1. Department of Forest Ecology and Management; Swedish University of Agricultural Sciences; Skogsmarksgränd Umeå SE-901 83 Sweden
2. Department of Global Ecology; Carnegie Institution for Science; 260 Panama Street Stanford CA 94305 USA
3. Universidad Nacional de San Antonio Abad del Cusco; 733 Avenida de la Cultura Cusco 921 Peru
4. Natural Resources Institute; University of Greenwich; Central Avenue Chatham Maritime ME4 4 TB UK
5. Environmental Change Institute; Oxford University Centre for the Environment; University of Oxford; South Parks Road Oxford OX1 3QY UK