By - Amelia Rotaru
Paola’s second preprint
- Paola’s second preprint is about an urban lake methanogenic community corroding iron.
- We observed that dead Clostridium stimulate the growth of methanogens, however not as previously assumed via acetate-transfer. CO2-reductive methanogens were stimulated by the Clostridium [FeFe]-hydrogenases (abundant in their genomes) released after the collapse of the acetogens. Clostridia genome-screening indicated they are the N2-fixers (a process that is very energy intensive), thus their collapse releases readily fixed N2 for the methanogens to use, reducing the energy expenses for the later.