Understanding the relation between species richness , functional diversity and productivity is critical for the prediction of ecosystem services on different spatial scales. Biodiversity experiments with artificial species assemblages hav e shown that community-scale species richness may affect ecosystem productivity and spat ial stability. However, those artificial conditions for biodiversity experiments may bias th e relevance for natural communities. Here we like to investigate i) the relation between spec ies richness, functional diversity and productivity at different scales (plant-neighbourho od scale, m2 and field scale) and ii) show the use of those relations in model and up scaling appr oaches.