"Mexican Plateau" . "Biodiversity" . "Ecology" . "Biogeography" . "Symbiosis" . "Natural history of the Mexican Plateau" . "Ecoregions of Mexico" . "Conservation biology" . "Superorganisms" . "Systems ecology" . "Biological systems" . "Species" . "Flora of Central Mexico" . "Population genetics" . "Deserts of Mexico" . "Deserts and xeric shrublands" . "Nearctic ecoregions" . "Ecosystems" .