Phenomer 2.0 : Citizen Science and Satellite Imagery for a better knowledge of HAB

The goal of Phenomer 2.0 is to better observe and understand the phenomena of colored waters linked to microalgal blooms. The stakes are high, as toxic and harmful algal blooms (HABs) pose health risks and can impact ecosystems and their uses (aquaculture, fishing, swimming, etc.). Building on the success of the Phenomer initiative launched in Brittany in 2014, Phenomer 2.0 will expand nationally and combine participatory observation, satellite imagery, and the physico-chemical and biological characterization of blooms (environmental DNA, flow cytometry, pigment content, abiotic parameters, etc.). The project also includes a communication and knowledge dissemination component aimed at marine professionals and citizens. Phenomer 2.0 effectively complements the spatial and temporal coverage of current monitoring networks, which are based on stationary observations at fixed locations with a predetermined frequency. Ultimately, this approach could pave the way for a more resource-efficient and decarbonized HAB monitoring system.