Filters: Tags: Northern Great Basin Ecoregion (X)
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Development change agents were mosaiced together and the euclidean distance was calculated. Sagebrush communiities were used to extract the distances. The resulting layer was used in the intactness calculation.
Agricultural areas data were extracted from the REA Cropland data layer and analyzed to determine the distance from Bald eagle potential suitable habitat. The quality of a HUC in relation to distance to agricultural areas was defined as good (3), fair (2), or poor (1). The score indicates the threat level for each attribute. A low score indicates a low threat, a medium score indicates a medium threat, and a high score indicates a high threat to the species. The values for each score were characterized in relation to distance from agricultural areas by >5km = good, 1-5km = fair, and
Roads, mines, alternative energy layers were combined and the distance from the Wild Horse and Burro area was calculated using a 4km analysis unit.
SSURGO soils was modified for the ecoregion by supplementing gaps in the SSURGO coverage with STATSGO data. This layer was then converted to a raster to make the layer more manageable with spatial modeling. Recently, NRCS has released a new SSURGO layers that is nationwide (gSSURGO) and it should probably be used in the future.
Wind direction was downloaded for airports within the ecoregion from the Western Regional Climate Center (http://www.wrcc.dri.edu/htmlfiles/westwinddir.html). The annual wind azimuth were used to symbolize wind direction in the atmospheric deposition figures.
WGA Large Intact Blocks Level 2 used for Landscape Integrity Analysis.There was no metadata received with the orginial vector layer.
Percent slope was analyzed by modeling the USGS NED raster for slope values. The slope grid was then reclassified into three categories reflecting the pronghorn’s preference for flat landscapes. Slope values of 5% or less were categorized as preferred and those above 20% were low quality.
Greater sage-grouse key ecological attributes (burn probability, distance to transmission lines, agriculture, etc) were added together to determine an overall score for the analysis unit within the greater sage-grouse PPH.
Types: Downloadable;
Tags: BLM,
Bureau of Land Management,
Cumulative Indicator Score,
DOI,
Geospatial,
303(d) listed waterways was downloaded from the EPA website. Areas listed as 303(d) were extracted and compared to the overall amount of non 303(d) waterways to establish a percentage of waterways that were 303(d).
Wind turbines from the USFWS were analyzed to determine the distance from golden eagle potential suitable habitat. The quality of a HUC in relation to distance to wind turbines was defined as good (3), fair (2), or poor (1). The score indicates the threat level for each attribute. A low score indicates a low threat, a medium score indicates a medium threat, and a high score indicates a high threat to the species. The values for each score were characterized in relation to distance from wind turbines by >16km = good, 10-16km = fair, and
This dataset was developed by the USGS for use in regional climate simulation analyses. These data were applied in the BLM REA analysis for the NGB ecoregion. For more information pertaining to these data and climate modeling, please refer to http://regclim.coas.oregonstate.edu/.
303(d) listed waterways was downloaded from the EPA website. Areas listed as 303(d) were extracted and compared to the overall amount of non 303(d) waterways to establish a percentage of waterways that were 303(d).
Using the NED elevation dataset, the following equation was used to determine the steepness. If percent slope was greater than or e qual to 9% then:Steepness (S) = 16.8 x Sin (Slope Angle) - 0.50Steepness (S) = 10.8 x Sin (Slope Angle) + 0.03
This dataset was developed by the USGS for use in regional climate simulation analyses. These data were applied in the BLM REA analysis for the NGB ecoregion. For more information pertaining to these data and climate modeling, please refer to http://regclim.coas.oregonstate.edu/.
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