Ecosystems can act as sources or sinks of several trace gases, such as carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), nitrogen monoxide (NO), nitrous acid (HONO) and biogenic volatile organic compounds (BVOCs). Our mission is to increase knowledge on CO2, CH4, N2O, NO, HONO and BVOCs dynamics in agricultural, forest and permafrost soils and aquatic ecosystems and the biogeochemical and microbial processes behind the fluxes. We focus on studying effects of climate change and land use change on the biogeochemical cycles and on dynamics of gases important in the atmosphere. The conducted research spans various scales from molecules to ecosystems to landscape. Our research is multidisciplinary and combines expertise of researches having different scientific backgrounds, e.g., microbiology, soil science, environmental sciences, molecular biology, limnology and atmospheric physics.