Periodic Reporting for period 1 - MARIX (Methane and Ammonium Removal In redoX transition zones)
Reporting period: 2020-03-01 to 2021-08-31
The MARIX project will lead to major breakthroughs in the understanding of the key role that microorganisms play in modulating Earth’s biogeochemistry with far-reaching implications for a wide range of research fields.
NIne sea-going sampling campaigns were organized and performed in Marine Lake Grevelingen in 2020 (2x) and 2021 (7x) to study the seasonal cycling of methane and ammonium in a seasonally hypoxic coastal system. A large number of samples were collected and a wide range of geochemical and microbiological analyses were performed. Preliminary results were presented at various conferences. Because of covid, sampling outside the Netherlands was not possible. Hence, the field work planned for the Stockholm Archipelago and Bothnian Sea had to be postponed. Some work was carried out on existing samples from the two aforementioned field areas and one paper was pubished (Dalcin-Martens et al. 2021).