Abstract:
:The lack of microbial genomes and isolates from the deep seabed means that very little is known about the ecology of this vast habitat. Here, we investigate energy and carbon acquisition strategies of microbial communities from three deep seabed petroleum seeps (3 km water depth) in the Eastern Gulf of Mexico. Shotgun metagenomic analysis reveals that each sediment harbors diverse communities of chemoheterotrophs and chemolithotrophs. We recovered 82 metagenome-assembled genomes affiliated with 21 different archaeal and bacterial phyla. Multiple genomes encode enzymes for anaerobic oxidation of aliphatic and aromatic compounds, including those of candidate phyla Aerophobetes, Aminicenantes, TA06 and Bathyarchaeota. Microbial interactions are predicted to be driven by acetate and molecular hydrogen. These findings are supported by sediment geochemistry, metabolomics, and thermodynamic modelling. Overall, we infer that deep-sea sediments experiencing thermogenic hydrocarbon inputs harbor phylogenetically and functionally diverse communities potentially sustained through anaerobic hydrocarbon, acetate and hydrogen metabolism.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Dong X,Greening C,Rattray JE,Chakraborty A,Chuvochina M,Mayumi D,Dolfing J,Li C,Brooks JM,Bernard BB,Groves RA,Lewis IA,Hubert CRJdoi
10.1038/s41467-019-09747-0subject
Has Abstractpub_date
2019-04-18 00:00:00pages
1816issue
1issn
2041-1723pii
10.1038/s41467-019-09747-0journal_volume
10pub_type
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