I am associate professor at the KU Leuven, in Department of Earth and Environmental Sciences, and the head of the Division of Soil and Water Management. In have broad interests in aquatic biogeochemistry and ecology, focusing on tropical freshwater, estuarine, and coastal ecosystems and application of stable isotope techniques: element cycles, greenhouse gas exchange, microbial and higher trophic level foodwebs, terrestrial-aquatic linkages, and reconstruction of recent ecosystem changes.