1. Computational and Molecular Population Genetics; Institute of Ecology and Evolution; University of Bern; Baltzerstrasse 6 CH-3012 Bern Switzerland
2. Community Ecology Group; Institute of Ecology and Evolution; University of Bern; Baltzerstrasse 6 CH-3012 Bern Switzerland
3. Swiss Institute of Bioinformatics; Genopode; CH-1015 Lausanne Switzerland