1. Institute of Crop Science and Resource Conservation, Soil Science and Soil Ecology; University of Bonn; Nussallee 13 Bonn 53115 Germany
2. Agrosphere Institute (IBG-3); Jülich Research Centre; Jülich 52425 Germany
3. Center for International Forestry Research; Jalan CIFOR, Situ Gede, Sindang Barang Bogor 16115 Indonesia
4. Institute of Crop Science and Resource Conservation, Plant Nutrition - Vegetation Ecology; University of Bonn; Karlrobert-Kreiten-Strasse 13 Bonn 53115 Germany
5. Evolution and Ecology Research Centre; School of Biological, Earth and Environmental Sciences; UNSW Australia; Sydney NSW 2052 Australia
6. Facultad de Ciencias Ambientales; Universidad Científica del Sur; Lima 33 Peru
7. Department of Chemistry - Biology; Division of Biology; Faculty of Science and Technology; Institute of Biology; University of Siegen; Adolf-Reichwein-Str. 2 Siegen 57068 Germany