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Both tabular and spatial models were used to predict fire regime departure at the sub-watershed scale (i.e., HUC 10 units). Integrating the fire regime models with predicted changes in climate envelopes provides a clearer understanding of how these ecological systems are likely to respond to multiple stresses. The natural range of variability for each CE was initially derived from LANDFIRE Vegetation Dynamics Development Tool (VDDT) models. The VDDT allows for the development of probabilistic quantitative model of CEs consisting of multiple ecological states with both deterministic and probabilistic drivers. For any defined suite of drivers, the models predict the relative abundance of each state within a defined...
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The dataset represents the work of multiple states and Federal agencies as part of the US Gap Analysis and LandFire programs. Multi-season satellite imagery (Landsat ETM+) from 1999-2001 were used in conjunction with digital elevation model (DEM) derived datasets (e.g. elevation, landform) to model natural and semi-natural vegetation. The minimum mapping unit for this dataset is approximately 1 acre. Landcover classes are drawn from NatureServe's Ecological System concept. Five-hundred and fourty-four land cover classes composed of 12 cultural and 532 Natural/Semi-natural types are described. Land cover classes were mapped with a variety of techniques including decision tree classifiers, terrian modeling, inductive...
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The dataset represents the work of multiple states and Federal agencies as part of the US Gap Analysis and LandFire programs. Multi-season satellite imagery (Landsat ETM+) from 1999-2001 were used in conjunction with digital elevation model (DEM) derived datasets (e.g. elevation, landform) to model natural and semi-natural vegetation. The minimum mapping unit for this dataset is approximately 1 acre. Landcover classes are drawn from NatureServe's Ecological System concept. Five-hundred and fourty-four land cover classes composed of 12 cultural and 532 Natural/Semi-natural types are described. Land cover classes were mapped with a variety of techniques including decision tree classifiers, terrian modeling, inductive...
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This simple assessment raster is used to answer management questions (MQs) about where change agents (CAs) overlap with BLM high biodiversity sites (HBS) in the Central Great Basin and Range Ecoregion. This is a basic footprint assessment of anthropogenic features (urban development, roads, etc) represented in the near-future scenario (circa 2030) intersect with HBS. The HBS were derived from source data characterizing locations with concentrated at-risk biodiversity or existing source data of a prioritization exercise that identified areas of high conservation significance. It does not model actual response or condition of the HBS to the CAs. The data intersects two primary classes of information: The CAs consist...
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The dataset represents the work of multiple states and Federal agencies as part of the US Gap Analysis and LandFire programs. Multi-season satellite imagery (Landsat ETM+) from 1999-2001 were used in conjunction with digital elevation model (DEM) derived datasets (e.g. elevation, landform) to model natural and semi-natural vegetation. The minimum mapping unit for this dataset is approximately 1 acre. Landcover classes are drawn from NatureServe's Ecological System concept. Five-hundred and fourty-four land cover classes composed of 12 cultural and 532 Natural/Semi-natural types are described. Land cover classes were mapped with a variety of techniques including decision tree classifiers, terrian modeling, inductive...
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This data is a model of potential habitat connectivity for the Mojave desert tortoise (Gopherus agassizii) for the Mojave Basin and Range ecoregion. Methods for developing this data set: The connectivity modeling software Circuitscape 3.5.7 was used to develop the desert tortoise model. The two inputs needed to model tortoise habitat connectivity with this software were developed in ArcGIS 10. Habitat Input: The USGS model for desert tortoise habitat potential was used to create a series of 167 points representing tortoise habitat throughout the Mojave Basin and Range ecoregion. Areas with high habitat potential (0.7 or higher) were selected and converted to polygons. Polygons smaller than 4,000 acres were removed....
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Both tabular and spatial models were used to predict fire regime departure at the sub-watershed scale (i.e., HUC 10 units). Integrating the fire regime models with predicted changes in climate envelopes provides a clearer understanding of how these ecological systems are likely to respond to multiple stresses. The natural range of variability for each CE was initially derived from LANDFIRE Vegetation Dynamics Development Tool (VDDT) models. The VDDT allows for the development of probabilistic quantitative model of CEs consisting of multiple ecological states with both deterministic and probabilistic drivers. For any defined suite of drivers, the models predict the relative abundance of each state within a defined...
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The Middle–Upper Triassic Shublik Formation is the main source rock for Arctic Alaska oil and gas accumulations, including the supergiant Prudhoe Bay field. A revised stratigraphic framework recently has been developed in outcrop for the Shublik and related strata that delineates three large-scale stratigraphic units: 1) the lower clastic (LC) unit, 2) the middle carbonate-chert (MCC) unit, and 3) the upper clastic-carbonate (UCC) unit. The three stratigraphic units were interpreted to comprise five transgressive-regressive (T-R) sequences (LC1, MCC1, MCC2, MCC3, and UCC1). This outcrop-based framework has been extended to the subsurface of the Alaska North Slope using gamma-ray logs from 161 exploration wells....
The selection of geological basins from the 1995 National Oil and Gas Assessment Province Boundaries that (1) intersected with the historical Sage-grouse geographic range, and (2) contained significant oil and/or natural gas reserves according to the U.S. Geological Central Energy Team. The present data layer was selected from (2) and re-projected to match the Albers projection used in the Rangewide Conservation Assessment.
