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The sand desert shrub (SDS) is a plant community, or vegetation type, found in the Colorado Plateau and Canyonlands region in areas of shifting sands or very sandy soils. [1]: 3 Dominant plant species include old man sage (Artemisia filifolia), yucca, Indian ricegrass (Stipa hymenoides), and wavy leaf oak (Quercus welshii).
Oklahoma topographical map Geographic map of Oklahoma. The Geography of Oklahoma encompasses terrain and ecosystems ranging from arid plains to subtropical forests and mountains. Oklahoma contains 10 distinct ecological regions, more per square mile than in any other state by a wide margin. [1]
In the United States, the EPA and the United States Geological Survey (USGS) are the principal federal agencies working with the CEC to define and map ecoregions. Ecoregions may be identified by similarities in geology, physiography, vegetation, climate, soils, land use, wildlife distributions, and hydrology.
A map of the Colorado Plateau. The Four Corners region and the Colorado Plateau.. The Colorado Plateau is a physiographic and desert region of the Intermontane Plateaus, roughly centered on the Four Corners region of the southwestern United States.
Ecoregions of North America, featuring the 50 United States, the District of Columbia and the five inhabited territories. The following is a list of ecoregions in the United States as identified by the World Wide Fund for Nature (WWF).
The southwestern tablelands comprise an ecoregion running from east-central to south-east Colorado, east-central and a small portion of eastern New Mexico, some eastern portions of the Oklahoma Panhandle, far south-central Kansas, and portions of northwest Texas. This ecoregion has a "cold semiarid" climate (Köppen BSk).
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The main plant communities, or zones, are woodlands, mountain woodlands, and grassland and shrub. The woodland zone, or pinyon-juniper woodland, covers the largest area.. It consists of open woodlands of short trees, mostly pinyon pine (Pinus edulis throughout the ecoregion, and Pinus monophylla subsp. fallax in the southwestern portion of the ecoregion) and species of juniper (Juniperus spp