Skip to main content
Advanced Search

Filters: Tags: National CASC (X) > Types: Citation (X) > partyWithName: U.S. Geological Survey - ScienceBase (X)

15 results (61ms)   

View Results as: JSON ATOM CSV
thumbnail
Daily streamflow and reservoir water elevation data for modeled locations in the Red River Basin. Values reported are for 18 different GCM (Global Climate Model) / RCP (Representative Concentration Pathway) / GDM Downscaling scenarios. Climate data from each scenario was input into a Variable Infiltration Capacity (VIC) model, that output flow values. These values were then input into RiverWare, to determine the impacts on regulated flows, lake levels and water availability. RiverWare was used for this project, because of its ability to simulate water use, reservoir operations, and local/interstate regulations.
thumbnail
The Green Wave Hypothesis posits that herbivore migration manifests in response to waves of spring green-up (i.e., green-wave surfing). Nonetheless, empirical support for the Green Wave Hypothesis is mixed, and a framework for understanding variation in surfing is lacking. In a population of migratory mule deer (Odocoileus hemionus), 31% surfed plant phenology in spring as well as a theoretically perfect surfer, and 98% surfed better than random. Green-wave surfing varied among individuals, and was unrelated to age or energetic state. Instead, the greenscape, which we define as the order, rate, and duration of green-up along migratory routes, was the primary factor influencing surfing. Our results indicate that...
thumbnail
Daily streamflow and reservoir water elevation data for modeled locations in the Red River Basin. Values reported are for 18 different GCM (Global Climate Model) / RCP (Representative Concentration Pathway) / GDM Downscaling scenarios. Climate data from each scenario was input into a Variable Infiltration Capacity (VIC) model, that output flow values. These values were then input into RiverWare, to determine the impacts on regulated flows, lake levels and water availability. RiverWare was used for this project, because of its ability to simulate water use, reservoir operations, and local/interstate regulations.
thumbnail
This dataset includes herbaria specimen records that report collection location and date (from 1895 – 2013) for grasses from the Southwest Environmental Information Network (http://swbiodiversity.org/seinet, [accessed 3 March 2014]) 79% of records and Global Biodiversity Information Facility (http://www.gbif.org, [accessed 3 March 2014]) 21% of records for 12 states in the western United States. Associated climate data include monthly mean temperature, maximum temperature, minimum temperature, and precipitation from the herbaria record locations from climate rasters provided by the PRISM Climate Group (http://www.prism.oregonstate.edu, [accessed 1 May 2014]). We derived climate variables expected to be biologically...
thumbnail
Daily streamflow and reservoir water elevation data for modeled locations in the Red River Basin. Values reported are for 18 different GCM (Global Climate Model) / RCP (Representative Concentration Pathway) / GDM Downscaling scenarios. Climate data from each scenario was input into a Variable Infiltration Capacity (VIC) model, that output flow values. These values were then input into RiverWare, to determine the impacts on regulated flows, lake levels and water availability. RiverWare was used for this project, because of its ability to simulate water use, reservoir operations, and local/interstate regulations.
thumbnail
Daily streamflow and reservoir water elevation data for modeled locations in the Red River Basin. Values reported are for 18 different GCM (Global Climate Model) / RCP (Representative Concentration Pathway) / GDM Downscaling scenarios. Climate data from each scenario was input into a Variable Infiltration Capacity (VIC) model, that output flow values. These values were then input into RiverWare, to determine the impacts on regulated flows, lake levels and water availability. RiverWare was used for this project, because of its ability to simulate water use, reservoir operations, and local/interstate regulations.
thumbnail
This dataset includes the cover of perennial grasses in 1989, 1995, 1999, 2005, and 2009 across southern Arizona. Cover was determined using sub-pixel classifications of two Landsat scenes from path 36, row 38 (centered on latitude: 31.7470, longitude: -111.3981) and path 37, row 38 (31.7470, -112.9431) that encompass Tucson, AZ.
thumbnail
Woody plant encroachment and overall declines in perennial vegetation in dryland regions can alter ecosystem properties and indicate land degradation, but the causes of these shifts remain controversial. Determining how changes in the abundance and distribution of grass and woody plants are influenced by conditions that regulate water availability at a regional scale provides a baseline to which compare how management actions alter the composition of these vegetation types at a more local scale and can be used to predict future shifts under climate change. Using a remote sensing-based approach, we assessed the balance between grasses and woody plants and how climate and topo-edaphic conditions affected their abundances...
thumbnail
This dataset includes the cover of leguminous trees (Prosopis velutina, Parkinsonia microphylla, Parkinsonia florida) in 1989, 1995, 1999, 2005, and 2009 across southern Arizona. Cover was determined using sub-pixel classifications of two Landsat scenes from path 36, row 38 (centered on latitude: 31.7470, longitude: -111.3981) and path 37, row 38 (31.7470, -112.9431) that encompass Tucson, AZ.
thumbnail
The Green Wave Hypothesis posits that herbivore migration manifests in response to waves of spring green-up (i.e., green-wave surfing). Nonetheless, empirical support for the Green Wave Hypothesis is mixed, and a framework for understanding variation in surfing is lacking. In a population of migratory mule deer (Odocoileus hemionus), 31% surfed plant phenology in spring as well as a theoretically perfect surfer, and 98% surfed better than random. Green-wave surfing varied among individuals, and was unrelated to age or energetic state. Instead, the greenscape, which we define as the order, rate, and duration of green-up along migratory routes, was the primary factor influencing surfing. Our results indicate that...
thumbnail
The Green Wave Hypothesis posits that herbivore migration manifests in response to waves of spring green-up (i.e., green-wave surfing). Nonetheless, empirical support for the Green Wave Hypothesis is mixed, and a framework for understanding variation in surfing is lacking. In a population of migratory mule deer (Odocoileus hemionus), 31% surfed plant phenology in spring as well as a theoretically perfect surfer, and 98% surfed better than random. Green-wave surfing varied among individuals, and was unrelated to age or energetic state. Instead, the greenscape, which we define as the order, rate, and duration of green-up along migratory routes, was the primary factor influencing surfing. Our results indicate that...
thumbnail
The Green Wave Hypothesis posits that herbivore migration manifests in response to waves of spring green-up (i.e., green-wave surfing). Nonetheless, empirical support for the Green Wave Hypothesis is mixed, and a framework for understanding variation in surfing is lacking. In a population of migratory mule deer (Odocoileus hemionus), 31% surfed plant phenology in spring as well as a theoretically perfect surfer, and 98% surfed better than random. Green-wave surfing varied among individuals, and was unrelated to age or energetic state. Instead, the greenscape, which we define as the order, rate, and duration of green-up along migratory routes, was the primary factor influencing surfing. Our results indicate that...
thumbnail
Nutritional ecology forms the interface between environmental variability and large herbivore behaviour, life history characteristics, and population dynamics. Forage conditions in arid and semi-arid regions are driven by unpredictable spatial and temporal patterns in rainfall. Diet selection by herbivores should be directed towards overcoming the most pressing nutritional limitation (i.e. energy, protein [nitrogen, N], moisture) within the constraints imposed by temporal and spatial variability in forage conditions. We investigated the influence of precipitation-induced shifts in forage nutritional quality and subsequent large herbivore responses across widely varying precipitation conditions in an arid environment....
thumbnail
This data set characterizes the thermal regime in a number of Colorado and New Mexico streams that contain populations of Rio Grande Cutthroat Trout (Oncorhynchus clarkii virginalis) or have been considered potential restoration areas for the fish. The majority of these streams had no previous record of continual temperature records. When compared to Colorado water temperature criteria (Cold Tier 1), a portion of these populations appeared to be at risk from elevated stream temperatures, as indicated by exceedance of both acute and chronic water quality metrics. Summer water temperature profiles recorded at sites within current Rio Grande Cutthroat Trout habitat indicated that although the majority of currently...
thumbnail
This dataset includes the cover of creosote bush (Larrea tridentata)in 1989, 1995, 1999, 2005, and 2009 across southern Arizona. Cover was determined using sub-pixel classifications of two Landsat scenes from path 36, row 38 (centered on latitude: 31.7470, longitude: -111.3981) and path 37, row 38 (31.7470, -112.9431) that encompass Tucson, AZ.


