Ecoregions of the United States - Divisions
Special Segments General Topics
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Ecoregions of the United States - Divisions |
Special Segments General Topics
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You can access descriptions of the divisions by clicking on the appropriate region in the two maps below or by choosing the link in the list of divisions following the map of the Continental United States. Please note that many of the divisions are divided into montane and lowland subdivisions and that clicking on either subdivision (color) will lead you to the same division description. More detailed information on the provinces contained within each division will be found by going to the provinces segment of this manual.
ALASKA, HAWAII, AND PUERTO RICO
100 POLAR DOMAIN
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
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
200 HUMID TEMPERATE DOMAIN
212 Laurentian Mixed Forest Province
M210 Warm Continental Division - Mountain Provinces
M212 Adirondack-New England Mixed Forest--Coniferous Forest--Alpine Meadow Province
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
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
242 Pacific Lowland Mixed Forest Province
M240 Marine Division - Mountain Provinces
M242 Cascade Mixed Forest--Coniferous Forest--Alpine Meadow Province
251 Prairie Parkland (Temperate) Province
255 Prairie Parkland (Subtropical) Province
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
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
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
411 Everglades Province
M410 Savanna Division - Mountain Provinces
M411 Puerto Rico Province
M420 Rainforest Division - Mountain Provinces
M423 Hawaiian Islands Province
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