Terrestrial ecoregions of Mexico   The following is a list of ecoregions  in Mexico   as identified by the World Wide Fund for Nature  (WWF). A different system of ecoregional analysis is used by the Commission for Environmental Cooperation , a trilateral body linking Mexican, Canadian and United States environmental regime. 
   
Terrestrial ecoregions  The terrestrial ecoregions  of Mexico span two biogeographic realms  - the Nearctic  and Neotropic  - which together constitute the entire biogeography  of the Americas . 
Veracruz  is the most biodiverse  state with 10 ecoregions across 5 biomes  and 2 realms . Chiapas  comes in a close second with 10 ecoregions across 4 biomes in the same realm. By contrast, Morelos  is the least biodiverse state with just 2 ecoregions.[ 1]   
    Realm     Biome     Ecoregion     State     Nearctic    Deserts and xeric shrublands    Baja California desert    Baja California , Baja California Sur     Nearctic    Deserts and xeric shrublands    Central Mexican matorral    Aguascalientes , Guanajuato , Hidalgo , Jalisco , Mexico , Mexico City , Michoacán , Querétaro , Zacatecas     Nearctic    Deserts and xeric shrublands    Chihuahuan Desert    Chihuahua , Coahuila , Durango , Nuevo León , Sonora , Zacatecas     Nearctic    Deserts and xeric shrublands    Gulf of California xeric scrub    Baja California , Baja California Sur     Nearctic    Deserts and xeric shrublands    Meseta Central matorral    Coahuila , Durango , Hidalgo , Nuevo León , Querétaro , San Luis Potosí , Tamaulipas , Zacatecas     Nearctic    Deserts and xeric shrublands    Sonoran Desert    Baja California , Sinaloa , Sonora     Nearctic    Deserts and xeric shrublands    Tamaulipan matorral    Nuevo León , Tamaulipas     Nearctic    Deserts and xeric shrublands    Tamaulipan mezquital    Coahuila , Nuevo León , Tamaulipas     Nearctic    Mangroves    Northern Mesoamerican Pacific Coast Mangroves    Baja California Sur , Sinaloa , Sonora     Nearctic    Mediterranean forests, woodlands, and scrub    California coastal sage and chaparral    Baja California     Nearctic    Temperate coniferous forests    Sierra Juárez and San Pedro Mártir pine–oak forests    Baja California     Nearctic    Temperate broadleaf and mixed forests    Sierra Madre Occidental pine–oak forests    Chihuahua , Durango , Jalisco , Sonora , Zacatecas     Nearctic    Temperate broadleaf and mixed forests    Sierra Madre Oriental pine–oak forests    Chihuahua , Coahuila , Durango , Hidalgo , Nuevo León , Puebla , Querétaro , San Luis Potosí , Tamaulipas , Veracruz , Zacatecas     Nearctic    Tropical and subtropical dry broadleaf forests    Sonoran–Sinaloan transition subtropical dry forest    Sinaloa , Sonora     Nearctic    Tropical and subtropical grasslands, savannas, and shrublands    Tamaulipan pastizal    Tamaulipas     Neotropical    Deserts and xeric shrublands    San Lucan xeric scrub    Baja California Sur     Neotropical    Deserts and xeric shrublands    Tehuacán Valley matorral    Oaxaca , Puebla , Tlaxcala     Neotropical    Flooded grasslands and savannas    Central Mexican wetlands    Mexico , Michoacán , Guanajuato , Mexico City     Neotropical    Mangroves    Alvarado mangroves    Tamaulipas , Veracruz     Neotropical    Mangroves    Belizean Coast mangroves    Quintana Roo     Neotropical    Mangroves    Marismas Nacionales–San Blas mangroves    Nayarit , Sinaloa     Neotropical    Mangroves    Mayan Corridor mangroves    Quintana Roo     Neotropical    Mangroves    Mexican South Pacific Coast mangroves    Guerrero , Michoacán , Oaxaca     Neotropical    Mangroves    Petenes mangroves    Campeche , Yucatán     Neotropical    Mangroves    Ría Lagartos mangroves    Yucatán     Neotropical    Mangroves    Tehuantepec–El Manchón mangroves    Chiapas     Neotropical    Mangroves    Usumacinta mangroves    Tabasco     Neotropical    Montane grasslands and shrublands    Zacatonal    Hidalgo , Mexico , Morelos     Neotropical    Tropical and subtropical coniferous forests    Central American pine–oak forests    Chiapas     Neotropical    Tropical and subtropical coniferous forests    Sierra de la Laguna pine–oak