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Professional Paper 1650-E

Atlas of Relations Between Climatic Parameters and Distributions of Important Trees and Shrubs in North America— Ecoregions of North America

World Wildlife Fund Ecoregions
(Click on an ecoregion name to view the graphical display for that ecoregion.)
Level I Major Habitat Type Ecoregion
TROPICAL BROADLEAF FORESTS Moist Forest Central American Atlantic Moist Forest

Central American Montane Forest

Chiapas Montane Forest

Chimalapas Montane Forest

Costa Rican Seasonal Moist Forest

Eastern Panamanian Montane Forest

Isthmian-Atlantic Moist Forest

Isthmian-Pacific Moist Forest

Oaxacan Montane Forest

Pantanos de Centla

Peten-Veracruz Moist Forest

Sierra de los Tuxtlas

Sierra Madre de Chiapas Moist Forest

South Florida Rocklands

Talamancan Montane Forest

Veracruz Moist Forest

Veracruz Montane Forest

Yucatan Moist Forest

Dry Forest Sonoran/Sinaloan Transition Dry Forests

Bajio Dry Forest

Balsas Dry Forest

Central American Dry Forest

Chiapas Depression Dry Forest

Jalisco Dry Forest

Panamanian Dry Forest

Sierra de la Laguna Dry Forest

Sinaloan Dry Forest

Southern Pacific Dry Forest

Veracruz Dry Forest

Yucatan Dry Forest
TEMPERATE CONIFER, BROADLEAF AND MIXED FORESTS Broadleaf and Mixed Forests Sierra Madre Occidental Pine-Oak Forests

Sierra Madre Oriental Oak-Pine Forests

Sierra Juarez & San Pedro Martir Pine-Oak Forest

Belizian Pine Forest

Central American Pine-Oak Forest

Miskito Pine Forest

Sierra de la Laguna Pine-Oak Forest

Sierra Madre de Oaxaca Pine-Oak Forest

Sierra Madre del Sur Pine-Oak Forest

Trans-Mexican Volcanic Belt Pine-Oak Forest

Willamette Valley Forest

Western Great Lakes Forest

Eastern Forest/Boreal Transition

Upper Midwest Forest/Savanna Transition Zone

Southern Great Lakes Forest

Eastern Great Lakes Lowland Forest

New England/Acadian Forest

Gulf of St. Lawrence Lowland Forest

Northeastern Coastal Forest

Allegheny Highlands Forest

Appalachian/Blue Ridge Forest

Appalachian Mixed Mesophytic Forest

Central U.S. Hardwood Forest

Ozark Mountain Forest

Mississippi Lowland Forest

East Central Texas Forest

Southeastern Mixed Forest

Coniferous Forests Northern Pacific Coastal Forest

Queen Charlotte Islands

Central British Columbia Mountain Forest

Alberta Mountain Forest

Fraser Plateau and Basin Complex

Alberta/British Columbia Foothills Forest

Northern Transitional Alpine Forest

North Central Rockies Forest

Okanogan Dry Forest

Cascade Mountains Leeward Forest

British Columbia Mainland Coastal Forest

Central Pacific Coastal Forest

Puget Lowland Forest

Central and Southern Cascades Forest

Eastern Cascades Forest

Blue Mountains Forest

Klamath-Siskiyou Forest

Northern California Coastal Forest

Sierra Nevada Forest

Great Basin Montane Forest

South Central Rockies Forest

Wasatch and Uinta Montane Forest

Colorado Rockies Forest

Arizona Mountains Forest

Piney Woods Forest

Atlantic Coastal Pine Barrens

Middle Atlantic Coastal Forest

Southeastern Conifer Forest

Florida Sand Pine Scrub
GRASSLANDS, SAVANNAS, SHRUBLANDS Grasslands/Savanna/Shrub Palouse Grassland

California Central Valley Grassland

Canadian Aspen Forest and Parkland

Northern Mixed Grassland

Montana Valley and Foothill Grassland

Northwestern Mixed Grassland

Northern Tall Grassland

Central Tall Grassland

Flint Hills Tall Grassland

Nebraska Sand Hills Mixed Grassland

Western Short Grassland

Central and Southern Mixed Grassland

Central Forest/Grassland Transition Zone

Edwards Plateau Savanna

Texas Blackland Prairies

Western Gulf Coastal Grassland

Flooded Grasslands Everglades

Montane Grasslands Zacatonal
MEDITERRANEAN AND XERIC FORMATIONS Mediterranean Scrub and Savanna California Coastal Sage and Chaparral

California Interior Chaparral and Woodland

California Montane Chaparral and Woodland

Xeric Shrublands/Scrublands/Deserts San Lucan Xeric Scrub

Baja California Desert

Gulf of California Xeric Scrub

Sonoran Desert

Chihuahuan Desert

Meseta Central Matorral

Tamaulipan Matorral

Tamaulipan Mezquital

Central Mexican Matorral

Tehuacan Valley Matorral

Snake/Columbia Shrub Steppe

Great Basin Shrub Steppe

Wyoming Basin Shrub Steppe

Colorado Plateau Shrubland

Mojave Desert

Motagua Valley Thornscrub
MANGROVES Mangroves Mangroves
BOREAL FOREST, TAIGA AND TUNDRA Boreal Forest/Taiga Interior Alaska/Yukon Lowland Taiga

Alaska Peninsula Montane Taiga

Cook Inlet Taiga

Copper Plateau Taiga

Northwest Territories Taiga

Yukon Interior Dry Forest

Northern Cordillera Forest

Muskwa/Slave Lake Forest

Northern Canadian Shield Taiga

Mid-Continental Canadian Forest

Midwestern Canadian Shield Forest

Central Canadian Shield Forest

Southern Hudson Bay Taiga

Eastern Canadian Shield Taiga

Eastern Canadian Forest

Newfoundland Highland Forest

South Avalon-Burin Oceanic Barrens

Tundra Beringia Lowland Tundra

Beringia Upland Tundra

Alaska/St. Elias Range Tundra

Pacific Coastal Mountain Tundra and Ice Fields

Interior Yukon/Alaska Alpine Tundra

Ogilvie/MacKenzie Alpine Tundra

Brooks/British Range Tundra

Arctic Foothills Tundra

Arctic Coastal Tundra

Low Arctic Tundra

Middle Arctic Tundra

High Arctic Tundra

Davis Highlands Tundra

Baffin Coastal Tundra

Torngat Mountain Tundra

The figures included in the Graphical Displays and Histograms sections of this volume are in Adobe Acrobat format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.

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