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The Eastern Cascades Slopes and Foothills ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) in the U.S. states of Oregon, Washington, and California. In the rain shadow of the Cascade Range, the eastern side of the mountains experiences greater temperature extremes and receives less precipitation than the west side. Open forests of ponderosa pine and some lodgepole pine distinguish this region from the Cascades ecoregion, where hemlock and fir forests are more common, and from the lower, drier ecoregions to the east, where shrubs and grasslands are predominant. The vegetation is adapted to the prevailing dry, continental climate and frequent wildfire. Volcanic cones and buttes are common in much of the region.

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  • The Eastern Cascades Slopes and Foothills ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) in the U.S. states of Oregon, Washington, and California. In the rain shadow of the Cascade Range, the eastern side of the mountains experiences greater temperature extremes and receives less precipitation than the west side. Open forests of ponderosa pine and some lodgepole pine distinguish this region from the Cascades ecoregion, where hemlock and fir forests are more common, and from the lower, drier ecoregions to the east, where shrubs and grasslands are predominant. The vegetation is adapted to the prevailing dry, continental climate and frequent wildfire. Volcanic cones and buttes are common in much of the region. The Eastern Cascades Slopes and Foothills ecoregion has been subdivided into ten Level IV ecoregions, as described below. Level IV mapping is not yet complete in California, and the information below includes only the sections in Washington and Oregon. (en)
  • L'écorégion appelée par le WWF forêts orientales de la chaîne des Cascades est une région montagneuse qui s’étend dans les États de Washington et de l’Oregon au nord-ouest des États-Unis jusqu’au nord de la Californie. Cette écorégion, composée essentiellement d'une forêt de conifères, occupe 55 200 km2 et se compose en grande partie de la section orientale de la chaîne des Cascades. La zone accueille des aires sauvages comme la William O. Douglas Wilderness, la Norse Peak Wilderness, la Mount Adams Wilderness et la Indian Heaven Wilderness. Par rapport à l’écorégion forêts du centre et du sud de la chaîne des Cascades située plus à l’ouest, la zone se caractérise par un climat plus sec ce qui a un impact sur le type de végétation. La zone est essentiellement couverte de forêts de conifères comme le Pin ponderosa, le Sapin de Douglas et le Sapin subalpin. À basse altitude, le Genévrier occidental est très présent. (fr)
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  • United States (en)
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  • The Pumice Plateau, looking west toward the Oregon Cascade Volcanoes (en)
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  • Eastern Cascades Slopes and Foothills (en)
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  • Eastern Cascades Slopes and Foothills ecoregion (en)
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  • California (en)
  • Oregon (en)
  • Washington (en)
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  • The Eastern Cascades Slopes and Foothills ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) in the U.S. states of Oregon, Washington, and California. In the rain shadow of the Cascade Range, the eastern side of the mountains experiences greater temperature extremes and receives less precipitation than the west side. Open forests of ponderosa pine and some lodgepole pine distinguish this region from the Cascades ecoregion, where hemlock and fir forests are more common, and from the lower, drier ecoregions to the east, where shrubs and grasslands are predominant. The vegetation is adapted to the prevailing dry, continental climate and frequent wildfire. Volcanic cones and buttes are common in much of the region. (en)
  • L'écorégion appelée par le WWF forêts orientales de la chaîne des Cascades est une région montagneuse qui s’étend dans les États de Washington et de l’Oregon au nord-ouest des États-Unis jusqu’au nord de la Californie. Cette écorégion, composée essentiellement d'une forêt de conifères, occupe 55 200 km2 et se compose en grande partie de la section orientale de la chaîne des Cascades. La zone accueille des aires sauvages comme la William O. Douglas Wilderness, la Norse Peak Wilderness, la Mount Adams Wilderness et la Indian Heaven Wilderness. (fr)
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  • Eastern Cascades Slopes and Foothills (en)
  • Forêts orientales de la chaîne des Cascades (fr)
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