This includes a broad range of biogeochemical processes in temperate and tropical ecosystems. Particularly, we investigate the influence of biodiversity, climate, and atmospheric deposition (natural or anthropogenic) on nutrient cycling (e.g. C, N, Ca, K, Mg) and pollutants in soils and ecosystems. To realize our goals, we combine element flux measurements with stable isotope ratio analyses (e.g. δ¹⁸O, δ¹³C, δ¹⁵N, δ⁴⁴Ca, δ²⁶Mg, δ⁶⁶Zn) and various methods of data analysis (e.g. statistical or process-oriented modeling).