    map background search result map search result map Water and Air Temperature Throughout the Range of Rio Grande Cutthroat Trout in Colorado and New Mexico; 2010-2015 V2 Data for Decadal shifts in grass and woody plant cover are driven by prolonged drying and modified by topo-edaphic properties Shifts in Perennial grass in southern Arizona, 1989 - 2009 Shifts in Creosote bush in southern Arizona, 1989 - 2009 Shifts in Leguminous tree in southern Arizona, 1989 - 2009 RiverWare Daily Simulated values of Streamflow from 2006-2099: Arkansas RiverWare Daily Simulated values of Streamflow from 2006-2099: Louisiana RiverWare Daily Simulated values of Streamflow from 2006-2099: Oklahoma RiverWare Daily Simulated values of Streamflow from 2006-2099: Texas Data for Climate drives shifts in grass reproductive phenology across the western U.S. (1895-2013) The greenscape shapes surfing of resource waves in a large migratory herbivore Extreme precipitation variability, forage quality and large herbivore diet selection in arid environments Daily Surfing Individual Variability in Surfing Migration Dates Extreme precipitation variability, forage quality and large herbivore diet selection in arid environments The greenscape shapes surfing of resource waves in a large migratory herbivore Daily Surfing Individual Variability in Surfing Migration Dates Data for Decadal shifts in grass and woody plant cover are driven by prolonged drying and modified by topo-edaphic properties Shifts in Perennial grass in southern Arizona, 1989 - 2009 Shifts in Creosote bush in southern Arizona, 1989 - 2009 Shifts in Leguminous tree in southern Arizona, 1989 - 2009 RiverWare Daily Simulated values of Streamflow from 2006-2099: Arkansas RiverWare Daily Simulated values of Streamflow from 2006-2099: Louisiana RiverWare Daily Simulated values of Streamflow from 2006-2099: Oklahoma RiverWare Daily Simulated values of Streamflow from 2006-2099: Texas Water and Air Temperature Throughout the Range of Rio Grande Cutthroat Trout in Colorado and New Mexico; 2010-2015 V2 Data for Climate drives shifts in grass reproductive phenology across the western U.S. (1895-2013)