(Biography) Maurice Levasseur obtained a MSc in Marine Biology at Laval University (1983) and a PhD in Oceanography at the University of British Columbia (1990). He then worked as a researcher and head of the Primary Production Section at the Maurice Lamontagne Institute (1990-2002). Since 2002, he is professor in the Department of Biology at Laval University where he holds the Canadian Research Chair on Plankton-Climate Interactions. He is also director of the network Quebec-Ocean, and Canadian delegate for the IGBP SOLAS (Surface Ocean ? Lower Atmosphere Study) program. Levasseur specializes in the biological production of the climatically-active gases dimethylsulfide and nitrous oxide, and in the ecophysiology of harmful algal blooms.