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Gene-centered metagenome analysis of Vulcano Island soil (Aeolian archipelago, Italy) reveals diverse microbial key players in methane, hydrogen and sulfur cycles
Angius, F.; Cremers, G.; Frank, J.; Witkowski, C.R.; Pol, A.; van Alen, T.A.; Jetten, M.S.M.; Op den Camp, H.J.M.; Berben, T. (2024). Gene-centered metagenome analysis of Vulcano Island soil (Aeolian archipelago, Italy) reveals diverse microbial key players in methane, hydrogen and sulfur cycles. Antonie van Leeuwenhoek 117(1): 94. https://dx.doi.org/10.1007/s10482-024-01995-5
In: Antonie van Leeuwenhoek. Stichting Antonie van Leeuwenhoek: Amsterdam. ISSN 0003-6072; e-ISSN 1572-9699, meer
Peer reviewed article  
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Author keywords
    Volcanic soil; Hydrogen sulfde; Metagenome; Metabolic reconstruction
Auteurs  Top 
  • Angius, F.
  • Cremers, G.
  • Frank, J.
  • Witkowski, C.R., meer
  • Pol, A.
  • van Alen, T.A.
  • Jetten, M.S.M.
  • Op den Camp, H.J.M.
  • Berben, T.
Abstract
    The Aeolian archipelago is known worldwide for its volcanic activity and hydrothermal emissions, of mainly carbon dioxide and hydrogen sulfide. Hydrogen, methane, and carbon monoxide are minor components of these emissions which together can feed large quantities of bacteria and archaea that do contribute to the removal of these notorious greenhouse gases. Here we analyzed the metagenome of samples taken from the Levante bay on Vulcano Island, Italy. Using a gene-centric approach, the hydrothermal vent community appeared to be dominated by Proteobacteria, and Sulfurimonas was the most abundant genus. Metabolic reconstructions highlight a prominent role of formaldehyde oxidation and the reverse TCA cycle in carbon fixation. [NiFe]-hydrogenases seemed to constitute the preferred strategy to oxidize H2, indicating that besides H2S, H2 could be an essential electron donor in this system. Moreover, the sulfur cycle analysis showed a high abundance and diversity of sulfate reduction genes underpinning the H2S production. This study covers the diversity and metabolic potential of the microbial soil community in Levante bay and adds to our understanding of the biogeochemistry of volcanic ecosystems.
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