Figure 1

Location of the study sites within the Mezquital Valley (Mexico). Map was created with ESRI 2011. ArcGIS Desktop: Release 10. Redlands, CA: Environmental Systems Research Institute.
Location of the study sites within the Mezquital Valley (Mexico). Map was created with ESRI 2011. ArcGIS Desktop: Release 10. Redlands, CA: Environmental Systems Research Institute.