1. National Center for Ecological Analysis and Synthesis, University of California–Santa Barbara, 735 State Street, Santa Barbara, CA 93101, USA.
2. Museum für Naturkunde der Humboldt-Universität zu Berlin, Invalidenstrasse 43, D-10115 Berlin, Germany.
3. Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089–0740, USA.
4. Department of the Geophysical Sciences, University of Chicago, Chicago, IL 60637, USA.
5. Geozentrum Nordbayern, Friedrich-Alexander Universität Erlangen, Loewenichstrasse 28, D-91054, Germany.