Disentangling the mechanisms shaping the surface ocean microbiota.
Type
ArticleAuthors
Logares, RamiroDeutschmann, Ina M
Junger, Pedro C
Giner, Caterina R
Krabberød, Anders K
Schmidt, Thomas S B
Rubinat-Ripoll, Laura
Mestre, Mireia
Salazar, Guillem
Ruiz-González, Clara
Sebastián, Marta
de Vargas, Colomban
Acinas, Silvia G
Duarte, Carlos M.

Gasol, Josep M
Massana, Ramon
KAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionMarine Science Program
Red Sea Research Center (RSRC)
Date
2020-04-20Online Publication Date
2020-04-20Print Publication Date
2020-12Submitted Date
2019-11-10Permanent link to this record
http://hdl.handle.net/10754/662649
Metadata
Show full item recordAbstract
BACKGROUND:The ocean microbiota modulates global biogeochemical cycles and changes in its configuration may have large-scale consequences. Yet, the underlying ecological mechanisms structuring it are unclear. Here, we investigate how fundamental ecological mechanisms (selection, dispersal and ecological drift) shape the smallest members of the tropical and subtropical surface-ocean microbiota: prokaryotes and minute eukaryotes (picoeukaryotes). Furthermore, we investigate the agents exerting abiotic selection on this assemblage as well as the spatial patterns emerging from the action of ecological mechanisms. To explore this, we analysed the composition of surface-ocean prokaryotic and picoeukaryotic communities using DNA-sequence data (16S- and 18S-rRNA genes) collected during the circumglobal expeditions Malaspina-2010 and TARA-Oceans. RESULTS:We found that the two main components of the tropical and subtropical surface-ocean microbiota, prokaryotes and picoeukaryotes, appear to be structured by different ecological mechanisms. Picoeukaryotic communities were predominantly structured by dispersal-limitation, while prokaryotic counterparts appeared to be shaped by the combined action of dispersal-limitation, selection and drift. Temperature-driven selection appeared as a major factor, out of a few selected factors, influencing species co-occurrence networks in prokaryotes but not in picoeukaryotes, indicating that association patterns may contribute to understand ocean microbiota structure and response to selection. Other measured abiotic variables seemed to have limited selective effects on community structure in the tropical and subtropical ocean. Picoeukaryotes displayed a higher spatial differentiation between communities and a higher distance decay when compared to prokaryotes, consistent with a scenario of higher dispersal limitation in the former after considering environmental heterogeneity. Lastly, random dynamics or drift seemed to have a more important role in structuring prokaryotic communities than picoeukaryotic counterparts. CONCLUSIONS:The differential action of ecological mechanisms seems to cause contrasting biogeography, in the tropical and subtropical ocean, among the smallest surface plankton, prokaryotes and picoeukaryotes. This suggests that the idiosyncrasy of the main constituents of the ocean microbiota should be considered in order to understand its current and future configuration, which is especially relevant in a context of global change, where the reaction of surface ocean plankton to temperature increase is still unclear. Video Abstract.Citation
Logares, R., Deutschmann, I. M., Junger, P. C., Giner, C. R., Krabberød, A. K., Schmidt, T. S. B., … Massana, R. (2020). Disentangling the mechanisms shaping the surface ocean microbiota. Microbiome, 8(1). doi:10.1186/s40168-020-00827-8Sponsors
We thank all scientists from the Malaspina 2010 expedition and crews from the R/V Hespérides. Bioinformatics analyses were performed at the MARBITS platform of the Institut de Ciències del Mar (ICM; http://marbits.icm.csic.es) as well as in MareNostrum (Barcelona Supercomputing Center) via grants obtained from the Spanish Network of Supercomputing (RES) to RL. We thank the CSIC Open Access Publication Support Initiative through the Unit of Information Resources for Research (URICI) for helping to cover publication feesPublisher
Springer NatureJournal
MicrobiomePubMed ID
32312331PubMed Central ID
PMC7171866Additional Links
https://microbiomejournal.biomedcentral.com/articles/10.1186/s40168-020-00827-8https://microbiomejournal.biomedcentral.com/track/pdf/10.1186/s40168-020-00827-8
ae974a485f413a2113503eed53cd6c53
10.1186/s40168-020-00827-8
Scopus Count
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