Interested in the exploration of microbial diversity in aquatic environments from temperate to polar zones and the description of the role of microorganisms in biogeochemical cycles including contaminants (i.e., nitrogen, carbon, mercury). My main research lies in the microbial transformations of mercury in a large diversity of ecosystems including recently the submarine groundwater discharges (SGDs). Coastal aquifers receive anthropogenic pollution and may be a source of methylmercury for coastal ecosystems. Hence, I recently focused my research on exploring the role of nutrient-enriched SGDs in microbial Hg cycling of coastal areas by combining microbial, chemical, and educative dimensions.