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Magnetotelluric data, Southern San Luis Valley, Colorado, 2006: Station 2 This dataset includes the magnetotelluric (MT) sounding data collected in 2006 in the Southern San Luis Valley, Colorado. The U.S. Geological Survey conducted a series of multidisciplinary studies, including MT surveys, in the San Luis Valley to improve understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits comprising the principal groundwater aquifers of the Rio Grande rift. The shallow unconfined and the deeper confined Santa Fe Group aquifers in the San Luis Basin are the main sources of municipal water for the region. The population of the San Luis Valley region is growing rapidly and water shortfalls could have serious consequences. Future growth and land management... Types: Citation; Tags: Colorado, Costilla County, Electromagnetic surveying, GPS measurement, Geophysics, All tags... MT, Magnetic field (earth), Magnetic surveying, Rocky Mountains, San Luis Valley, apparent resistivity, geoscientificinformation, impedance, impedance phase, impedance strike, magnetotelluric, sounding, tipper, Fewer tags FSA 10:1 NAIP Imagery m_2909612_ne_14_1_20141015_20141201 3.75 x 3.75 minute JPEG2000 from The National Map This data set contains imagery from the National Agriculture Imagery Program (NAIP). The NAIP program is administered by USDA FSA and has been established to support two main FSA strategic goals centered on agricultural production. These are increase stewardship of America's natural resources while enhancing the environment, and to ensure commodities are procured and distributed effectively and efficiently to increase food security. The NAIP program supports these goals by acquiring and providing ortho imagery that has been collected during the agricultural growing season in the U.S. The NAIP ortho imagery is tailored to meet FSA requirements and is a fundamental tool used to support FSA farm and conservation programs.... Types: Citation; Tags: 2909612, 3.75 x 3.75 minute, 48089, Aerial Compliance, COLORADO CO TX FSA, All tags... Colorado, Compliance, Digital Ortho rectified Image, Downloadable Data, FRELSBURG, FRELSBURG, NE, JPEG 2000, JPEG2000, NAIP, Ortho Rectification, Orthoimagery, Quarter Quadrangle, TX, TX089, USDA National Agriculture Imagery Program (NAIP), farming, imageryBaseMapsEarthCover, Fewer tags Precipitation (Proportion July - Sep) - 2020-2050 - RCP8.5 - Min Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Temperature (Mean: Annual) - 2020-2050 - RCP8.5 - Min Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Precipitation (Proportion May - Oct) - 1980-2010 Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Precipitation (Proportion May - Oct) - 2070-2100 - RCP4.5 - Min Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Precipitation (Proportion May - Oct) - 2020-2050 - RCP4.5 - Min Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Precipitation (Mean: Apr - June) - 2070-2100 - RCP4.5 - Max Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Precipitation (Mean: Dec - Mar) - 2020-2050 - RCP4.5 - Min Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Temperature (Mean: Annual) - 2020-2050 - RCP4.5 - Max Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Estimation of temporary emigration in male toads Male boreal toads (Bufo boreas) are thought to return to the breeding site every year but, if absent in a particular year, will be more likely to return the following year. Using Pollock's robust design we estimated temporary emigration (the probability a male toad is absent from a breeding site in a given year) at three locations in Colorado, USA: two in Rocky Mountain National Park and one in Chaffee County. We present data that suggest that not all male toads return to the breeding site every year. Our analyses indicate that temporary emigration varies by site and time (for example, from 1992 to 1998, the probability of temporary emigration ranged from 10% to 29% and from 3% to 95% at Lost Lake and Kettle Tarn,... Categories: Publication; Types: Citation, Journal Citation; Tags: Bufo boreas, Colorado, Ecology, USA, amphibians, All tags... boreal toad, capture–recapture, robust design, temporary emigration, Fewer tags The persistence of quaking aspen (Populus tremuloides) in the Grand Mesa Area, Colorado Human activities have caused the decline of numerous species and ecosystems. To promote ecosystem resilience, recent management efforts aim to maintain ecosystem patterns and processes within their historical range of variability. There has been substantial concern that quaking aspen, the most widely distributed tree in North America and the most important deciduous tree in the subalpine forests of the Rocky Mountains, has declined significantly in the western landscape during the 20th century. This reported decline has been attributed to conifer encroachment associated with fire exclusion, as well as other causes. To assess long-term changes in the extent of quaking aspen in a 175000-ha study area in western Colorado,... Categories: Publication; Types: Citation, Journal Citation; Tags: Colorado, Ecological Applications, USA, aspen, fire, All tags... geographic information system (GIS), historical range of variability, populus, reference period, vegetation change, Fewer tags Moisture Relationships in Twelve Northern Desert Shrub Communities Near Grand Junction, Colorado Twelve northern desert shrub communities having the same macroclimate but differing habitats were studies. Arranged in order of decreasing production of live stems plus current growth, the communities were: (1) Sarcobatus vermiculatus (9,172 kg/ha), (2) Grayia spinosa (7,412 kg/ha), (3) Artemisia tridentata (5,474 kg/ha), (4) Chrysothamnus nauseosus (4,836 kg/ha), (5) Atriplex confertifolia (3,194 kg/ha), (6) Eurotia lanata (2,026 kg/ha), (7) Hilaria jamesii-Atriplex confertifolia (1,995 kg/ha), (8) Atriplex corrugata (1,949 kg/ha), (9) Chrysothamnus greenii filifolius (1,866 kg/ha), (10) Atriplex nuttallii (1,309 kg/ha), (11) Elymus salinus (865 kg/ha), and (12) Tetradymia spinosa (564 kg/ha). The communities were... Categories: Publication; Types: Citation, Journal Citation; Tags: Colorado, Ecology, evotranspiration, internal-plant stress, leaf persistence, All tags... phenology, soil salinity, soil-moisture stress, Fewer tags Impacts of recreation trails on exotic and ruderal species distribution in grassland areas along the Colorado Front Range. This study examines the establishment patterns of exotic and ruderal species along trail corridors in grassland areas of the Colorado Front Range. The effects of trail presence, trail age, and trail traffic levels on exotic and ruderal species establishment are explored to ascertain the potential impacts of trails on surrounding vegetation. Established trails exhibited a greater presence of exotic and ruderal species along the immediate trailside, showing that disturbed trailsides tend to encourage the growth of these species over time. Furthermore, the established trails exhibited significantly less native, nonruderal, and overall species richness at the trailside. These trailside patterns did not show a significant... Categories: Publication; Types: Citation, Journal Citation; Tags: Colorado, Environmental Management, Exotic species, Grassland, Recreation trails, All tags... Ruderal species, Springer New York, Trail impacts, Fewer tags Temperature (Mean: Apr - June) - 2020-2050 - RCP8.5 - Mean Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Temperature (Mean: Dec - Mar) - 2070-2100 - RCP8.5 - Min Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Temperature (Minimum: January) - 2070-2100 - RCP8.5 - Mean Future climates are simulated by general circulation models (GCM) using climate change scenarios (IPCC 2014). To project climate change for the sagebrush biome, we used 11 GCMs and two climate change scenarios from the IPCC Fifth Assessment, representative concentration pathways (RCPs) 4.5 and 8.5 (Moss et al. 2010, Van Vuuren et al. 2011). RCP4.5 scenario represents a future where climate policies limit and achieve stabilization of greenhouse gas concentrations to 4.5 W m-2 by 2100. RCP8.5 scenario might be called a business-as-usual scenario, where high emissions of greenhouse gases continue in the absence of climate change policies. The two selected time frames allow comparison of near-term (2020-2050) and longer-term... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Arizona, CRS, California, Climate, Colorado, All tags... Greater Sage-Grouse, Idaho, Kansas, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Precipitation, Resilience, Resistance, Sagebrush, Science Framework, ScienceFramework, South Dakota, Temperature, USDA, USFS, USGS, Utah, Washington, Western States, Wyoming, environment, geoscientificInformation, Fewer tags Occupancy of Random Plots by White-Tailed and Gunnison's Prairie Dogs Areas occupied by white-tailed prairie dogs (WTPD; Cynomys leucurus) and Gunnison's prairie dogs (GPD; C. gunnisoni) are not well-known in Colorado (USA) and elsewhere. Suitable methodology for monitoring changes in populations of WTPD and GPD over broad areas also has not been well established. We evaluated occupancy modeling methodology to establish baseline occupancy rates for WTPD and GPD in Colorado. We estimated that WTPD occupied 24.1% (SE = 12.8) of 47,710 0.25-km2 plots and GPD occupied 7.5% (SE = 1.3) of 158,225 0.25-km2 plots in Colorado during 2004 and 2005. Areas reported as colonies in the Colorado Division of Wildlife's database were not good predictors of WTPD and GPD occupancy. Occupancy rates were... Categories: Publication; Types: Citation, Journal Citation; Tags: Colorado, Cynomys gunnisoni, Cynomys lecurus, Gunnison's prairie dog, Journal of Wildlife Management, All tags... Program MARK, The Wildlife Society, detection probability, monitoring, occupancy estimation, presence–absence, white-tailed prairie dog, Fewer tags Persistence of subalpine forest--meadow ecotones in the Gunnison Basin, Colorado Forests of the southern Rocky Mountains are punctuated by persistent meadows called parks that are dominated by grasses and forbs. In an attempt to elucidate the maintenance of subalpine parks in the Gunnison Basin, Colorado, soil texture and tree morphology differences along 60-m transects spanning the forest-park ecotone were studied in 6 representative parks. Seedling survivorship, percent seed germination, and soil moisture available to plants were also studied along one of the transects in Willow Park. Soil analyses revealed 40% more silt and significantly less sand and clay in all 6 parks (P < 0.001), which supports the traditional hypotheses that edaphic factors are involved in restricting establishment of... Categories: Publication; Types: Citation, Journal Citation; Tags: Colorado, Gunnison Basin, Picea engelmannii, Western North American Naturalist, forest-meadow ecotones, All tags... park, seed germination, seedling establishment, soil moisture, soil texture, subalpine meadow, Fewer tags Analysis of sediment retention in western riverine wetlands: the Yampa River watershed, Colorado, USA. We quantified annual sediment deposition, bank erosion, and sediment budgets in nine riverine wetlands that represented a watershed continuum for 1 year in the unregulated Yampa River drainage basin in Colorado. One site was studied for 2 years to compare responses to peak flow variability. Annual mean sediment deposition ranged from 0.01 kg/m(2) along a first-order subalpine stream to 21.8 kg/m(2) at a sixth-order alluvial forest. Annual mean riverbank erosion ranged from 3 kg/m-of-bank at the first-order site to 1000 kg/m at the 6(th)-order site. Total sediment budgets were nearly balanced at six sites, while net export from bank erosion occurred at three sites. Both total sediment deposition (R(2) = 0.86, p <... Categories: Publication; Types: Citation, Journal Citation; Tags: Colorado, Conservation of Natural Resources, Environmental Management, Geologic Sediments, Geologic Sediments: analysis, All tags... Geologic Sediments: chemistry, Models, Rivers, Springer New York, Theoretical, United States, Fewer tags 1 2 3 4 5 ... »