Ecological Regions: Level 1 Regions
North AmericaPhysical EnvironmentExtent of the Level I Ecological Regions of North America
EPAA map of North America shows various ecological regions, each marked with a distinct color to represent different Level 1 ecological regions.
Arctic Cordillera (Red): Found in the northernmost parts of Canada, specifically the Arctic Archipelago. Tundra (Blue): Covers large portions of northern Canada, including parts of Nunavut and the Northwest Territories, as well as coastal areas of Alaska. Taiga (Purple): Spans across central and northern Canada, covering parts of Quebec, Ontario, Manitoba, Saskatchewan, Alberta, and British Columbia. Hudson Plain (Orange): Located in the northeastern part of Canada, around the Hudson Bay area. Boreal Forests (Yellow): Encompasses large areas in Canada, south of the tundra and taiga regions, and extends into parts of Newfoundland and Labrador. Northwestern Forested Mountains (Green): Found along the western coast of Canada and the United States, covering parts of British Columbia and Alaska. Marine West Coast Forest (Brown): Occupies the coastal regions of the Pacific Northwest, including areas in British Columbia, Washington, Oregon, and northern California. Eastern Temperate Forests (Pink): Stretch from the Great Lakes region through the northeastern United States and into eastern Canada. Great Plains (Grey): Span the central United States from Canada to Texas, including parts of Alberta, Saskatchewan, Manitoba, and several central U.S. states. Deserts and Steppes (Dark Green): Found in the southwestern United States and northern Mexico, covering areas in Arizona, New Mexico, and parts of California and Nevada. Mediterranean California (Dark Pink): Specific to the coastal regions of central and southern California. Southern Semi-Arid Highlands (Gold): Located in central Mexico and parts of the southwestern United States. Temperate Sierras (Dark Brown): Found in Mexico, primarily in the Sierra Madre ranges. Tropical Dry Forests (Light Brown): Present in parts of southern Mexico and Central America. Tropical Wet Forests (Light Tan): Located in the southeastern part of Mexico and Central America, including the Yucatan Peninsula.
Arctic Cordillera | Tundra | Taiga | Hudson Plain | Boreal forests | Northwestern forested mountains | Marine west coast forest | Eastern temperate forests | Great Plains | Deserts and steppes | Mediterranean California | Southern semi-arid highlands | Temperate sierras | Tropical wet forests | 4.50–4.59 pH | 4.60–4.69 pH | 4.70–4.79 pH | 4.80–4.89 pH | 4.90–4.99 pH | 5.00–5.09 pH | 5.10–5.19 pH | 5.20–5.29 pH | ≥5.30 pH | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alaska | 25.1% | 6.23% | 14.3% | 3.61% | |||||||||||||||||||
Yukon | 7.08% | 38.7% | 53.4% | ||||||||||||||||||||
Northwest Territories | 3.04% | 63.7% | |||||||||||||||||||||
Nunavut | 1.96% | 1.52% | 3.41% | ||||||||||||||||||||
Nova Scotia | 17.5% | 6.61% | |||||||||||||||||||||
Prince Edward Island | 89.2% | ||||||||||||||||||||||
Saskatchewan | 8.06% | 57.8% | 33.4% | ||||||||||||||||||||
New Brunswick | 3.19% | 95.8% | |||||||||||||||||||||
British Columbia | 7.72% | 4.25% | 60.9% | 6.59% | 4.95% | ||||||||||||||||||
Newfoundland and Labrador | 5.23% | 56.9% | 22.4% | ||||||||||||||||||||
Alberta | 17.4% | 54.4% | 6.61% | 21.1% | |||||||||||||||||||
Québec | 1.01% | 37.0% | 2.25% | 3.73% | 1.51% | ||||||||||||||||||
