We are interested about the impact of environment changes (warming, deoxygenation and acidification) on marine microbial communities. Among questions, the deoxygenation of coastal systems is of primary importance. Our projects include the study of the biogeographical distribution of Hg-cycling microorganisms in the global ocean (Meta-Hg working group) and the exploration of the microbial ecology of the Baltic Sea, the Black Sea, Cariaco Basin, Norwegian fjords, Swedish fjords, Greenland fjords and Mayotte coral reefs.

We use the DNA present in the water and the sedimentary archives of lake systems to provide new knowledge about the spatial and temporal dynamics of lake microbial communities. Our BLADE project aims to use a drone to collect water samples from many Swedish lakes. Other projects include the study of microbial communities from Abisko lakes, Lake Ekoln, Lake Biwa, Chinese lakes (Sihailongwan Maar Lake, Daihai, Chenghai...), peri-alpine lakes, New Zealand lakes.

Our research extends beyond marine and freshwater systems to explore microbial communities in diverse and extreme environments. These studies help us understand the limits of life and the adaptability of microorganisms to challenging conditions. By investigating these unique ecosystems, we gain insights into fundamental microbial processes that have implications for biogeochemical cycling, climate change, and the search for life in extreme environments on Earth and beyond.