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    Temperature dependences of growth rates and carrying capacities of marine bacteria depart from metabolic theoretical predictions

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    Type
    Article
    Authors
    Huete-Stauffer, Tamara Megan
    Arandia-Gorostidi, Nestor
    Díaz-Pérez, Laura
    Moran, Xose Anxelu G. cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Marine Science Program
    Red Sea Research Center (RSRC)
    Date
    2015-09-10
    Online Publication Date
    2015-09-10
    Print Publication Date
    2015-10
    Permanent link to this record
    http://hdl.handle.net/10754/621475
    
    Metadata
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    Abstract
    Using the metabolic theory of ecology (MTE) framework, we evaluated over a whole annual cycle the monthly responses to temperature of the growth rates (μ) and carrying capacities (K) of heterotrophic bacterioplankton at a temperate coastal site. We used experimental incubations spanning 6oC with bacterial physiological groups identified by flow cytometry according to membrane integrity (live), nucleic acid content (HNA and LNA) and respiratory activity (CTC+). The temperature dependence of μat the exponential phase of growth was summarized by the activation energy (E), which was variable (-0.52 to 0.72 eV) but followed a seasonal pattern, only reaching the hypothesized value for aerobic heterotrophs of 0.65 eV during the spring bloom for the most active bacterial groups (live, HNA, CTC+). K (i.e. maximum experimental abundance) peaked at 4 × 106 cells mL-1 and generally covaried with μbut, contrary to MTE predictions, it did not decrease consistently with temperature. In the case of live cells, the responses of μand K to temperature were positively correlated and related to seasonal changes in substrate availability, indicating that the responses of bacteria to warming are far from homogeneous and poorly explained by MTE at our site. © FEMS 2015.
    Citation
    Huete-Stauffer TM, Arandia-Gorostidi N, Díaz-Pérez L, Morán XAG (2015) Temperature dependences of growth rates and carrying capacities of marine bacteria depart from metabolic theoretical predictions. FEMS Microbiology Ecology 91: fiv111. Available: http://dx.doi.org/10.1093/femsec/fiv111.
    Sponsors
    This work was supported by the Spanish Ministry of Economy and Competitiveness (MINECO) through funding of the COMITE (Coastal Ocean MIcrobial plankton and Temperature) project [CTM-2010-15840] and the associated PhD scholarship [BES-2011-048573] to TM Huete-Stauffer.
    Publisher
    Oxford University Press (OUP)
    Journal
    FEMS Microbiology Ecology
    DOI
    10.1093/femsec/fiv111
    PubMed ID
    26362925
    ae974a485f413a2113503eed53cd6c53
    10.1093/femsec/fiv111
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Red Sea Research Center (RSRC); Marine Science Program

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