@misc{10481/64160,
year = {2020},
month = {4},
url = {http://hdl.handle.net/10481/64160},
abstract = {Deep ocean microbial communities rely on the organic carbon produced in the sunlit
ocean, yet it remains unknown whether surface processes determine the assembly
and function of bathypelagic prokaryotes to a larger extent than deep-sea physicochemical
conditions. Here, we explored whether variations in surface phytoplankton
assemblages across Atlantic, Pacific and Indian ocean stations can explain structural
changes in bathypelagic (ca. 4,000 m) free-living and particle-attached prokaryotic
communities (characterized through 16S rRNA gene sequencing), as well as changes
in prokaryotic activity and dissolved organic matter (DOM) quality. We show that
the spatial structuring of prokaryotic communities in the bathypelagic strongly followed
variations in the abundances of surface dinoflagellates and ciliates, as well as
gradients in surface primary productivity, but were less influenced by bathypelagic
physicochemical conditions. Amino acid-like DOM components in the bathypelagic
reflected variations of those components in surface waters, and seemed to control
bathypelagic prokaryotic activity. The imprint of surface conditions was more evident
in bathypelagic than in shallower mesopelagic (200–1,000 m) communities, suggesting
a direct connectivity through fast-sinking particles that escape mesopelagic
transformations. Finally, we identified a pool of endemic deep-sea prokaryotic taxa
(including potentially chemoautotrophic groups) that appear less connected to surface
processes than those bathypelagic taxa with a widespread vertical distribution. Our results suggest that surface planktonic communities shape the spatial structure
of the bathypelagic microbiome to a larger extent than the local physicochemical environment,
likely through determining the nature of the sinking particles and the associated
prokaryotes reaching bathypelagic waters.},
organization = {Spanish Ministry of Economy and Competitiveness (MINECO) through the Consolider-Ingenio program (Malaspina 2010 Expedition) (FEDER funds) 	
CSD2008-00077
CTM2015-70340R
CTM2015-65720-R
CTM2015-69936-P
RTI2018-101025-B-I00
UCE.PP2017.03
CTM2015-69392-C3-2-R},
organization = {King Abdullah University of Science & Technology},
organization = {Juan de la Cierva fellowship},
organization = {GRAMMI project 	
IJCI-2015-23505
RTI2018-099740-J-I00},
organization = {Viera y Clavijo contract - ACIISI},
organization = {ULPGC},
organization = {Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)

FONDAP-IDEAL15150003
FONDECYT-POSTDOCTORADO 3190369},
publisher = {Wiley},
keywords = {Bacterial activity},
keywords = {Carbon export},
keywords = {Deep ocean},
keywords = {Fluorescent dissolved},
keywords = {Organic matter},
keywords = {Marine prokaryotic communities},
keywords = {Microbial dispersal},
keywords = {Particle sinking},
keywords = {Particle-attached},
keywords = {Surface phytoplankton},
title = {Major imprint of surface plankton on deep ocean prokaryotic structure and activity},
doi = {10.1111/mec.15454},
author = {Ruiz González, Clara and Reche Cañabate, Isabel},
}