More, smaller bacteria in response to ocean's warming?

Handle URI:
http://hdl.handle.net/10754/566135
Title:
More, smaller bacteria in response to ocean's warming?
Authors:
Moran, Xose Anxelu G. ( 0000-0002-9823-5339 ) ; Alonso-Sáez, Laura; Nogueira, Enrique; Ducklow, Hugh W.; González, Natalia; López-Urrutia, Ángel; Díaz-Pérez, Laura; Calvo-Díaz, Alejandra; Arandia-Gorostidi, Nestor; Huete-Stauffer, Tamara M.
Abstract:
Heterotrophic bacteria play a major role in organic matter cycling in the ocean. Although the high abundances and relatively fast growth rates of coastal surface bacterioplankton make them suitable sentinels of global change, past analyses have largely overlooked this functional group. Here, time series analysis of a decade of monthly observations in temperate Atlantic coastal waters revealed strong seasonal patterns in the abundance, size and biomass of the ubiquitous flow-cytometric groups of low (LNA) and high nucleic acid (HNA) content bacteria. Over this relatively short period, we also found that bacterioplankton cells were significantly smaller, a trend that is consistent with the hypothesized temperature-driven decrease in body size. Although decadal cell shrinking was observed for both groups, it was only LNA cells that were strongly coherent, with ecological theories linking temperature, abundance and individual size on both the seasonal and interannual scale. We explain this finding because, relative to their HNA counterparts, marine LNA bacteria are less diverse, dominated by members of the SAR11 clade. Temperature manipulation experiments in 2012 confirmed a direct effect of warming on bacterial size. Concurrent with rising temperatures in spring, significant decadal trends of increasing standing stocks (3% per year) accompanied by decreasing mean cell size (-1% per year) suggest a major shift in community structure, with a larger contribution of LNA bacteria to total biomass. The increasing prevalence of these typically oligotrophic taxa may severely impact marine foodwebs and carbon fluxes by an overall decrease in the efficiency of the biological pump. © 2014 The Author(s) Published by the Royal Society. All rights reserved.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Red Sea Research Center (RSRC); Marine Science Program; Microbial oceanography Research Group
Publisher:
The Royal Society
Journal:
Proceedings of the Royal Society B: Biological Sciences
Issue Date:
10-Jun-2015
DOI:
10.1098/rspb.2015.0371
Type:
Article
ISSN:
0962-8452; 1471-2954
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Marine Science Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorMoran, Xose Anxelu G.en
dc.contributor.authorAlonso-Sáez, Lauraen
dc.contributor.authorNogueira, Enriqueen
dc.contributor.authorDucklow, Hugh W.en
dc.contributor.authorGonzález, Nataliaen
dc.contributor.authorLópez-Urrutia, Ángelen
dc.contributor.authorDíaz-Pérez, Lauraen
dc.contributor.authorCalvo-Díaz, Alejandraen
dc.contributor.authorArandia-Gorostidi, Nestoren
dc.contributor.authorHuete-Stauffer, Tamara M.en
dc.date.accessioned2015-08-12T09:29:38Zen
dc.date.available2015-08-12T09:29:38Zen
dc.date.issued2015-06-10en
dc.identifier.issn0962-8452en
dc.identifier.issn1471-2954en
dc.identifier.doi10.1098/rspb.2015.0371en
dc.identifier.urihttp://hdl.handle.net/10754/566135en
dc.description.abstractHeterotrophic bacteria play a major role in organic matter cycling in the ocean. Although the high abundances and relatively fast growth rates of coastal surface bacterioplankton make them suitable sentinels of global change, past analyses have largely overlooked this functional group. Here, time series analysis of a decade of monthly observations in temperate Atlantic coastal waters revealed strong seasonal patterns in the abundance, size and biomass of the ubiquitous flow-cytometric groups of low (LNA) and high nucleic acid (HNA) content bacteria. Over this relatively short period, we also found that bacterioplankton cells were significantly smaller, a trend that is consistent with the hypothesized temperature-driven decrease in body size. Although decadal cell shrinking was observed for both groups, it was only LNA cells that were strongly coherent, with ecological theories linking temperature, abundance and individual size on both the seasonal and interannual scale. We explain this finding because, relative to their HNA counterparts, marine LNA bacteria are less diverse, dominated by members of the SAR11 clade. Temperature manipulation experiments in 2012 confirmed a direct effect of warming on bacterial size. Concurrent with rising temperatures in spring, significant decadal trends of increasing standing stocks (3% per year) accompanied by decreasing mean cell size (-1% per year) suggest a major shift in community structure, with a larger contribution of LNA bacteria to total biomass. The increasing prevalence of these typically oligotrophic taxa may severely impact marine foodwebs and carbon fluxes by an overall decrease in the efficiency of the biological pump. © 2014 The Author(s) Published by the Royal Society. All rights reserved.en
dc.publisherThe Royal Societyen
dc.subjectAtlantic Oceanen
dc.subjectBacterioplanktonen
dc.subjectGlobal warmingen
dc.subjectLong-term trendsen
dc.subjectTemperature– size relationshipsen
dc.subjectTime seriesen
dc.titleMore, smaller bacteria in response to ocean's warming?en
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.contributor.departmentMarine Science Programen
dc.contributor.departmentMicrobial oceanography Research Groupen
dc.identifier.journalProceedings of the Royal Society B: Biological Sciencesen
dc.relation.referencesMorán, X. A. G., Alonso-Sáez, L., Nogueira, E., Ducklow, H. W., González, N., López-Urrutia, Á., … Huete-Stauffer, T. M. (2015). Data from: More, smaller bacteria in response to ocean’s warming? (Version 1) [Data set]. Dryad Digital Repository. https://doi.org/10.5061/dryad.kh7nten
dc.relation.referencesDOI:10.5061/DRYAD.KH7NTen
dc.relation.referencesHANDLE:http://hdl.handle.net/10754/624187en
kaust.authorMoran, Xose Anxelu G.en
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.