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Articles 1 - 8 of 8
Full-Text Articles in Earth Sciences
Habitat Use And Diet Analysis Of Breeding Common Barn-Owls In Western Nebraska, Joseph A. Gubanyi M.S.
Habitat Use And Diet Analysis Of Breeding Common Barn-Owls In Western Nebraska, Joseph A. Gubanyi M.S.
School of Natural Resources: Dissertations, Theses, and Student Research
I studied barn owl (Tyto alba) breeding biology in western Nebraska 1984-1986. I had greatest success capturing males (56% success) at night using trap doors at nest sites and females (91 % success) using hoop nets at nest sites during the day. Barn owls removed 16 of 23 tail-mounted radios. Eight birds were radio-tracked for 7-14.5 hours. The mean foraging range was 198 ha (32- 299 ha, n = 8) with < 1 % overlap among birds from adjacent nest sites. Field-tested telemetry error was high (mean displacements of radio-locations for 2 birds were 208 and 241 m). I found no relationship between percent cover in foraging habitat and reproductive success. I identified 10,140 prey items from 15 nest sites and found both annual and seasonal variation in barn owl diets. Microtus ochrogaster occurred most frequently (32.7%) and increased in the diet from 17.6 to 27.2 to 43.5% 1984-1986. M. ochrogaster and Perognathus hispidus annual frequencies were …
Mule Deer Diets On A Chained And Seeded Central Utah Pinyon-Juniper Range, United States Department Of Agriculture, Forest Service
Mule Deer Diets On A Chained And Seeded Central Utah Pinyon-Juniper Range, United States Department Of Agriculture, Forest Service
Forestry
Study of the seasonal use by mule deer of some native and introduced species on a pinyon-juniper restoration project showed that woody species made up the bulk of pellet samples, followed by forbs and grasses. Land managers are advised on seeding and grazing practices for enhancing big game habitats.
Mtclim: A Mountain Microclimate Simulation Model, United States Department Of Agriculture, Forest Service
Mtclim: A Mountain Microclimate Simulation Model, United States Department Of Agriculture, Forest Service
Forestry
A model for calculating daily microclimate conditions in mountainous terrain is presented. Daily air temperature, shortwave radiation, relative humidity, and precipitation are extrapolated from data measured at National Weather Service stations. The model equations are given and the paper describes how to execute the model. Model outputs are compared with observed date from several mountain sites.
Native Species Establishment On An Oil Drill Pad Site In The Uintah Mountains, Utah: Effects Of Introduced Grass Density And Fertilizer, United States Department Of Agriculture, Forest Service
Native Species Establishment On An Oil Drill Pad Site In The Uintah Mountains, Utah: Effects Of Introduced Grass Density And Fertilizer, United States Department Of Agriculture, Forest Service
Habitat Ecology
This study examined the effects of introduced grass seeding density and fertilizer on native species establishment on an oil drill pad site in the Uintah Mountains, UT. Differences in first-year seedling density and 3-year standing crop biomass among treatments were evaluated for seeded introduced grasses and native species and for unseeded colonizers. Aerial cover was measured all 3 years and the effects of fertilization on soil NO3-N, available P, and exchangeable K were examined 2 years after application. Recommendations for reclamation of similar sites are given.
Flood Insurance Study, City Of Tooele, Utah, Tooele County, Federal Emergency Management Agency
Flood Insurance Study, City Of Tooele, Utah, Tooele County, Federal Emergency Management Agency
All U.S. Government Documents (Utah Regional Depository)
This Flood Insurance Study investigates the existence and severity of flood hazards in the City of Tooele, Tooele County, Utah, and aids in the administration of the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. This study will be used to establish actuarial flood insurance rates and assist the community in its efforts to promote sound flood plain management. Minimum flood plain management requirements for participation in the National Flood Insurance Program (NFIP) are set forth in the Code of Federal Regulations at 44 CFR, 60.3.
Flood Insurance Study, Weber County, Utah, Unincorporated Areas, Federal Emergency Management Agency
Flood Insurance Study, Weber County, Utah, Unincorporated Areas, Federal Emergency Management Agency
All U.S. Government Documents (Utah Regional Depository)
This Flood Insurance Study investigates the existence and severity of flood hazards in the unincorporated areas of Weber County, Utah, and aids in the administration of the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. This study will be used to convert Weber County to the regular program of flood insurance by the Federal Emergency Management Agency. Local and regional planners will use this study in their efforts to promote sound flood plain management.
Effects Of Prescribed Fire On Biomass And Plant Succession In Western Aspen, United States Department Of Agriculture, Forest Service
Effects Of Prescribed Fire On Biomass And Plant Succession In Western Aspen, United States Department Of Agriculture, Forest Service
Forestry
Biomass of grasses, forbs, shrubs, and aspen suckers was determined annually for three prescribed fires in aspen and aspen-conifer forests in southeastern Idaho and western Wyoming. Fires ranged from low to high severity and overstory mortality from 20 to 100 percent. Over 4 postburn years, production of grasses and forbs averaged 1.5 to 3.3 times that of controls. After 5 years, shrub biomass was 21 to 100 percent of preburn biomass. The varied patterns of seral vegetation and their management implications are discussed.
The Uranium-Trend Dating Method: Principles And Application For Southern California Marine Terrace Deposits, Daniel R. Muhs, John N. Rosholt, Charles L. Bush
The Uranium-Trend Dating Method: Principles And Application For Southern California Marine Terrace Deposits, Daniel R. Muhs, John N. Rosholt, Charles L. Bush
United States Geological Survey: Staff Publications
Uranium-trend dating is an open-system method for age estimation of Quaternary sediments, using disequilibrium in the 238U–234U–230Th decay series. The technique has been applied to alluvium, colluvium, loess, till, and marine sediments, in this study we tested the U-trend dating method on calcareous marine terrace deposits from the Palos Verdes Hills and San Nicolas Island, California. Independent age estimates indicate that terraces in these areas range from –80 ka to greater than 1.0 Ma. Two low terraces on San Nicolas Island yielded U-trend plots that have a clustered array of points and the ages of …