1Department of Anthropology, University of Auckland, Auckland, New Zealand
2Department of Anthropology, University of Otago, Dunedin, New Zealand
3Department of Global Ecology, Carnegie Institution, 260 Panama Street, Stanford, CA 94305 USA
4Department of Anthropology, University of California, Berkeley, CA 94720, USA
5Department of Integrative Biology, University of California, Berkeley, CA 94720 USA
6Department of Anthropology, University of California, Davis, CA 95616, USA
7Department of Geography, University of California, Santa Barbara, CA, 93106, USA
8Department of Biological Sciences, Stanford University, Stanford, CA 94305 USA