Affiliation: | a Department of Plant Ecology, University Giessen, Heinrich-Buff-Ring 26-32, Giessen 35392, Germany b Max-Planck Institute for Biogeochemistry, Hans-Knöll-Str. 10, 07745 Jena, Germany c Agriculture, Food and Environmental Science Division, Agri-Food and Biosciences Institute, Newforge Lane, Belfast BT9 5PX, Northern Ireland |