1. Environmental Change Institute; School of Geography and the Environment; University of Oxford; Oxford OX1 3QY UK
2. Department of Biology; Norwegian University of Science and Technology; Trondheim N-7491 Norway
3. Mathematical Institute; University of Oxford; Oxford OX2 6GG UK
4. School of Natural Sciences; University of California - Merced; Merced CA 95343 USA
5. Department of Ecology and Evolutionary Biology; University of Arizona; Tucson Arizona 85721 USA
6. School of Geography and the Environment; University of Oxford; Oxford OX1 3QY UK
7. School of Biology and Ecology; University of Maine; Orono ME 04469 USA
8. Department of Geography and Environment; University of Southampton; Southampton SO17 1BJ UK
9. Section for Biodiversity & Ecoinformatics; Department of Bioscience; Aarhus University; Aarhus C DK-8000 Denmark