1. Restor Fraumünsterstrasse 16 8001 Zurich Switzerland
2. Department of Environmental Systems Science ETH Zürich 8001 Zurich Switzerland
3. Asociación Ambiental Finca Cantaros, San Vito de Coto Brus Puntarenas Costa Rica
4. Environmental Studies Department University of California Santa Cruz CA 95064 U.S.A.
5. Charles Darwin Research Station, Charles Darwin Foundation Puerto Ayora Galápagos Ecuador
6. School of Life Sciences University of Hawai'i at Mānoa Honolulu HI 96822 U.S.A.