1. Dept of Wildlife, Fish and Environmental Studies, Swedish Univ. of Agricultural Sciences Umeå Sweden
2. Utrecht Univ., Copernicus Inst. of Sustainable Development Utrecht the Netherlands
3. Centre for African Conservation Ecology, Nelson Mandela Univ. Port Elizabeth South Africa
4. Centre for Biodiversity Dynamics in a Changing World (BIOCHANGE), Section of Ecoinformatics and Biodiversity, Dept of Biology, Aarhus Univ. Denmark