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

Tamara Megan Huete-Stauffer, Nestor Arandia-Gorostidi, Laura Díaz-Pérez, Xose Anxelu G. Moran

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


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.
Original languageEnglish (US)
Pages (from-to)fiv111
JournalFEMS Microbiology Ecology
Issue number10
StatePublished - Sep 10 2015

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: 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.


Dive into the research topics of 'Temperature dependences of growth rates and carrying capacities of marine bacteria depart from metabolic theoretical predictions'. Together they form a unique fingerprint.

Cite this