Central Basin and Range ecoregion

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This article is about the ecoregion designated by the EPA. For the associated United States physiographic region, see Great Basin section.
Basin range province.jpg
Central Basin and Range from space
(central-west Nevada region, view due-south)
Level III ecoregions, Pacific Northwest.png
Central Basin and Range ecoregion (13)
Ecology
Ecozone Nearctic
Biome North American Desert
Borders Northern Basin and Range (ecoregion) (80), Sierra Nevada (ecoregion) (5) and Wasatch and Uinta Mountains (ecoregion) (19)
Geography
Country United States
States Nevada, Utah, California and Idaho

The Central Basin and Range ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) with 26 different Level IV ecoregions.[1] Its northern boundary is determined by the highest historical shoreline of Pleistocene Lake Bonneville.

Central Basin and Range
Level IV ecoregions
code
13a Salt Deserts
13b Shadscale-Dominated Saline Basins
13c Sagebrush Basins
Sagebrush Slopes
13d Woodland Low Mountains
Shrub-Covered Low Mountains
13e Carbonate High Elevation Mountains
13g Wetlands
13h Lahontan Playas
Tonopah Playas
13j Lahontan Salt Shrub Basin
13k Lahontan Sagebrush Slopes
13l Lahontan Uplands
13m Upper Humboldt Plains
13n Mid-Elevation Ruby Mountains
13o High Elevation Ruby Mountains
13p Carbonate Sagebrush Valleys
13q Carbonate Woodland
13r Central Nevada High Valleys
13s Central Nevada Mid-Slope Woodland
Central Nevada Mid-Slope Brushland
13t Central Nevada Bald Mountains
13u Tonopah Basin
13v Tonopah Sagebrush Foothills
13w Tonopah Uplands
13x Sierra Nevada-Influenced Ranges
13y Sierra Nevada-Influenced High Elevation Mountains
13z Upper Lahontan Basin
13aa Sierra Nevada-Influenced Semiarid Hills
Sierra Nevada-Influenced Semiarid Basins
Lightning-sparked wildfires are common occurrences in the Central Basin and Range.

Salt Deserts[edit]

The Salt Deserts are Level IV ecoregions within the Central Basin and Range between 41°N and 37.5°N latitude (many at geographic sinks) and generally surrounded by Shadscale-Dominated Saline Basins. The largest includes Utah's Great Salt Lake Desert and extends into 2 areas of Nevada (N & S of West Wendover), and the smallest are at Farmington, Utah,[2] and south of Nevada's Ruby Lake National Wildlife Refuge.[3] Several Salt Deserts are around ~50% of the Great Salt Lake, another in Utah is at Sevier Lake, and those entirely in Nevada are:[3]

Shadscale-Dominated Saline Basins[edit]

The Shadscale-Dominated Saline Basins Level IV ecoregions are distinguished from Salt Deserts by the predominance of Great Basin shrub.

References[edit]

  1. ^ Bryce, S.A; et. al, Ecoregions of Nevada (poster), Reston, Virginia: USGS 
  2. ^ a b c Bryce, S.A; et. al, Ecoregions of Utah, Reston, Virginia: United States Geological Survey 
  3. ^ a b Bryce, S.A; et. al, Ecoregions of Nevada, Reston, Virginia: United States Geological Survey