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Ecological regions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. These general purpose regions are critical for structuring and implementing ecosystem management strategies across international, national, province and state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas.A Roman numeral hierarchical scheme has been adopted for different levels for ecological regions. Level I is the coarsest level, dividing North America...
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The fundamental geologic unit used in the 1995 National Oil and Gas Assessment was the play, which is defined as a set of known or postulated oil and or gas accumulations sharing similar geologic, geographic, and temporal properties, such as source rock, migration pathways, timing, trapping mechanism, and hydrocarbon type. The geographic limit of each play was defined and mapped by the geologist responsible for each province. The play boundaries were defined geologically as the limits of the geologic elements that define the play, such as the limits of the reservoir rock, geologic structures, source rock, and seal lithologies. The only exceptions to this are plays that border the Federal-State water boundary. In...
Categories: Web Site; Tags: 19119 = Lyon, 19149 = Plymouth, 19167 = Sioux, 19193 = Woodbury, 27011 = Big Stone, All tags...
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Cell maps for each oil and gas play were created by the USGS as a method for illustrating the degree of exploration, type of production, and distribution of production in a play or province. Each cell represents a quarter-mile square of the land surface, and the cells are coded to represent whether the wells included within the cell are predominantly oil-producing, gas-producing, both oil and gas-producing, or dry. The well information was initially retrieved from the Petroleum Information (PI) Well History Control System (WHCS), which is a proprietary, commercial database containing information for most oil and gas wells in the U.S. Cells were developed as a graphic solution to overcome the problem of displaying...
Categories: Web Site; Tags: 16003 = Adams, 16009 = Benewah, 16017 = Bonner, 16021 = Boundary, 16049 = Idaho, All tags...
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Ecoregions by EPA region were extracted from the seamless national shapefile. Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. These general purpose regions are critical for structuring and implementing ecosystem management strategies across federal agencies, state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas. The approach used to compile this map is based on the premise that ecological regions can be identified...
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The footprint of the Southern Rockies Landscape Conservation Cooperative, showing level IV ecoregions, as defined by James Omernik (see metadata for citations). The Excel table shows each ecoregion's area (in square meters and acres) and its percent of the total area. From metadata: "Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. A Roman numeral hierarchical scheme has been adopted for different levels for ecological regions." Level I is the coursest division and level IV is the finest. ...
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From metadata: Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. These general purpose regions are critical for structuring and implementing ecosystem management strategies across federal agencies, state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas. The approach used to compile this map is based on the premise that ecological regions can be identified through the analysis of patterns of biotic and abiotic phenomena,...


map background search result map search result map 1995 National Oil and Gas Assessment 1/4-Mile Cells within the Eastern Oregon - Washington Province 1995 National Oil and Gas Assessment Conventional Plays within the Sioux Arch Province SRLCC Level IV Ecoregions (Omernik) Ecoregions of the conterminous U.S. (Omernik) Level III North Pacific LCC Ecoregions Level III Ecoregions of EPA Region 9 - United States Oil and Natural Gas Producing Basins in the Sage-grouse Historical Range BLM REA MBR 2010 NatureServe Terrestrial Ecological Systems Mogollon Chaparral BLM REA MBR 2010 Ecological System Fire Regime Departure 2025 - Great Basin Pinyon-Juniper Woodland BLM REA MBR 2010 Assessment Desert Tortoise Habitat Connectivity Model BLM REA MBR 2010 NatureServe Terrestrial Ecological Systems SonoraMidElevDesertScrub BLM REA MBR 2010 NatureServe Terrestrial Ecological Systems SMCreosotebushWhiteBursageDesertScrub BLM REA MBR 2010 CBR Near-Future Scenario Footprint Assessment Change Agent/High Biodiversity Sites Intersect BLM REA MBR 2010 Ecological System Fire Regime Departure 2025 - SonoraMojaveSemiDesertChaparral Subsurface stratigraphic picks of the Middle–Upper Triassic Shublik Formation, Alaska North Slope 1995 National Oil and Gas Assessment Conventional Plays within the Sioux Arch Province BLM REA MBR 2010 Ecological System Fire Regime Departure 2025 - SonoraMojaveSemiDesertChaparral 1995 National Oil and Gas Assessment 1/4-Mile Cells within the Eastern Oregon - Washington Province BLM REA MBR 2010 NatureServe Terrestrial Ecological Systems Mogollon Chaparral BLM REA MBR 2010 NatureServe Terrestrial Ecological Systems SonoraMidElevDesertScrub BLM REA MBR 2010 NatureServe Terrestrial Ecological Systems SMCreosotebushWhiteBursageDesertScrub BLM REA MBR 2010 CBR Near-Future Scenario Footprint Assessment Change Agent/High Biodiversity Sites Intersect BLM REA MBR 2010 Assessment Desert Tortoise Habitat Connectivity Model Subsurface stratigraphic picks of the Middle–Upper Triassic Shublik Formation, Alaska North Slope BLM REA MBR 2010 Ecological System Fire Regime Departure 2025 - Great Basin Pinyon-Juniper Woodland Level III Ecoregions of EPA Region 9 - United States Oil and Natural Gas Producing Basins in the Sage-grouse Historical Range North Pacific LCC Ecoregions SRLCC Level IV Ecoregions (Omernik) Ecoregions of the conterminous U.S. (Omernik) Level III