Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1038/s42003-021-02365-x
Licence creative commons licence
Title (Primary) High concentrations of dissolved biogenic methane associated with cyanobacterial blooms in East African lake surface water
Author Fazia, S.; Amalfitano, S.; Venturi, S.; Pacini, N.; Vazquez, S.; Olaka, L.A.; Tassi, F.; Crognale, S.; Herzsprung, P.; Lechtenfeld, O.J. ORCID logo ; Cabassi, J.; Capecchiacci, F.; Rossetti, S.; Yakimov, M.M.; Vaselli, O.; Harper, D.M.; Butturini, A.
Source Titel Communications Biology
Year 2021
Department SEEFO; ANA
Volume 4
Page From art. 845
Language englisch
Topic T5 Future Landscapes
T9 Healthy Planet
Supplements https://static-content.springer.com/esm/art%3A10.1038%2Fs42003-021-02365-x/MediaObjects/42003_2021_2365_MOESM1_ESM.pdf
Keywords Carbon cycle; Microbial ecology
UFZ wide themes ProVIS;
Abstract The contribution of oxic methane production to greenhouse gas emissions from lakes is globally relevant, yet uncertainties remain about the levels up to which methanogenesis can counterbalance methanotrophy by leading to CH4 oversaturation in productive surface waters. Here, we explored the biogeochemical and microbial community variation patterns in a meromictic soda lake, in the East Africa Rift Valley (Kenya), showing an extraordinarily high concentration of methane in oxic waters (up to 156 ╬╝mol L-1). Vertical profiles of dissolved gases and their isotopic signature indicated a biogenic origin of CH4. A bloom of Oxyphotobacteria co-occurred with abundant hydrogenotrophic and acetoclastic methanogens, mostly found within suspended aggregates promoting the interactions between Bacteria, Cyanobacteria, and Archaea. Moreover, aggregate sedimentation appeared critical in connecting the lake compartments through biomass and organic matter transfer. Our findings provide insights into understanding how hydrogeochemical features of a meromictic soda lake, the origin of carbon sources, and the microbial community profiles, could promote methane oversaturation and production up to exceptionally high rates.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24686
Fazia, S., Amalfitano, S., Venturi, S., Pacini, N., Vazquez, S., Olaka, L.A., Tassi, F., Crognale, S., Herzsprung, P., Lechtenfeld, O.J., Cabassi, J., Capecchiacci, F., Rossetti, S., Yakimov, M.M., Vaselli, O., Harper, D.M., Butturini, A. (2021):
High concentrations of dissolved biogenic methane associated with cyanobacterial blooms in East African lake surface water
Commun. Biol. 4 , art. 845 10.1038/s42003-021-02365-x