Jakob Zopfi

This study measures nitrogen and oxygen isotope effects during nitrate reduction in vitro and in natural lake water consortia, finding variations in isotope ratios linked to enzyme types and environmental factors.

The paper identifies non-canonical nitrous oxide production pathways in a lake through isotope analysis and incubation experiments, showing bacterial denitrification as dominant with contributions from chemo- and fungal denitrification.

This study investigates the metabolic flexibility of Ca. Methanoperedens and its interactions with sulfate-reducing bacteria in Lake Cadagno sediments using metagenomics and incubations.

The paper investigates nitrogen transformation pathways in a meromictic lake's redox transition zone, finding that nitrogen recycling via DNRA and nitrification dominates over denitrification under carbon limitation.