forests    Baja California Sur     Neotropical    Tropical and subtropical coniferous forests    Sierra Madre de Oaxaca pine–oak forests    Oaxaca , Puebla , Veracruz     Neotropical    Tropical and subtropical coniferous forests    Sierra Madre del Sur pine–oak forests    Guerrero , Jalisco , Michoacán , Oaxaca , Puebla     Neotropical    Tropical and subtropical coniferous forests    Trans-Mexican Volcanic Belt pine–oak forests    Aguascalientes , Colima , Guanajuato , Guerrero , Hidalgo , Jalisco , Mexico , Mexico City , Michoacán , Morelos , Nayarit , Puebla , Querétaro , San Luis Potosí , Tlaxcala , Veracruz , Zacatecas     Neotropical    Tropical and subtropical dry broadleaf forests    Bajío dry forests    Guanajuato , Jalisco , Michoacán     Neotropical    Tropical and subtropical dry broadleaf forests    Balsas dry forests    Guerrero , Mexico , Michoacán , Morelos , Oaxaca  and Puebla     Neotropical    Tropical and subtropical dry broadleaf forests    Central American dry forests    Chiapas     Neotropical    Tropical and subtropical dry broadleaf forests    Chiapas Depression dry forests    Chiapas     Neotropical    Tropical and subtropical dry broadleaf forests    Jalisco dry forests    Colima , Jalisco , Michoacán , Nayarit     Neotropical    Tropical and subtropical dry broadleaf forests    Revillagigedo Islands dry forests    Colima     Neotropical    Tropical and subtropical dry broadleaf forests    Sierra de la Laguna dry forests    Baja California Sur     Neotropical    Tropical and subtropical dry broadleaf forests    Sinaloan dry forests    Chihuahua , Jalisco , Nayarit , Sinaloa , Sonora     Neotropical    Tropical and subtropical dry broadleaf forests    Southern Pacific dry forests    Chiapas , Guerrero , Oaxaca     Neotropical    Tropical and subtropical dry broadleaf forests    Veracruz dry forests    Veracruz     Neotropical    Tropical and subtropical dry broadleaf forests    Yucatán dry forests    Campeche , Quintana Roo , Yucatán     Neotropical    Tropical and subtropical moist broadleaf forests    Chiapas montane forests    Chiapas     Neotropical    Tropical and subtropical moist broadleaf forests    Chimalapas montane forests    Chiapas , Oaxaca     Neotropical    Tropical and subtropical moist broadleaf forests    Oaxacan montane forests    Oaxaca , Puebla , Veracruz     Neotropical    Tropical and subtropical moist broadleaf forests    Pantanos de Centla    Campeche , Chiapas , Tabasco     Neotropical    Tropical and subtropical moist broadleaf forests    Petén–Veracruz moist forests    Campeche , Chiapas , Oaxaca , Puebla , Quintana Roo , Tabasco , Veracruz     Neotropical    Tropical and subtropical moist broadleaf forests    Sierra de los Tuxtlas    Veracruz     Neotropical    Tropical and subtropical moist broadleaf forests    Sierra Madre de Chiapas moist forests    Chiapas     Neotropical    Tropical and subtropical moist broadleaf forests    Veracruz moist forests    Hidalgo , Puebla , San Luis Potosí , Tamaulipas , Veracruz     Neotropical    Tropical and subtropical moist broadleaf forests    Veracruz montane forests    Hidalgo , Puebla , Veracruz     Neotropical    Tropical and subtropical moist broadleaf forests    Yucatán moist forests    Campeche , Quintana Roo , Yucatán   
 
Freshwater ecoregions  
Baja California Complex     
Sinaloan Coastal Complex   
Rio Bravo Complex   
 Lerma/Santiago Complex   
Rio Panuco Complex   
Balsas Complex   
Pacific Central Complex   
Atlantic Central Complex    
Warm Temperate Northeast Pacific     
Warm Temperate Northwest Atlantic  Northern Gulf of Mexico[ 2]    
Tropical Northwestern Atlantic  Southern Gulf of Mexico[ 2]   Western Caribbean[ 2]    
See also   
References   Olson, D., Dinerstein, E., Canevari, P., Davidson, I., Castro, G., Morisset, V., Abell, R., and Toledo, E.; eds. (1998). Freshwater biodiversity of Latin America and the Caribbean: A conservation assessment.  Biodiversity Support Program, Washington DC.  Ricketts, Taylor H; Eric Dinerstein; David M. Olson; Colby J. Loucks; et al. (1999). Terrestrial Ecoregions of North America: a Conservation Assessment. Island Press; Washington, DC.