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Southern Forested Mountains

Ecoregion in Rocky Mountains, ID

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The Southern Forested Mountains ecoregion is mantled by droughty soils derived from granitic rocks and is only marginally affected by maritime influence. Forest diversity is less than in wetter Ecoregion 16b. Open Douglas-fir is common, grand fir and subalpine fir occur at higher elevations, and ponderosa pine grows in canyons. Mountain sagebrush and forest are found in the south. Streams are subject to high sediment loading when soils are disturbed. Macroinvertebrate assemblages are distinct from those of Ecoregion 16i.

— EPA

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