Institution: | Swiss Federal Institute for Forest, Snow and Landscape Research, Zurcherstr. 111, CH-8903 Birmensdorf, Switzerland;;Institute of Environmental Sciences, Zurich University, Winterthurerstr. 190, CH-8057 Zurich, Switzerland;and;Nature Conservation and Plant Ecology Group, Wageningen University, Bornsesteeg 69, 6708 PD Wageningen, the Netherlands |