1. Institute of the Environment, University of California, Davis, California, USA;,
2. Botany, School of Natural Sciences, Trinity College, Dublin, Ireland
3. Department of Earth and Planetary Sciences, University of California, Davis, California, USA
4. Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, Colorado, USA
5. Department of Biology, Baylor University, Waco, Texas, USA
6. Department of Environmental Studies, Haverford College, Haverford, Pennsylvania, USA
7. Department of Earth Sciences, University of Oregon, Eugene, Oregon, USA