The role of biological clocks in seasonal synchrony in the Arctic


Johann Lavaud, Marc Hébert, David Hazlerigg

Project type



Canada First-Sentinelle Nord et UiT-Arctic University of Norway

Project duration

Start Date

February 1, 2017

End Date

February 28, 2023


Page du Projet sur le site de Univ. Laval (Quebec)

Rôle des diatomées dans le projet



The aim of this project is to use Arctic diatoms to study the effect of photoperiod and light spectrum on the rhythmicity of physiology and metabolism in order to propose new blue:red light regimens with positive effect on the biological clock, for potential applications for non-invasive medical light treatments (‘light therapy’). In parallel, the project will 1) deepen our knowledge of the fundamental regulatory processes behind the light-driven ecophysiology of diatoms, the sentinels of climate changes in the Arctic, 2) open on bioprospection of added-value molecules beneficial to human health, i.e. carotenoid pigments and polyunsaturated lipids found in Arctic diatoms.

The team

Laboratory Members


  • Marc Hébert, groupe d’électrophysiologie visuelle et de photobiologie, Centre de recherche CERVO, Université Laval, Québec, Canada
  • David Hazlerigg, group of Arctic chronobiology and physiology, UiT-Arctic University of Norway, Tromsø, Norvège
  • Marcel Babin, UMI Takuvik, CNRS/Université Laval, Québec, Canada
  • Angela Falciatore, Institut de Biologie Physico-Chimique, CNRS/Sorbonne Université, France