Biochemistry, Biophysics, and Structural Biology Commons^™

Light And Primary Production Shape Bacterial Activity And Community Composition Of Aerobic Anoxygenic Phototrophic Bacteria In A Microcosm Experiment, Kasia Piwosz, Ana Vrdoljak, Thijs Frenken, Juan Manuel González-Olalla, Danijela Šantić, R. Michael Mckay, Kristian Spilling, Lior Guttman, Petr Znachor, Izabela Mujakić, Lívia Kolesár Fecskeová, Luca Zoccarato, Martina Hanusová, Andrea Pessina, Tom Reich, Hans Peter Grossart, Michal Koblížek

Great Lakes Institute for Environmental Research Publications

Phytoplankton is a key component of aquatic microbial communities, and metabolic coupling between phytoplankton and bacteria determines the fate of dissolved organic carbon (DOC). Yet, the impact of primary production on bacterial activity and community composition remains largely unknown, as, for example, in the case of aerobic anoxygenic phototrophic (AAP) bacteria that utilize both phytoplankton-derived DOC and light as energy sources. Here, we studied how reduction of primary production in a natural freshwater community affects the bacterial community composition and its activity, focusing primarily on AAP bacteria. The bacterial respiration rate was the lowest when photosynthesis was reduced by direct …