Filters: Tags: Central Yukon (X)
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Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - The Relative Flammability raster is a spatial representation of the total number of times each pixel within the Central Yukon REA boundary burned in 1,000 simulations of the Alaska Frame-Based Ecosystem Code (ALFRESCO) model. Pixel counts of simulated burns from 200 runs each of five downscaled Global Climate Models (cccma_cgcm3_1,...
Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - This file includes a downscaled projection of decadal average summer (June, July, August) temperature (in °C) for the decades 2010-2019, 2020-2029, and 2060-2069 at 771x771 meter spatial resolution. The file represents a decadal mean calculated from seasonal averages, which in turn were calculated from monthly means, using...
Rather than using the ARDF to determine future mining activity, which is a work in progress we used additional datasets. Future mines are difficult to predict but we used three datasets to represent future mining activity: Ambler mining belt, Nanushuk coal mine, and USGS mineral potential GIS database (Jones et al. 2015). Jones et al. (2015) documented the potential and certainty of six minerals deposit groups. The mineral resource potential datasets produced by the USGS (Jones et al. 2015) was used in conjunction with access to identify areas with the most likely long-term future mining activity. Mineral resource potential datasets only cover a portion of our study area (63.9% or 252,845 km2) but can still provide...
This map shows the Lowland Woody Wetland conservation element data in the CYR study region. Layers include: Distribution map of the lowland woody wetland CE; Current, near-term, and long-term status of lowland woody wetland in the CYR study area. These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged...
There are a number of oil and gas basins that lay within the CYR study region. Selawik oil and gas basin is considered an eastern extension of the Kotzebue oil and gas basin. However, much of the Selawik basin is located in the Selawik National Wildlife Refuge making development unlikely. Exploration in the Selawik Basin has been minimal with no wells drilled. The Colville Basin runs along the northwestern edge of the CYR study area but exploration within this area is minimal. Wells and exploration in this basin are outside the CYR study area. Doyon has drilled Nunivak #1 and #2 exploratory wells between 2009 and 2013 in the Nenana Basin and acquired 2-D seismic, gravity, magnetics, and lakebed geochemical surveys...
Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Snowshoe hare occur year-round throughout the Taiga of Alaska and inhabit mixed spruce forests, wooded swamps and brushy areas. They prefer dense brush and forest cover, which provide protection from both avian and terrestrial predators. Their diet varies between summer and winter depending on forage availability. In the summer,...
This dataset was developed for the BLM Rapid Ecoregional Assessment for the Central Yukon study area and represents the most recent available annual distribution for the Terrestrial Fine-Filter Conservation Element caribou: Porcupine Herd. The Porcupine Caribou Management Board maintain radio collar and satellite telemetry data for the Porcupine Herd across Alaska, Yukon, and Northwest Territories. Radio collar and satellite telemetry data were not made available to Alaska Center for Conservation Science (ACCS) for the Rapid Ecoregional Assessment (REA). However, collar location data points were used by Griffith et al. (2002) to determine the 1983 to 2001 total annual range for the Porcupine Herd. The total annual...
Large and small connected lakes throughout the CYR study area support a rich biodiversity of aquatic organisms and represent important foraging and breeding habitat for fish, waterfowl, and shorebirds. Additionally, lakes provide important recreational opportunities and food resources for local residents (e.g., subsistence harvest of fish and wildlife). Small and large lakes were identified based on the definition used in Arp and Jones (2009) to differentiate small (less than 0.1 sq km) from medium and large lakes (greater than 0.1 km2). Lake connections, especially for smaller lakes, can vary greatly and change throughout the open-water season, with ephemeral connections commonly occurring during high flows in...
Permit or Lease - Mineral Estate includes a variety of permits or leases including Oil and Gas Lease, Shallow Gas Lease, Exploration License, Geothermal Permit or Lease, Mining Lease, Offshore Prospecting Permit or Lease, Coal Prospecting Permit or Lease. This shape file characterizes the geographic representation of land parcels within the State of Alaska contained by the Mineral Estate-Mineral Permit or Lease category. It has been extracted from data sets used to produce the State status plats. This data set includes cases noted on the digital status plats up to one day prior to data extraction. Each feature has an associated attribute record, including a Land Administration System (LAS) file-type and file-number...
Increasing temperatures across the region will cause a lengthening of the growing season and an increase in heat accumulation (measured as summer warmth index) during summer months. These changes could have profound effects on phenology, plant growth, water availability, and species distributions. July temperature isotherms and SWI have been used to help define vegetation distribution and potential for vegetation change across the boreal and arctic biomes. The northern limit of the boreal forest occurs approximately at the 12°C mean July isotherm and a SWI of 35°C mo, and strong linkages have been described between SWI and treeline advance. The southern boundary for the boreal forest occurs at approximately the...
