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Título: | Global diversity and biogeography of deep-sea pelagic prokaryotes |
Autor: | Salazar, Guillem CSIC ORCID; Cornejo-Castillo, Francisco M. CSIC ORCID; Benítez Barrios, Verónica CSIC; Fraile-Nuez, Eugenio ; Álvarez-Salgado, Xosé Antón CSIC ORCID ; Duarte, Carlos M. CSIC ORCID; Gasol, Josep M. CSIC ORCID ; Acinas, Silvia G. CSIC ORCID | Fecha de publicación: | 2016 | Editor: | International Society for Microbial Ecology | Citación: | ISME Journal 10: 596-608 (2016) | Resumen: | 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 | Descripción: | 13 pages, 6 figures, 1 table, supplementary Information http://www.nature.com/ismej/journal/v10/n3/suppinfo/ismej2015137s1.html | Versión del editor: | https://doi.org/10.1038/ismej.2015.137 | URI: | http://hdl.handle.net/10261/130898 | DOI: | 10.1038/ismej.2015.137 | Identificadores: | issn: 1751-7362 e-issn: 1751-7370 |
Aparece en las colecciones: | (ICM) Artículos (IMEDEA) Artículos (IIM) Artículos (IEO) Artículos |
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