Folders: ROOT > ScienceBase Catalog > Forest and Rangeland Ecosystem Science Center (FRESC) > FRESC Public Data > SAGEMAP ( Show all descendants )
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ROOT _ScienceBase Catalog __Forest and Rangeland Ecosystem Science Center (FRESC) ___FRESC Public Data ____SAGEMAP
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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...
This map depicts the distribution of existing vegetation types contained in the LANDFIRE dataset. All 30-meter EVT grids were resampled to 90-meter grids and merged to create the final product.
Categories: Data;
Types: Downloadable,
Map Service,
Shapefile;
Tags: Arizona,
California,
Colorado,
Distribution,
Ecological System,
Data are contained in a Microsoft Access database consisting of 27 data tables. Tables provided include emergency stabilization and rehabilitation (ESR) projects sampled, study plot characteristics, and sampled vegetation and fuels data. All data are from Bureau of Land Management (BLM) federal lands within the Great Basin region of the intermountain west. These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release.
This layer represents lines which have been proposed (per the requirements of Section 368 of the Energy Policy Act of 2005) as West-wide energy corridor centerlines for the final "Programmatic Environmental Impact Statement, Designation of Energy Corridors on Federal Land in the 11 Western States", November 2008.
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Arizona,
California,
Colorado,
Idaho,
Montana,
The Wyoming Basins are one of the remaining strongholds of the sagebrush ecosystem. However, like most sagebrush habitats, threats to this region are numerous. The Wyoming Basins Ecoregional Assessment adds to current knowledge about the regional status of the sagebrush ecosystem, the distribution of habitats, the threats to the ecosystem, and the influence of threats and habitat conditions on occurrence and abundance of sagebrush associated fauna and flora in the Wyoming Basins. Comprehensive methods are outlined for use in data collection and monitoring of wildlife and plant populations. Field and spatial data are integrated into a spatially explicit analytical framework to develop models of species occurrence...
Greater sage-grouse Centrocercus urophasianus (Bonaparte) currently occupy approximately half of their historical distribution across western North America. Sage-grouse are a candidate for endangered species listing due to habitat and population fragmentation coupled with inadequate regulation to control development in critical areas. Conservation planning would benefit from accurate maps delineating required habitats and movement corridors. However, developing a species distribution model that incorporates the diversity of habitats used by sage-grouse across their widespread distribution has statistical and logistical challenges. We first identified the ecological minimums limiting sage-grouse, mapped similarity...
Greater sage-grouse (Centrocercus urophasianus) once occupied parts of 12 states within the western United States and 3 Canadian provinces. Populations of greater sage-grouse have undergone long-term population declines. The sagebrush (Artemisia spp.) habitats on which sage-grouse depend have experienced extensive alteration and loss. Consequently, concerns raised for the conservation and management of greater sage-grouse and their habitats have resulted in petitions to list greater sage-grouse under the Endangered Species Act. In this report, we assessed the ecological status and potential factors that influenced greater sage-grouse and sagebrush habitats across their entire distribution. We used a large-scale...
Humans have dramatically altered wildlands in the western United States over the past 100 years by using these lands and the resources they provide. Anthropogenic changes to the landscape, such as urban expansion and development of rural areas, influence the number and kinds of plants and wildlife that remain. In addition, western ecosystems are also affected by roads, powerlines, and other networks and land uses necessary to maintain human populations. The cumulative impacts of human presence and actions on a landscape are called the “human footprint.” These impacts may affect plants and wildlife by increasing the number of synanthropic (species that benefit from human activities) bird and mammal predators and...
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...
Categories: Data;
Types: Downloadable,
Map Service,
Shapefile;
Tags: Bromus tectorum,
Cheatgrass,
Ecosystem models,
Great Basin,
Risk Assessment,
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