles of microbial community structure and functional potentials in permafrost regions.
Identifiants
pubmed: 39004662
doi: 10.1038/s41467-024-50276-2
pii: 10.1038/s41467-024-50276-2
doi:
Substances chimiques
RNA, Ribosomal, 16S
0
Soil
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
5920Subventions
Organisme : National Natural Science Foundation of China (National Science Foundation of China)
ID : 31988102 and 31825006
Informations de copyright
© 2024. The Author(s).
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