Filters: Tags: Sonoran Desert (X)
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This dataset provides an estimate of current terrestrial intactness, based on a fuzzy logic model that integrates multiple measures of landscape development and vegetation intactness. A powerpoint version of the logic model is available at: Vector\Conservation_Elements\Terrestrial\Ecosystem\Documentation\SOD_TI_logic_models.pptx This model integrates agriculture development (from LANDFIRE EVT v1.1), urban development (from LANDFIRE EVT v1.1 and NLCD Impervious Surfaces), linear development (from BLM GTLF, utility lines, and pipelines), energy and mining development (from state mine and USGS national mines datasets, geothermal wells, and oil/gas wells), invasive vegetation (multiple sources combined for invasives...
This map layer portrays the current routes used for conducting Breeding Bird Surveys in the lower 48 States, clipped to the HUC5/ecoregion boundary for the Sonoran Desert ecoregion. The digital data sets are used to create electronic and hard copy maps of the Breeding Bird Survey routes. The data can be used to conduct geographic analysis on national and large regional scales. The data should be displayed and analyzed at scales appropriate for 1:100,000-scale data. No responsibility is assumed by the National Atlas of the United States or by USGS Patuxent Wildlife Research Center in the use of these data.
This dataset depicts watersheds (HUC5) that contain observations of lowland leopard frogs more recent than 1980. Observations were derived from data Arizona Natural Heritage program (proprietary, cannot be shared with BLM or public).
This dataset depicts developed recreation sites from the BLM Kingman Field Office. This dataset was provided directly by BLM Arizona State Office to Conservation Biology Institute (CBI) without metadata. Information contained in this dataset record was completed by CBI.
This dataset depicts recreation sites compiled for BLM and USFS lands. Due to a general lack of quality recreation site information, this dataset likely under-represents the distribution and density of recreation sites, and only contains recreation sites on public lands. Additional recreation sites likely occur on state, local, and privately-owned land, but no data were available at the time of this REA. Recreation sites may have varying areas of impact, as some recreation sites may be large campgrounds whereas other sites are highly localized, such as trailheads. Source datasets had highly variable attributes. These attributes were not carried through into this dataset. Please see the source attribute in this dataset...
GIS dataset of the developed recreation sites (polygons) identified in the Lake Havasu Field Office RMP 2007. This dataset is limited to the Colorado River area where most of the recreation sites are located. The dataset includes BLM campgrounds and day use areas, along with concession leases. Additional recreation sites are in the RecreationSites_point.shp dataset. These recreation areas are on BLM lands in Arizona and California within the Lake Havasu Field Office.
This dataset presents the current potential distribution of this species within the context of current terrestrial intactness and long-term potential for energy development (1KM reporting units). Current terrestrial intactness is based on current measures of landscape development, fire regime and vegetation impacts, and fragmentation. Long-term potential for energy development is based on areas of potential for wind, solar, and petroleum development derived from multiple sources. These models present one possible set of estimates of the status and potential for change for this conservation element. Many additional factors may affect this conservation element beyond those captured in these models; these attributes...
This dataset depicts the current predicted distribution of Le Conte's Thrasher compiled from Arizona Game and Fish Department and California GAP data sources.
This map shows the current predicted distribution of desert tortoise (Mojave and Sonoran populations), along with current and near-term status, and long term potential for change. 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 to carefully consider the content of the metadata file associated...
This dataset shows areas of increased or decreased potential for human or naturally-caused fires between Maxent projections based on near-term climate and current climate.
Difference of Potential Evapotranspiration simulated by the biogeography model MAPSS using RegCM3 climate with GFDL projections as boundary conditions. Units are millimeters of water. MAPSS (Mapped Atmosphere-Plant-Soil System) is a static biogeography model that projects potential vegetation distribution and hydrological flows on a grid (http://www.databasin.org/climate-center/features/mapss-model). MAPSS has been used widely for various climate change assessments including the 2000 National Assessment Synthesis Team's report. MAPSS uses long term, average monthly climate data (mean monthly temperature, vapor pressure, wind speed, and precipitation) as well as soils information (texture, depth). Based on a set...
