The central research question of this project is whether the resistance of species-rich plant communities to different stress factors will change in a future climate. To this end we will grow grassland ecosystems in sunlit controlled chambers under either the present or future climate conditions, and expose them to a wide range of stressors: drought, nitrogen deficiency, flooding and heavy metals (zinc). Stressors will be applied separately to assess dose-response relations, but also in combination to examine their interactive impact