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This data set maps sagebrush mortality in Utah delineated by Utah Division of Wildlife Resources personnel during the summer of 2003.
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A new regional dataset was produced using decision tree classifier and other techniques to model landcover. Multi-season satellite imagery (Landsat ETM+, 1999-2003) and digital elevation model (DEM) derived datasets (e.g. elevation, landform, aspect, etc.) were utilized to derive rule sets for the various landcover classes. Eleven mapping areas, each characterized by similar ecological and spectral characteristics, were modeled independently of one another. An internal validation for modeled classes was performed on a withheld 20% of the sample data to assess model performance. Results of the validation will be presented in the final report and are not available at this time. Mapping area models were mosaicked to...
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Land management practices often directly alter vegetation structure and composition, but the degree to which ecological processes such as herbivory interact with management to influence biodiversity is less well understood. We hypothesized that intensive forest management and large herbivores have compounding effects on early-seral plant communities and plantation establishment (i.e., tree survival and growth), and the degree of such effects is dependent on the intensity of management practices. We established 225 m2 wild ungulate (deer and elk) exclosures nested within a manipulated gradient of management intensity (no-spray Control, Light herbicide, Moderate herbicide and Intensive herbicide treatments), replicated...
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Landscape level stratification of ecoregions in the Blue Mountain study area. Study area was defined by watershed boundaries because the pathways and distribution of anadromous fish and determined by watershed linkages and landscape characteristics.
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This coverage provides an estimate of the highest annual average wind resource potential in the Greater Sage-grouse Conservation Assessment (CA) area. Wind power was measured at 50 meters above ground level. The vector data used to create this file was originally derived from a raster dataset (200m resolution) by the National Renewable Energy Laboratory. The original data provides seven "Wind Power Classes" to distinguish wind power density (W/m2). Only the highest wind power classes that fell within the CA boundary are represented in this dataset.
This data set depicts federal lands having restrictions on access or activities -- that is, lands mangaed by the National Park Service, Defense Department, or Energy Department -- in western North America. The data set was created by reformatting and merging state- and province-based ownership data layers originally acquired from diverse sources (including state GAP programs, USBLM state offices and other sources). For each original dataset 3 additional fields, "Pub_Pvt", "CA_OWN", and "SOURCE" were added and populated based on the specific ownership information contained in the source data. The original coverages were then merged based on the "CA_OWN" field. Finally, NPS, DOD, and DOE lands were selected out of...
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Among threats to the sagebrush ecosystem in the Great Basin and elsewhere (BLM 1999, 2002; Nachlinger et al. 2001; Wisdom et al. 2003) is the threat of displacement of native habitats by cheatgrass (Bromus tectorum). Mapping these threats in the sagebrush ecosystem will allow managers to identify areas of native vegetation at high risk of displacement, where active restoration may be required, versus areas at low risk, where conservation of existing habitats may be preferable. A draft model of risk of displacement of sagebrush and other native vegetation cover types by cheatgrass was applied to the 14 ecological provinces that intersect the Great Basin. The model was applied to sagebrush cover and other vegetation...
    map background search result map search result map Landscape-level ecoregions for seven contiguous watersheds, Northeast Oregon and Southeast Washington Current Distribution of Sagebrush and Associated Vegetation in the Columbia Basin and Southwestern Regions Risk of Cheatgrass Displacement of Sagebrush and other Native Vegetation Highest Wind Resource Potential in the Greater Sage-grouse Conservation Area Restricted Access Federal Lands in Western North America Sagebrush Mortality in Utah - 2003 Forest management and cervid herbivory data from Western Oregon, USA, 2012 Forest management and cervid herbivory data from Western Oregon, USA, 2012 Landscape-level ecoregions for seven contiguous watersheds, Northeast Oregon and Southeast Washington Sagebrush Mortality in Utah - 2003 Highest Wind Resource Potential in the Greater Sage-grouse Conservation Area Risk of Cheatgrass Displacement of Sagebrush and other Native Vegetation Current Distribution of Sagebrush and Associated Vegetation in the Columbia Basin and Southwestern Regions Restricted Access Federal Lands in Western North America