Dose-effect Relations for Habitat types and Nitrogen deposition

Natura 2000 sites are threatened by excessive nitrogen deposition. Legislation is in place to protect the sites and habitat types, of which the critical load (CL) for nitrogen deposition is key.

However, little or nothing is known what happens beyond the CL. How is species composition changing with increasing nitrogen deposition? We estimated dose-effect relations for habitat types and nitrogen deposition based on the responses of individual species. Question is if these univariate response curves are robust enough or that multivariate responses are needed instead.