For the last 30 years, Dr. Pinay has been working on the scope of ecosystem functioning. He studies the relationships between physical and biogeochemical processes and their contribution to ecosystems’ resistance and resilience to natural and anthropogenic disturbances. He is specialized in river and wetland ecosystems with a watershed perspective. He has led researches in Europe and USA on the consequences of human disturbances in river catchments basins on the functioning of stream and wetlands ecosystems. He is working on the quantification of landscapes features such as soils, riparian and hyporheic zones to regulate diffuse nitrogen fluxes and assessing their contribution at the catchment level. He is also interested in deciphering the consequences of particular and cumulative human activities in drainage basins on the water quality of their outlets.