作者单位:CABI, CH-2800 Delémont, Switzerland[1]Swiss Federal Institute for Forest, Snow and Landscape Research WSL, CH-8903 Birmensdorf, Switzerland[2]Institute of Plant Sciences, University of Bern, CH-3013 Bern, Switzerland[3]Institute of Agricultural Sciences, ETH Zürich, CH-8092 Zürich, Switzerland[4]