Funding for this research was provided by:
National Science Foundation (Austral Center for Scientific Research)
National Institute of Food and Agriculture (1007271)
First Online: 4 July 2017
Compliance with Ethical Standards
: This work was supported by the U.S. National Science Foundation, Dynamics of Coupled Natural and Human Systems (CNH) program (GEO-1211877), and in part by the Virginia Agricultural Experiment Station and the USDA National Institute of Food and Agriculture McIntire-Stennis Program project 1007271.
: The authors declare no conflict of interest.