Nearctica - Ecology - Ecoregions of the United States

Ecoregions of the United States - Provinces

Special Segments General Topics

Go to Ecoregions Main Page

Go to Domains Main Page

Go to Divisions Main Page

Description of the Ecoregions of the United States

Robert G. Bailey, U.S. Forest Service, USDA, March 1995

Ecosystem Provinces

You may reach descriptions of each of the ecosystem provinces by either clicking on either of the two maps or choosing the province from the list of provinces following the maps. The first map shows ecosystems in Alaska, Hawaii, and Puerto Rico. The second map contains provinces in the continental United States.

Continental United States Map

Alaska, Hawaii, and Puerto Rico

100 POLAR DOMAIN

120 Tundra Division

124 Arctic Tundra Province

125 Bering Tundra (Northern) Province

126 Bering Tundra (Southern) Province

M120 Tundra Division - Mountain Provinces

M121 Brooks Range Tundra--Polar Desert Province

M125 Seward Peninsula Tundra--Meadow Province

M126 Ahklun Mountains Tundra--Meadow Province

M127 Aleutian Oceanic Meadow--Heath Province

130 Subarctic Division

131 Yukon Intermontane Plateaus Tayga Forest

135 Coastal Trough Humid Tayga Province

139 Upper Yukon Tayga Province

M130 Subarctic Division - Mountain Provinces

M131 Yukon Intermontane Plateaus Tayga--Meadow Province

M135 Alaska Range Humid Tayga--Tundra--Meadow

M139 Upper Yukon Tayga--Meadow Province

400 HUMID TROPICAL DOMAIN

M410 Savanna Division - Mountain Provinces

M411 Puerto Rico Province

420 Rainforest Division

M423 Hawaiian Islands Province

CONTINENTAL UNITED STATES

Click on a specific PROVINCE in the map above or the list below

200 HUMID TEMPERATE DOMAIN

210 Warm Continental Division

212 Laurentian Mixed Forest Province

M210 Warm Continental Division - Mountain Provinces

M212 Adirondack-New England Mixed Forest--Coniferous Forest--Alpine Meadow Province

220 Hot Continental Division

221 Eastern Broadleaf Forest (Oceanic) Province

222 Eastern Broadleaf Forest (Continental) Province

M220 Hot Continental Division - Mountain Provinces

M221 Central Appalachian Broadleaf Forest--Coniferous Forest--Meadow Province

M222 Ozark Broadleaf Forest--Meadow Province

230 Subtropical Division

231 Southeastern Mixed Forest Province

232 Outer Coastal Plain Mixed Forest Province

234 Lower Mississippi Riverine Forest Province

M230 Subtropical Division - Mountain Provinces

M231 Ouachita Mixed Forest--Meadow Province

240 Marine Division

242 Pacific Lowland Mixed Forest Province

M240 Marine Division - Mountain Provinces

M242 Cascade Mixed Forest--Coniferous Forest--Alpine Meadow Province

M244 Pacific Coastal Mountains Forest--Meadow Province

M245 Pacific Gulf Coastal Forest--Meadow Province

250 Prairie Division

251 Prairie Parkland (Temperate) Province

255 Prairie Parkland (Subtropical) Province

260 Mediterranean Division

261 California Coastal Chaparral Forest and Shrub Province

262 California Dry Steppe Province

263 California Coastal Steppe, Mixed Forest, and Redwood Forest Province

M260 Mediterranean Division - Mountain Provinces

M261 Sierran Steppe--Mixed Forest--Coniferous Forest--Alpine Meadow Province

M262 California Coastal Range Open Woodland-Shrub-Coniferous Forest--Meadow Province

300 DRY DOMAIN

310 Tropical/Subtropical Steppe Division

311 Great Plains Steppe and Shrub Province

313 Colorado Plateau Semidesert Province

315 Southwest Plateau and Plains Dry Steppe and Shrub Province

M310 Tropical/Subtropical Steppe Division - Mountain Provinces

M313 Arizona-New Mexico Mountains Semidesert-Open Woodland--Coniferous Forest--Alpine Meadow Province

320 Tropical/Subtropical Desert Division

321 Chihuahuan Semidesert Province

322 American Semidesert and Desert Province

330 Temperate Steppe Division

331 Great Plains-Palouse Dry Steppe Province

332 Great Plains Steppe Province

M330 Temperate Steppe Division - Mountain Provinces

M331 Southern Rocky Mountain Steppe--OpenWoodland--Coniferous Forest--Alpine Meadow Province

M332 Middle Rocky Mountain Steppe--Coniferous Forest--Alpine Meadow Province

M333 Northern Rocky Mountain Forest-Steppe--Coniferous Forest--Alpine Meadow Province

M334 Black Hills Coniferous Forest Province

340 Temperate Desert Division

341 Intermountain Semidesert and Desert Province

342 Intermountain Semidesert Province

M340 Temperate Desert Division - Mountain Provinces

M341 Nevada-Utah Mountains Semidesert--Coniferous Forest--Alpine Meadow Province

400 HUMID TROPICAL DOMAIN

410 Savanna Division

411 Everglades Province