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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

Bailey Ecoregions — Index Maps
(Click on an index map to view the graphical display for that ecoregion.)

Index Map
POLAR DOMAIN

Index Map
Icecap Division

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Glacial ice

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Tundra Division

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Ice and stoney deserts

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Arctic tundras

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Tundras

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Tundra Mountains

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Polar desert

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Tundra - polar desert

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Tundra - meadow

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Oceanic meadow - heath

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Subarctic Division

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Forest-tundras and open woodlands

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Tayga (boreal forests)

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Subarctic Mountains

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Open woodland - tundra

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Tayga - tundra, medium

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Tayga - tundra, high

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HUMID TEMPERATE DOMAIN

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Warm Continental Division

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Mixed deciduous-coniferous forests

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Warm Continental Mountains

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Mixed forest - coniferous forest - tundra, medium

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Mixed forest - coniferous forest - tundra, high

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Hot Continental Division

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Broadleaved forests, oceanic

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Broadleaved forests, continental

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Hot Continental Mountains

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Deciduous or mixed forest - coniferous forest - meadow

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Broadleaf forest - meadow

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Subtropical Division

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Broadleaved-coniferous evergreen forests

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Coniferous-broadleaved semi-evergreen forests

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Riverine forest

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Subtropical Mountains

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Mixed forest - meadow

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Marine Division

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Mixed forests

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Marine Mountains

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Deciduous or mixed forest - coniferous forest - meadow

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Forest - meadow, medium

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Forest - meadow, high

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Prairie Division

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Forest-steppes and prairies

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Prairies and savannas

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Mediterranean Division

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Dry steppe

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Mediterranean hardleaved evergreen forests, open woodlands and shrub

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Redwood forests

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Mediterranean Mountains

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Mixed forest - coniferous forest - alpine meadow

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Mediterranean woodland or shrub - mixed or coniferous forest - steppe or meadow

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Shrub or woodland - steppe - meadow

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DRY DOMAIN

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Tropical/Subtropical Steppe Division

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Coniferous open woodland and semideserts

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Steppes

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Steppes and shrubs

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Shortgrass steppes

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Tropical/Subtropical Steppe Mountains

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Steppe or semidesert - mixed forest - alpine meadow or steppe

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Tropical/Subtropical Desert Division

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Semideserts

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Oceanic semideserts

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Deserts on sand

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Tropical/Subtropical Desert Mountains

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Semidesert - shrub - open woodland - steppe or alpine meadow

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Desert or semidesert - open woodland or shrub - desert or steppe

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Temperate Steppe Division

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Steppes

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Dry steppes

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Temperate Steppe Mountains

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Forest-steppe - coniferous forest - meadow - tundra

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Steppe - coniferous forest - tundra

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Steppe - coniferous forest

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Steppe - open woodland - coniferous forest - alpine meadow

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Temperate Desert Division

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Semideserts

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Semideserts and deserts

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Temperate Desert Mountains

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Semidesert - open woodland - coniferous forest - alpine meadow

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HUMID TROPICAL DOMAIN

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Savanna Division

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Open woodlands, shrubs, and savannas

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Semi-evergreen forests

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Deciduous forests

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Savanna Mountains

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Open woodland - deciduous forest - coniferous forest - steppe or meadow

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Forest - steppe

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Rainforest Division

Index Map
Semi-evergreen and evergreen forests

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Evergreen forests

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Rainforest Mountains

Index Map
Evergreen forest - meadow or paramos

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