Marit Reigstad is the principal investigator of the Nansen Legacy. Reigstad is a marine ecologist and has been working with Arctic marine ecosystems and couplings to the environment since 2001. The research expertise of Reigstad is built around pelagic-benthic coupling and vertical flux regulation by lower trophic levels and/ or physical forcing. Her research includes the use of fieldwork, experimental approaches and long-time cooperation with modellers to study ecosystem function and energy transfer, role of zooplankton, phytoplankton and biogeochemistry, primary-, new- and export production. Key regions of research have been the Barents Sea, the Arctic Ocean and the Fram Strait.