Global diversity and distribution of aerobic anoxygenic phototrophs in the tropical and subtropical oceans
Gazulla, Carlota R. (Universitat Autònoma de Barcelona. Departament de Genètica i de Microbiologia)
Auladell, Adrià (Institut de Ciències del Mar)
Ruiz González, Clara (Institut de Ciències del Mar)
Junger, Pedro C. (Universidade Federal de São Carlos. Departamento de Hidrobiologia)
Royo-Llonch, Marta (Institut de Ciències del Mar)
Duarte, Carlos M.. (King Abdullah University of Science and Technology)
Gasol, Josep M. (Institut de Ciències del Mar)
Sánchez Martínez, M. Olga (Universitat Autònoma de Barcelona. Departament de Genètica i de Microbiologia.)
Ferrera, Isabel (Institut de Ciències del Mar)

Date:	2022
Abstract:	The aerobic anoxygenic phototrophic (AAP) bacteria are common in most marine environments but their global diversity and biogeography remain poorly characterized. Here, we analyzed AAP communities across 113 globally-distributed surface ocean stations sampled during the Malaspina Expedition in the tropical and subtropical ocean. By means of amplicon sequencing of the pufM gene, a genetic marker for this functional group, we show that AAP communities along the surface ocean were mainly composed of members of the Halieaceae (Gammaproteobacteria), which were adapted to a large range of environmental conditions, and of different clades of the Alphaproteobacteria, which seemed to dominate under particular circumstances, such as in the oligotrophic gyres. AAP taxa were spatially structured within each of the studied oceans, with communities from adjacent stations sharing more taxonomic similarities. AAP communities were composed of a large pool of rare members and several habitat specialists. When compared to the surface ocean prokaryotic and picoeukaryotic communities, it appears that AAP communities display an idiosyncratic global biogeographical pattern, dominated by selection processes and less influenced by dispersal limitation. Our study contributes to the understanding of how AAP communities are distributed in the horizontal dimension and the mechanisms underlying their distribution across the global surface ocean.
Grants:	Ministerio de Ciencia e Innovación CEX2019-000928-S Agencia Estatal de Investigación PID2019-110128RB-I00 Agencia Estatal de Investigación RTI2018-101025-B-I00 Agencia Estatal de Investigación RTI2018-099740-J-I00 Ministerio de Economía y Competitividad CSD2008-00077
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Published in:	Environmental Microbiology, Propera publicació 2022, ISSN 1462-2920

DOI: 10.1111/1462-2920.15835
PMID: 35084095

Preprint 36 p, 760.6 KB

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