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Dissected Loess Uplands

Ecoregion on Columbia Plateau in WA, ID

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The Dissected Loess Uplands ecoregion, located on the northeastern slopes of the Blue Mountains (11), comprises unforested, rolling loess hills, canyons, and flat plateau remnants isolated by the lower canyons of the Snake and Clearwater Rivers (10l). Pure grasslands without a sagebrush component dominate the lower elevations. Shrubs, such as rose and snowberry, appear with increasing moisture at higher elevations. Though grazing and farming have eliminated much of the original plant cover of The Dissected Loess Uplands ecoregion, the region is not as suited to agriculture as are neighboring Ecoregions 10h and 10i because of its dissected terrain and thinner soil. Sharp-tailed grouse, once abundant in shrub covered areas, have been recently reintroduced.

— EPA

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