← Back to Communities

Asgard Archaea Wetland Soil Methanogenesis-Substrate Community

Community ID CommunityMech:000219
Ecological State STABLE
Environment wetland soil
ENVO:00000044

A wetland soil community in which terrestrial Asgard archaea modulate potential methanogenesis substrates. Two complete genomes were reconstructed for soil-associated Atabeyarchaeia, a newly defined Asgard lineage, alongside a complete genome for Freyarchaeia. Metatranscriptomic data show in situ expression of [NiFe]-hydrogenases, pyruvate oxidation, Wood-Ljungdahl-pathway carbon fixation, amino acid metabolism, anaerobic aldehyde oxidation, hydrogen peroxide detoxification, and carbohydrate breakdown to acetate and formate. Soil-associated Asgard archaea are predicted to act as non-methanogenic acetogens, suggesting they compete with methanogens for shared substrates (H2, acetate, formate) and shape terrestrial carbon cycling.

Taxonomy

Taxon Ontology ID Functional Roles Abundance
Atabeyarchaeia (Asgard) NCBITaxon:1655434
PRIMARY_DEGRADER SECONDARY_FERMENTER
N/A
  • PMID:39085194 - SUPPORT (IN_VIVO)
    "two complete genomes for soil-associated Atabeyarchaeia, a new Asgard lineage"
Freyarchaeia (Asgard) NCBITaxon:1655434
PRIMARY_DEGRADER
N/A
  • PMID:39085194 - SUPPORT (IN_VIVO)
    "a complete genome of Freyarchaeia"
wetland soil methanogens NCBITaxon:2157
PRIMARY_PRODUCER
N/A
  • PMID:39085194 - SUPPORT (IN_VIVO)
    "Asgard archaea modulate potential methanogenesis substrates in wetland soil"

Ecological Interactions

Ecological interaction network for Asgard Archaea Wetland Soil Methanogenesis-Substrate Community Bipartite graph where circle nodes represent taxa and colored rectangles represent ecological interactions (cross-feeding, mutualism, syntrophy, competition, commensalism).
Taxon
Cross-feeding
Mutualism
Syntrophy
Competition
Commensalism
Niche partitioning
Colonization facilitation
Strain competition
Predation

Asgard Acetogenesis Competes for Methanogenic Substrates

COMPETITION

Source Taxon: Atabeyarchaeia (Asgard)

Target Taxon: wetland soil methanogens

Metabolites: dihydrogen (CHEBI:18276), acetate (CHEBI:30089), formate (CHEBI:15740)

Biological Processes:

Evidence

  • PMID:39085194 - SUPPORT (IN_VIVO)
    "soil-associated Asgard archaea are predicted to include non-methanogenic acetogens"

Wood-Ljungdahl Carbon Fixation and Hydrogen Cycling

CROSS_FEEDING

Metabolites: dihydrogen (CHEBI:18276), carbon dioxide (CHEBI:16526)

Biological Processes:

Evidence

  • PMID:39085194 - SUPPORT (IN_VIVO)
    "expression of genes..hydrogenases, pyruvate oxidation and carbon fixation via the Wood-Ljungdahl pathway"

Carbohydrate Breakdown to Acetate and Formate

CROSS_FEEDING

Metabolites: acetate (CHEBI:30089), formate (CHEBI:15740)

Biological Processes:

Evidence

  • PMID:39085194 - SUPPORT (IN_VIVO)
    "carbohydrate breakdown to acetate and formate"

External Resources

Name Repository Resource ID
Primary publication for the Asgard wetland soil methanogenesis-substrate community
PubMed record for the Valentin-Alvarado et al. 2024 Nat Commun paper on Asgard archaeal contributions to wetland-soil methanogenesis substrate cycling. 		OTHER PMID:39085194
  • PMID:39085194 - SUPPORT (IN_VIVO)
    "Asgard archaea modulate potential methanogenesis substrates"
DOI landing page
DOI link to the Nature Communications paper. 		OTHER doi:10.1038/s41467-024-49872-z

Environmental Factors

Factor Value Unit
Wetland soil anaerobic niche wetland soil N/A
  • PMID:39085194 - SUPPORT (IN_VIVO)
    "contributions in soil ecosystems remain unknown"