[1
]Institute of Geography and Geoecology; Karlsruhe Institute of Technology; Karlsruhe
76131 Germany
[2
]Chair of Landslide Research; Technische Universität München; München 80333 Germany
[3
]Institute of Crop Science and Resource Conservation, Soil Science and Soil Ecology;
University of Bonn; Bonn 53115 Germany
[4
]Department of Forest Sciences; University of Helsinki; Helsinki 00100 Finland