This dataset shows areas burned by wildfire between 1999 and 2010 derived from fire perimeter and LANDFIRE disturbance datasets (Prescribed fires were not included in this analysis.). Where available, this dataset shows fire severity information.
Difference of Runoff (2045-2060 vs 1968-1999) simulated by the biogeography model MAPSS using RegCM3 climate with ECHAM5 projections as boundary conditions. Units are millimeters of water. MAPSS (Mapped Atmosphere-Plant-Soil System) is a static biogeography model that projects potential vegetation distribution and hydrological flows on a grid (http://www.databasin.org/climate-center/features/mapss-model). MAPSS has been used widely for various climate change assessments including the 2000 National Assessment Synthesis Team's report. MAPSS uses long term, average monthly climate data (mean monthly temperature, vapor pressure, wind speed, and precipitation) as well as soils information (texture, depth). Based on a...
Climate data (Average Annual Temperature for 1968-1999) were created by PRISM (Parameter-elevation Regressions on Indepenent Slopes Model - prism.oregonstate.edu) on a 2.5 arc-minute lat-lon grid. They are based on historical observations from 1968-1999. We created mean monthly climatologies for that period from the PRISM data, and reprojected the results to the BLM Albers 4km grid. We used these results as a historical baseline climate to de-bias RegCM3 projections. We also compiled annual and seasonal summaries of precipitation and temperature from the PRISM data to allow for simple comparisons with other climatologies. Units are degrees celsius.
Average Winter (Jan-Mar) Temperature (2045-2060) simulated by RegCM3 with ECHAM5 projections as boundary conditions. Units are degrees Celsius. These data were generated by the regional climate model RegCM3 with boundary conditions from a GCM future climate projections. The data were downscaled statistically by calculating differences (anomalies) between the RegCM3 results with GCM-driven boundary conditions for 1968-99 and those for a future period, in this case 2015-2030. The anomalies were added (temperatures) or multiplied (precipitation) to a climate baseline from PRISM (Parameter-elevation Regressions on Indepenent Slopes Model - prism.oregonstate.edu) data based on historical observations. The PRISM baseline...
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, including...
This dataset shows the distribution of invasive aquatic species compiled from the USGS nonindigenous aquatic species database and national institute of invasive species science database. These species include asian clams, Quagga mussels, and zebra mussels.
This dataset depicts the near term (2015-2030) predicted distribution of major invasive vegetation species in the Sonoran Desert Ecoregion. It shows the combination of all areas predicted to have current distribution of invasive vegetation species, in addition to areas predicted in the near term Sahara mustard probability model, based on near term climate (2015-2030, derived from RegCM3 based on ECHAM5 boundary conditions). This dataset does not show range contractions of invasive vegetation species, only range expansions, due to the way that source datasets were combined. This is because many species show large inter-annual variability in cover and ecological impacts, and are able to seed-bank for several years...
Average Annual Temperature (2015-2030) simulated by RegCM3 with GENMOM projections as boundary conditions. Units are degrees Celsius. These data were generated by the regional climate model RegCM3 with boundary conditions from a GCM future climate projections. The data were downscaled statistically by calculating differences (anomalies) between the RegCM3 results with GCM-driven boundary conditions for 1968-99 and those for a future period, in this case 2015-2030. The anomalies were added (temperatures) or multiplied (precipitation) to a climate baseline from PRISM (Parameter-elevation Regressions on Indepenent Slopes Model - prism.oregonstate.edu) data based on historical observations. The PRISM baseline was calculated...
This dataset presents the current potential distribution of lowland leopard frog in the context of current and near-term aquatic intactness, and long-term potential for climate change at the watershed (HUC5) scale. Current aquatic intactness is based on current measures of landscape development, water quality, hydrologic impacts, and road impacts. Near-term intactness includes estimates of urban growth. Long-term potential for climate change is based on absolute changes in runoff, precipitation, temperature, and vegetation change estimated using climate projections (RegCM3 regional climate model based on ECHAM5 boundary conditions) and a biogeography model (MAPSS) for the period 2045-2060. The aquatic intactness...
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