Tribute to Jean Pelletier

Tribute to Jean Pelletier, deceased January 14, 2025

It is with deep gratitude that we pay tribute to Jean Pelletier, an eminent member of CIPEL's Scientific Council and a leading figure in limnology. His commitment and innovative spirit have left a lasting mark on the study and preservation of lake ecosystems.

A pioneer in the study of phytoplankton and primary production in lakes, he designed several tools still in use today. Among them, the Pelletier bell, patented in 1978, remains a benchmark for sampling the waters of Lake Geneva, Annecy and Le Bourget. He also developed innovative analysis methods, such as sawtooth prospecting and a rotating incubator for testing the impact of phosphorus on eutrophication.

His methodological work structured the monitoring of the trophic evolution of Lake Geneva, laying the foundations of a database spanning more than 40 years, essential for current and future research. His role on the CIPEL Scientific Council has been decisive in guiding strategic studies and strengthening cooperation between researchers.

Jean Pelletier was above all a passionate man, aware of the privilege of having devoted his life to the science of Lake Geneva. He leaves us with these words, imbued with deep humility:
"When I sail around Lake Geneva, still full of mystery, on my little sailboat, I realize that I have been lucky enough, along with my colleagues, to have discovered some of its innermost secrets. But I feel that this knowledge, however modest, is an insider's privilege compared to other sailors. It's up to us, no doubt, to enlighten them.

His scientific and human legacy will remain a precious inspiration for all those working to preserve Alpine lakes.

Our thoughts are with his family, his loved ones and all the scientific colleagues who had the good fortune to work alongside him.

CIPEL members

Image courtesy of Jacquet, S. 2014. La limnologie et l'histoire de la station d'hydrobiologie lacustre de Thonon-les-Bains (Haute-Savoie): des hommes dans l'histoire.