AUTHOR=Cerbin Slawek , Pérez Germán , Rybak Michał , Wejnerowski Łukasz , Konowalczyk Adam , Helmsing Nico , Naus-Wiezer Suzanne , Meima-Franke Marion , Pytlak Łukasz , Raaijmakers Ciska , Nowak Witold , Bodelier Paul L. E. TITLE=Methane-Derived Carbon as a Driver for Cyanobacterial Growth JOURNAL=Frontiers in Microbiology VOLUME=13 YEAR=2022 URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2022.837198 DOI=10.3389/fmicb.2022.837198 ISSN=1664-302X ABSTRACT=
Methane, a potent greenhouse gas produced in freshwater ecosystems, can be used by methane-oxidizing bacteria (MOB) and can therefore subsidize the pelagic food web with energy and carbon. Consortia of MOB and photoautotrophs have been described in aquatic ecosystems and MOB can benefit from photoautotrophs which produce oxygen, thereby enhancing CH4 oxidation. Methane oxidation can account for accumulation of inorganic carbon (i.e., CO2) and the release of exometabolites that may both be important factors influencing the structure of phytoplankton communities. The consortium of MOB and phototroph has been mainly studied for methane-removing biotechnologies, but there is still little information on the role of these interactions in freshwater ecosystems especially in the context of cyanobacterial growth and bloom development. We hypothesized that MOB could be an alternative C source to support cyanobacterial growth in freshwater systems. We detected low δ13C values in cyanobacterial blooms (the lowest detected value −59.97‰ for