Dataset Information

Global diversity and biogeography of deep-sea pelagic prokaryotes.

ABSTRACT: The deep-sea is the largest biome of the biosphere, and contains more than half of the whole ocean's microbes. Uncovering their general patterns of diversity and community structure at a global scale remains a great challenge, as only fragmentary information of deep-sea microbial diversity exists based on regional-scale studies. Here we report the first globally comprehensive survey of the prokaryotic communities inhabiting the bathypelagic ocean using high-throughput sequencing of the 16S rRNA gene. This work identifies the dominant prokaryotes in the pelagic deep ocean and reveals that 50% of the operational taxonomic units (OTUs) belong to previously unknown prokaryotic taxa, most of which are rare and appear in just a few samples. We show that whereas the local richness of communities is comparable to that observed in previous regional studies, the global pool of prokaryotic taxa detected is modest (~3600 OTUs), as a high proportion of OTUs are shared among samples. The water masses appear to act as clear drivers of the geographical distribution of both particle-attached and free-living prokaryotes. In addition, we show that the deep-oceanic basins in which the bathypelagic realm is divided contain different particle-attached (but not free-living) microbial communities. The combination of the aging of the water masses and a lack of complete dispersal are identified as the main drivers for this biogeographical pattern. All together, we identify the potential of the deep ocean as a reservoir of still unknown biological diversity with a higher degree of spatial complexity than hitherto considered.

SUBMITTER: Salazar G

PROVIDER: S-EPMC4817678 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature

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Global diversity and biogeography of deep-sea pelagic prokaryotes.

Salazar Guillem G Cornejo-Castillo Francisco M FM Benítez-Barrios Verónica V Fraile-Nuez Eugenio E Álvarez-Salgado X Antón XA Duarte Carlos M CM Gasol Josep M JM Acinas Silvia G SG

The ISME journal 20150807 3

The deep-sea is the largest biome of the biosphere, and contains more than half of the whole ocean's microbes. Uncovering their general patterns of diversity and community structure at a global scale remains a great challenge, as only fragmentary information of deep-sea microbial diversity exists based on regional-scale studies. Here we report the first globally comprehensive survey of the prokaryotic communities inhabiting the bathypelagic ocean using high-throughput sequencing of the 16S rRNA ...[more]

PMID: 26251871

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Dataset Information

Global diversity and biogeography of deep-sea pelagic prokaryotes.

Publications

Global diversity and biogeography of deep-sea pelagic prokaryotes.

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