Manitoba | 22.1% | 11.3% | 55.4% | 10.0% | |||||||||||||||||||
Ontario | 28.1% | 64.1% | 7.08% | ||||||||||||||||||||
Arizona | 66.3% | 12.9% | 19.7% | 1.23% | 98.8% | ||||||||||||||||||
Utah | 19.3% | 80.3% | 1.69% | 98.3% | |||||||||||||||||||
District of Columbia | 100% | 100% | |||||||||||||||||||||
Florida | 84.3% | 14.5% | 1.32% | 13.8% | 25.9% | ||||||||||||||||||
Idaho | 57.3% | 40.7% | 4.63% | 95.4% | |||||||||||||||||||
New Hampshire | 82.5% | 17.5% | 72.0% | 27.9% | |||||||||||||||||||
Rhode Island | 92.1% | 2.00% | 3.88% | ||||||||||||||||||||
Vermont | 86.9% | 13.1% | 95.7% | 4.07% | |||||||||||||||||||
Washington | 44.1% | 18.2% | 34.8% | 23.4% | 70.9% | ||||||||||||||||||
Wyoming | 6.11% | 27.1% | 46.4% | 100% | |||||||||||||||||||
Montana | 31.6% | 66.0% | 9.26% | 90.7% | |||||||||||||||||||
Maine | 44.1% | 52.2% | 17.3% | 69.8% | 10.8% | ||||||||||||||||||
North Dakota | 100% | 100% | |||||||||||||||||||||
Kentucky | 100% | 1.72% | 54.3% | 1.61% | 9.53% | ||||||||||||||||||
Virginia | 99.4% | 3.50% | 1.66% | 15.4% | |||||||||||||||||||
Delaware | 98.4% | 17.4% | 81.8% | ||||||||||||||||||||
Mississippi | 99.9% | 14.3% | 79.0% | 5.27% | |||||||||||||||||||
West Virginia | 100% | 7.63% | 45.0% | 12.8% | 8.92% | ||||||||||||||||||
Nebraska | 100% | 100% | |||||||||||||||||||||
Texas | 17.3% | 4.05% | 13.1% | 8.53% | 1.49% | 4.74% | 5.19% | 56.4% | |||||||||||||||
Missouri | 60.6% | 39.4% | 26.1% | 26.9% | 12.0% | 34.2% | |||||||||||||||||
Louisiana | 86.4% | 12.6% | 41.6% | 42.5% | 8.80% | 4.48% | 2.23% | ||||||||||||||||
North Carolina | 99.2% | 1.35% | 37.2% | 1.72% | 9.88% | ||||||||||||||||||
Oregon | 53.3% | 14.9% | 7.11% | 2.68% | 97.3% | ||||||||||||||||||
Alabama | 99.9% | 84.6% | 13.4% | ||||||||||||||||||||
New Mexico | 8.59% | 32.9% | 7.36% | 1.32% | 3.54% | 4.15% | 91.3% | ||||||||||||||||
Kansas | 99.9% | 100% | |||||||||||||||||||||
Wisconsin | 31.7% | 66.5% | 1.10% | 4.01% | 46.8% | 27.3% | 21.3% | ||||||||||||||||
New Jersey | 11.2% | 86.6% | 5.98% | 36.6% | 32.6% | 23.7% | |||||||||||||||||
South Carolina | 99.7% | 33.6% | 64.2% | 2.08% | |||||||||||||||||||
Michigan | 25.2% | 1.08% | 24.0% | 10.0% | 4.73% | 13.3% | |||||||||||||||||
Connecticut | 15.9% | 84.0% | 49.9% | 50.0% | |||||||||||||||||||
Pennsylvania | 3.06% | 79.4% | 3.58% | 34.8% | 29.1% | 10.8% | |||||||||||||||||
Colorado | 38.2% | 42.1% | 2.98% | 1.85% | 3.55% | 88.3% | |||||||||||||||||
Nevada | 99.6% | 100% | |||||||||||||||||||||
Massachusetts | 32.4% | 63.3% | 98.2% | ||||||||||||||||||||
Georgia | 99.9% | 7.01% | 3.21% | 2.51% | 3.47% | ||||||||||||||||||
New York | 19.7% | 1.05% | 4.25% | 52.6% | 35.3% | ||||||||||||||||||
Maryland | 97.9% | 12.5% | 29.8% | 10.3% | |||||||||||||||||||
Oklahoma | 21.6% | 78.4% | 2.73% | 5.70% | 91.6% | ||||||||||||||||||
Tennessee | 100% | 5.63% | 19.5% | 14.5% | 3.55% | ||||||||||||||||||
California | 26.9% | 2.89% | 29.8% | 39.7% | 99.7% | ||||||||||||||||||
Arkansas | 100% | 17.5% | 40.8% | 7.44% | 10.2% | ||||||||||||||||||
South Dakota | 3.94% | 96.1% | 100% | ||||||||||||||||||||
Ohio | 99.9% | 5.07% | 9.56% | 59.7% | 23.0% | ||||||||||||||||||
Indiana | 100% | 12.8% | 4.37% | 8.75% | 5.18% | ||||||||||||||||||
Minnesota | 40.6% | 24.1% | 35.2% | 2.86% | 4.42% | 92.3% | |||||||||||||||||
Iowa | 6.36% | 93.6% | 1.50% | 98.5% | |||||||||||||||||||
Illinois | 99.9% | 39.9% | 27.0% | 15.0% | 3.08% | 9.73% | |||||||||||||||||