Acknowledgements
We thank the researchers whose published data we used in this paper.
Thanks to Robert Ricklefs, Christine Edwards, and Carmen Ulloa for
advice in this study. Isabel Loza, Justin Baldwin and Sebastián Tello
provided valuable help with statistical analyses. Many thanks to Justin
Zweck, Justin Baldwin, Krissa Skogen, and to members of the Muchhala lab
at the University of Missouri at Saint Louis for constructive
discussions on a previous version of this manuscript. This research was
supported by the Whitney Harris World Ecology Center at the University
of Missouri at Saint Louis.