Elodea (waterweed) is widely recognized as a serious threat to the ecology of freshwater systems – this plant can achieve dense monospecific stands, reduce the flow of water, and alter the chemical composition of the water body, including hyper-eutrophication and oxygen depletion. It is native to North America south of the limit of the former Laurentide ice sheet, south of the southern US-Canada border. This species was first recorded in Alaska in 1982 and in recent years the number of known sites has increased dramatically, especially in those with high use. Historic and future scenarios for elodea climate suitability was based on associations of known locations of Elodea worldwide with 23 climate and topographic...
Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Because of the potential for reindeer to commingle into caribou herds when the two occupy the same range or when caribou migrate through reindeer range, areas within current caribou herd summer ranges were considered to have low biological potential to support reindeer herding for calving season and summer. Similarly, areas...
Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Human activities and resource development can cause herd disturbance, fragmentation of caribou habitat, and increased hunting access to herd ranges. Human activities may result in increased vigilance, avoidance behaviors, and redistribution of animals. In particular, during calving, cows and calves tend to avoid roads. Road...
To estimate the potential of mineral resources in the Bureau of Land Management Central Yukon Planning Area using geographic information systems (GIS) analysis of muliple statewide datasets. The six mineral deposit models are: 1) REE-Th-Y-Nb deposits associated with peralkaline to carbonatitic intrusive rocks, 2) placer and paleoplacer Au, 3) PGE (-Co-Cr-Ni-Ti-V) deposits associated with mafic-to-ultramafic intrusive rocks, 4) carbonate-hosted Cu (-Co-Ag-Ge-Ga) deposits, 5) sandstone U (-V-Cu) deposits, and 6) Sn-W-Mo (-Ta-In-fluorspar) deposits in specialized granites. GIS data layers available for analysis include sediment and rock geochemistry, pan concentrate mineralogy and geochemistry, Alaska Resource Data...
Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - The overall status of the lowland woody wetland CE was assessed by intersecting the LCM with the CE distribution model for the current condition, near-term, and long-term future. The LCM is a way to measure the impact of the human footprint on a landscape. In the current condition, impacts on the lowland woody wetland CE are...
Caribou typically undergo seasonal migrations between summer calving grounds, mosquito-relief areas and winter foraging sites, with migration distances varying amongst herds. In the CYR study area, the larger, arctic herds, undergo seasonal migrations of distances up to 640 km, with annual movements of some caribou totaling more than 5000 km; while the smaller, more regional herds farther south, tend to undergo much shorter seasonal movements. Wider ranging herds include the Western Arctic, Central Arctic and Porcupine herds. The more localized herds include the Fortymile, Galena, Hodzana Hills, Macomb, Ray Mountains, White Mountains and Wolf Mountain herds. The Western Arctic herd has the largest range and most...
Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - This file includes a downscaled projection of decadal average of winter (December, January, February) total precipitation (in millimeters) for the decades 2010-2019, 2020-2029, and 2060-2069 at 771x771 meter spatial resolution. The file represents a decadal mean of seasonal totals calculated from monthly totals, using the...
Because of the potential for reindeer to commingle into caribou herds when the two occupy the same range or when caribou migrate through reindeer range, areas within current caribou herd summer ranges were considered to have low biological potential to support reindeer herding for calving season and summer. Similarly, areas within the current herd annual ranges were considered to have low biological potential to support reindeer herding for late fall, winter, and early spring. Areas of moderate and good quality forage occurred both within and outside of caribou herd ranges for both assessed seasons within the Central Yukon study area but to widely differing extents. The summer ranges of all caribou herds covered...
Some of the CYR rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - Human disturbance in an area can cause habitat abandonment and nest failure for golden eagles. Landscape condition is expected to decrease by 3% throughout the golden eagle habitat distribution in the CYR study area in the next 50 years. These human disturbances may case displacement of current breeding areas and/or a reduction...
The Alaska Exotic Plants Information Clearinghouse (AKEPIC) is a database and mapping application that provide geospatial information for non-native plant species in Alaska and neighboring Canadian Territories. These products are the result of an ongoing cooperation among the U.S. Forest Service, National Park Service, Bureau of Land Management, U.S. Fish and Wildlife Service, Department of Natural Resources Plant Material Center, and Alaska Center for Conservation Science in support of the Alaska Committee for Noxious and Invasive Plants Management (CNIPM) and the Strategic Plan for Noxious and Invasive Plants Management in Alaska. The Alaska Center for Conservation Science administers the mapping application,...
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