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Prokaryotic life in the deep ocean's water column
Herndl, G.J.; Bayer, B.; Baltar, F.; Reinthaler, T. (2022). Prokaryotic life in the deep ocean's water column. Ann. Rev. Mar. Sci. Early view. https://dx.doi.org/10.1146/annurev-marine-032122-115655
In: Annual Review of Marine Science. Annual Reviews: Palo Alto, Calif. ISSN 1941-1405; e-ISSN 1941-0611, meer
Peer reviewed article  

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Author keywords
    prokaryotes; deep ocean; microbial oceanography; metabolic activity; bacteria; archaea

Auteurs  Top 
  • Herndl, G.J., meer
  • Bayer, B.
  • Baltar, F.
  • Reinthaler, T.

Abstract
    The oceanic waters below a depth of 200 m represent, in terms of volume, the largest habitat of the biosphere, harboring approximately 70% of the prokaryotic biomass in the oceanic water column. These waters are characterized by low temperature, increasing hydrostatic pressure, and decreasing organic matter supply with depth. Recent methodological advances in microbial oceanography have refined our view of the ecology of prokaryotes in the dark ocean. Here, we review the ecology of prokaryotes of the dark ocean, present data on the biomass distribution and heterotrophic and chemolithoautotrophic prokaryotic production in the major oceanic basins, and highlight the phylogenetic and functional diversity of this part of the ocean. We describe the connectivity of surface and deep-water prokaryotes and the molecular adaptations of piezophilic prokaryotes to high hydrostatic pressure. We also highlight knowledge gaps in the ecology of the dark ocean's prokaryotes and their role in the biogeochemical cycles in the largest habitat of the biosphere.

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