Joensuu Research Unit, Finnish Forest Research Institute, P.O. Box 68, Joensuu, 80101 Finland
Institute of Ecology, Tallinn University, Uus-Sadama 5, Tallinn, 10120 Estonia
Institute of Ecology, Tallinn University, Uus-Sadama 5, Tallinn, 10120 Estonia ; Department of Biology, University of Joensuu, P.O. Box 111, Joensuu, 80101 Finland
Institute of Ecology, Tallinn University, Uus-Sadama 5, Tallinn, 10120 Estonia ; Department of Forest Soils, the Swedish University of Agricultural Sciences, P.O. Box 7001, Uppsala, 75007 Sweden
School of Geography, University of Plymouth, Devon, Plymouth, PL4 8AA United Kingdom
School of Geography, University of Plymouth, Devon, Plymouth, PL4 8AA United Kingdom
Department of Geology, University of Helsinki, P.O. Box 64, Helsinki, 00014 Finland
Parkano Research Unit, Finnish Forest Research Institute, Kaironiementie 54, Parkano, 39700 Finland
Department of Forest Ecology, University of Helsinki, P.O. Box 24, Helsinki, 00014 Finland
Department of Geology, University of Helsinki, P.O. Box 64, Helsinki, 00014 Finland
Department of Ecology and Systematics, Division of Hydrobiology, P.O. Box 17, Helsinki, 00014 Finland
Institute of Ecology, Tallinn University, Uus-Sadama 5, Tallinn, 10120 Estonia ; University of Tartu, Ülikooli 18, Tartu, 50090 Estonia