1. Equilibrium Research; 47 The Quays, Cumberland Road Bristol BS1 6UQ U.K.
2. School of Earth and Environmental Sciences; University of Queensland; Brisbane Queensland 4072 Australia
3. Department of Geography and Open Space Research Centre; The Open University; Milton Keynes MK7 6AA U.K.
4. School of Water, Energy and the Environment; Cranfield University; College Road Cranfield MK43 0AL U.K.
5. International Union for Conservation of Nature; Rue Mauverney 28 Gland 1196 Switzerland
6. ESiLi; Het Haam 16 Arnhem KW 6846 The Netherlands
7. Chicago Botanic Garden; 1000 Lake Cook Road Glencoe IL 60022 U.S.A
8. 5 Marshall Road Cambridge CB1 7TY U.K.
9. Department of Anthropology; University College London; Taviton Street London WC1H 0BW U.K.