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Title: Elevated temperature increases carbon and nitrogen fluxes between phytoplankton and heterotrophic bacteria through physical attachment
Authors: Arandia-Gorostidi, Nestor; Weber, Peter K.; Alonso-Saez, Laura; Mayali, Xavier; Moran, Xose Anxelu G.
Citation: ISME JOURNAL, 2017, 11, 641-650
Abstract: Quantifying the contribution of marine microorganisms to carbon and nitrogen cycles and their response to predicted ocean warming is one of the main challenges of microbial oceanography. Here we present a single-cell NanoSIMS isotope analysis to quantify C and N uptake by free-living and attached phytoplankton and heterotrophic bacteria, and their response to short-term experimental warming of 4 degrees C. Elevated temperature increased total C fixation by over 50\%, a small but significant fraction of which was transferred to heterotrophs within 12 h. Cell-to-cell attachment doubled the secondary C uptake by heterotrophic bacteria and increased secondary N incorporation by autotrophs by 68\%. Warming also increased the abundance of phytoplankton with attached heterotrophs by 80\%, and promoted C transfer from phytoplankton to bacteria by 17\% and N transfer from bacteria to phytoplankton by 50\%. Our results indicate that phytoplankton-bacteria attachment provides an ecological advantage for nutrient incorporation, suggesting a mutualistic relationship that appears to be enhanced by temperature increases.
Issue Date: 2017
Type: Article
Language: English
DOI: 10.1038/ismej.2016.156
ISSN: 1751-7362
E-ISSN: 1751-7370
Funder: COMITE project by Spanish National Investigation+Development+Innovation (I+D+I)
Basque Government
`Juan de la Cierva' fellowship from the Spanish Ministry of Science and Education
Marie Curie Reintegration Grant (FP7) [268331]
Gordon and Betty Moore Foundation Marine Microbiology Initiative grant [3302]
Department of Energy's Genome Sciences Program grant [SCW1039]
US Department of Energy at Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
Appears in Publication types:Artículos científicos

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