Temperature dependences of growth rates and carrying capacities of marine bacteria depart from metabolic theoretical predictions
Type
ArticleKAUST Department
Biological and Environmental Sciences and Engineering (BESE) DivisionMarine Science Program
Red Sea Research Center (RSRC)
Date
2015-09-10Online Publication Date
2015-09-10Print Publication Date
2015-10Permanent link to this record
http://hdl.handle.net/10754/621475
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Show full item recordAbstract
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 EcologyPubMed ID
26362925ae974a485f413a2113503eed53cd6c53
10.1093/femsec/fiv111
Scopus Count
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