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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Citation (2) Contacts Ecosystems U.S. Geological Survey - ScienceBase Robert K Shriver Kirsten E. Ironside Terry Arundel More... Tag Types Theme (59) Place (3) Tags (with Scheme=none) animal movement (1) bioelectrical impedance analysis (1) bonytail (1) clay concentration (1) climate (1) climate change (1) cougars (1) More... View Results as: JSON ATOM CSV

Laboratory experiment data—turbidity response to increasing silt and clay concentration These data were compiled during a laboratory experiment showing the turbidity response to increasing silt and clay concentration. The sediment used for the laboratory experiment was collected in the Grand Canyon study area, from the bank of the Little Colorado River, approximately 1 kilometer upstream from its confluence with the Colorado River. The sediment was passed through a 63 µm sieve to isolate the silt-and-clay-size fraction. The silt and clay was completely dried in an oven (at 105 degrees Celsius for 12 hours), weighed, mechanically disaggregated, and added in stages to a measured volume of water to calculate concentration. The sediment was kept in suspension with an electric stirrer and turbidity was... Tags: Arizona, Colorado River, Grand Canyon, Information Sciences, Little Colorado River, All tags... Marble Canyon, USGS Science Data Catalog (SDC), Water Quality, Water Resources, clay concentration, false low turbidity, laboratory experiment data, linear response, maximum recording level, maximum response, negative response, silt concentration, turbidity, Fewer tags Bioelectrical impedance analysis for an endangered desert fish—Data These data were used to examine the effectiveness of a non-lethal tool (Bioelectrical Impedance Analysis, "BIA") to estimate the physiological condition of endangered and threatened fishes in the Colorado River Basin. We conducted laboratory trials using hatchery-raised Humpback Chub and Bonytail and wild-captured Roundtail Chub, where fish were subjected to different feeding trials to elucidate a response in physiological condition and different temperature treatments to approximate field conditions. At the end of each 6-week trial fish were removed from tanks, lateral and dorsal measurements of BIA were taken, and fish were sacrificed for proximate composition analysis (lipid, protein, water, ash, dry mass, energy... Types: Citation; Tags: Arizona, Bioelectrical Impedance Analysis, Bonytail, Colorado River Basin, Dorsal measurements, All tags... Fish condition, Flagstaff, Humpback Chub, Laboratory trials, Lateral measurements, Mortality rates, Proximate composition analysis, Roundtail Chub, Temperature correction equations, Threatened and endangered species, USGS Science Data Catalog (SDC), Fewer tags Demographic modeling data (including code) at various sites in the Great Basin, USA These data were compiled to determine whether transient population dynamics substantially alter population growth rates of sagebrush after disturbance, impede resilience and restoration, and in turn drive ecosystem transformation. Data were collected from 2014-2016 on sagebrush population height distributions at 531 sites across the Great Basin that had burned and were subsequently reseeded by the BLM. These data include field data on sagebrush density in 6 size classes and site attributes (seeding year, sampling year, random site designation, elevation, seeding rate). Also included are modeled spring soil moisture data at each site from the year of seeding to sampling. This data release includes associated software... Tags: Botany, California, Ecology, Geography, Great Basin, All tags... Idaho, Information Sciences, Land Use Change, Nevada, Oregon, USGS Science Data Catalog (SDC), Utah, Western United States, Wyoming sagebrush, big sagebrush, biological sampling, biota, demographic rates, demographics, demography, drylands, ecosystem resilience, ecosystem transformation, ecosystems, elevation, field observation, field sampling, random, rangeland ecosystems, restoration, sagebrush, sagebrush counts, sampling year, scrubland ecosystems, seeding, seeding rate, seeding year, shrubland ecosystems, site attributes, terrestrial ecosystems, transect sampling, transient population dynamics, Fewer tags Simulated Soil Water Potential in National Parks and Monuments of the Southern Colorado Plateau, 1915-2099—Data These data were simulated using the SOILWAT model and were intended to characterize soil-water conditions at different ecological sites on the Southern Colorado Plateau. SOILWAT is a daily, site-specific, multi soil-layer, ecosystem water-balance model, driven by daily meteorology, as well as site soil texture and vegetation. The sites simulated correspond with Inventory and Monitoring (I&M) plots established by the National Park Service’s (NPS) Southern Colorado Plateau Network (SCPN), which were established to capture the range of ecosystem conditions present in this network. Plant communities of the Southern Colorado Plateau Network (SCPN) are a vital sign for this region, enhancing habitat, stabilizing soils,... Tags: Arizona, Aztec Ruins National Monument, Bandelier National Monument, Chaco Culture National Monument, Climate, All tags... Climate change, Colorado Plateau, Drought, Future projections, Glen Canyon National Recreation Area, Grand Canyon National Park, Historical trends, Hydrology, Management, Mesa Verde National Park, NDVI, New Mexico, Normalized difference vegetation index, Petrified Forest National Park, Petroglyph National Monument, Plant and soil water relationships, Soil water potential, Soils, Southern Colorado Plateau, Southwest, USGS Science Data Catalog (SDC), Wupatki National Monument, Fewer tags Puma concolor GPS Telemetry and Path Identification Index (2003-2013), Southwest Region, USA Capture, GPS-collar tagging, and release of cougars was conducted in northern Arizona and southern Utah and Nevada, USA, from 2003 to 2013 by the U.S. Geological Survey and the National Park Service (Northern Arizona University IACUC Protocol # 02-082-R4), resulting in GPS-tracking and monitoring of study animal activities. This data set includes six individuals that met three criteria: 1) few missing data (≥ 85% fix success rate), 2) long periods of continuous monitoring, with a minimum of 1000 observations, and 3) established home range with no evidence of dispersal. It includes four females (C04, AS02, P26, and C07) and two males (Z04 and AS07), ranging in age from 1.5 – 4 years in age. Two females (C04 and AS02)... Tags: Arizona, Ecology, GPS, Geography, Grand Canyon National Park, All tags... Information Sciences, Southwestern United States, USA, USA, USGS Science Data Catalog (SDC), United States, Utah, Walnut Canyon National Monument, Wildlife Biology, Zion National Park, animal movement, biota, cougars, environment, global positioning system, mountain lion, movement, path analysis, telemetry, Fewer tags Metabolic-hydraulic model—Data The data contained in this workbook were compiled to investigate the relationship between hydrology of the Colorado River and ecosystem metabolism parameters (i.e., primary production and ecosystem respiration). The workbook contains data exploring the link between Colorado River discharges and water velocity, which are depicted in figure 2 of the associated manuscript. The workbook also contains data pertaining to calibration of the hydraulic model used for modeling discharge and metabolism, and these data are depicted in figure 3 of the manuscript. Also contained are data pertaining to air-water gas exchange rates (k600) that were estimated from the coupled hydraulic model (from figures 4 and 5 of the manuscript).... Types: Citation; Tags: Colorado River, Glen Canyon Dam, Grand Canyon, Lees Ferry, USGS Science Data Catalog (SDC), All tags... ecosystem metabolism, ecosystem respiration, gross primary production, hydropeaking, unsteady flow, Fewer tags