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81	Minor Alkaline Earth Element and Alkali Metal Behavior in Closed-Basin Lakes Witherow, Rebecca A. 28 September 2009 (has links) No description available. Biogeochemistry Earth Environmental Science Geochemistry Geology Antarctica McMurdo Dry Valleys Great Basin lithium isotopes alkali metals alkaline earths terminal lakes geochemical evolution saline lakes strontium rubidium barium
82	Before winter comes : Archaeological investigations of settlement and subsistence in Harney Valley, Harney County, Oregon / Archaeological investigations of settlement and subsistence in Harney Valley, Harney County, Oregon O'Grady, Patrick Warren, 1959- 12 1900 (has links) xxi, 541 p. : ill. (some col.), maps. A print copy of this title is available through the UO Libraries under the call number: KNIGHT E78.O6 O37 2006 / Many archaeological researchers that have conducted investigations in the Harney Valley of southeastern Oregon use the ethnographic description of the seasonal round of the Harney Valley Paiute reported by Beatrice Blyth Whiting in her 1950 work Paiute Sorcery as a framework for discussions of prehistoric human use of the area. Archaeological investigations of seven sites, situated in areas identified as having been utilized by the Harvey Valley Paiutes, were conducted to test the relationship between Whiting's ethnographic account and the archaeological record. Data recovery excavations occurred at the Hoyt (35HA2422), Morgan (35HA2423) and Hines (35HA2692) sites near Burns, and test excavations occurred at the Knoll (35HA2530) site in the Silvies Valley, the RJ site (35HA3013) in the Stinkingwater Mountains, and the Broken Arrow (35HA2735) and Laurie's (35HA2734) sites near Malheur Lake. Studies of the cultural materials recovered during the excavations were undertaken to evaluate the content and complexity of each site. Analyses included typological considerations of the chipped stone tools, ground stone, bone tools, and shell, bone, and stone beads. Radiocarbon dating, obsidian sourcing and hydration, and zooarchaeological and paleobotanical analyses were also conducted when possible. Based on the results of the analyses, the seven sites reported herein were primarily used during the past 2000 years, with periods of less intensive use extending beyond 4000 BP. The results of the archaeological investigations indicate that there is a strong correlation between the late Holocene prehistoric record and Whiting's ethnographic description. However, the relationship between human use of the centrally-located lakes and wetlands and the neighboring uplands is clearly more complex than the ethnographic record suggests. Patterns of settlement and mobility revealed through the archaeological record indicate that central places, located closer to wetlands and lacustrine settings but within relatively easy reach of the uplands, may have figured more prominently in the behavior of prehistoric populations than the seasonal round as described by Whiting. Future research will benefit from explorations of central place foraging, emphasizing the role of behavioral ecology in the placement of sites and patterns of site use within the Harney Valley and the northern Great Basin at large. / Committee in Charge: Dr. C. Melvin Aikens, Chair; Dr. Dennis L. Jenkins; Dr. Douglas J. Kennett; Dr. Esther Jacobson-Tepfer Settlement Subsistence Harney Valley (Or.) -- Antiquities Harney County (Or.) -- Antiquities Oregon -- Antiquities Late Holocene Obsidian sourcing Great Basin Harney County (Or.) -- Antiquities
83	Holocene Climate and Environmental Change in the Great Basin of the Western United States: A Paleolimnological Approach Reinemann, Scott A. 29 August 2013 (has links) No description available. Atmospheric Sciences Geography Physical Geography Paleoclimate Science Paleoecology Lake Sediment Mercury Spheroidal Carbonaceous Particles Deposition Nevada, Great Basin, Subalpine Medieval Climate Anomaly Little Ice Age paleoclimate chironomids midges temperature
84	Does Shape Predict Performance? An Analysis of Morphology and Swimming Performance in Great Basin Fishes Aedo, John R. 08 December 2008 (has links) (PDF) Swimming performance strongly influences fitness in aquatic organisms and is closely tied to external body morphology. Although this connection has been closely examined at the individual and species level, few studies have focused on this relationship as it pertains to functional group assemblages. Using functional groups based on similarities in habitat use and morphology, I tested the hypothesis that swimming performance can be reliably predicted by functional group composition. I measured swimming performance as burst speed using a simulated predator attack and as prolonged speed using a step-endurance test in a laboratory flume. I measured morphology using geometric morphometric techniques. A difference in swimming behavior in four of the seven species was observed in the step-endurance test. Benthic species exhibited bracing behavior as an alternative to body-caudal fin (BCF) propulsion in the prolonged speed trials. Swimming performance exhibited a weak relationship with functional groups based on habitat or morphology. Rather a species-based model was the best predictor of swimming performance. Although species exhibited variation in swimming performance, body size was the strongest predictor of absolute swimming performance across all models. Relative swimming performance (measured in body lengths/sec) was negatively related to body size. The results of this study suggest that functional groups are not always reliable predictors of performance and they necessitate empirical testing to validate their effectiveness. This study also provides critical swimming performance data for previously unstudied Great Basin fishes which could be valuable for predicting fish passage through culverts, weirs and fish ladders. Swimming performance burst speed prolonged speed fish passage culverts allometric effects Great Basin brown trout mountain sucker cutthroat trout leatherside chub least chub longnose dance speckled dace mottled sculpin June sucker redside shiner Biology
85	Plant Establishment and Soil Microenvironments in Utah Juniper Masticated Woodlands Young, Kert R. 05 July 2012 (has links) (PDF) Juniper (Juniperus spp.) encroachment into sagebrush (Artemisia spp.) and bunchgrass communities has reduced understory plant cover and allowed juniper trees to dominate millions of hectares of semiarid rangelands. Trees are mechanically masticated or shredded to decrease wildfire potential and increase desirable understory plant cover. When trees are masticated after a major increase in tree population density and associated decrease in perennial understory cover, there is a risk that invasive annual grasses will dominate because they are highly responsive to the increased resource availability that commonly follows removal of the main resource user. To determine if tree mastication increases resource availability and subsequently favors invasive annual or perennial grasses, we compared soil temperature, water, and nutrient microenvironmental conditions and seedling establishment and growth. We used the major rangeland weed, cheatgrass (Bromus tectorum L.), to represent invasive annual grasses and Anatone bluebunch wheatgrass (Pseudoroegneria spicata (Pursh) A. Löve), a natural accession of native bluebunch wheatgrass, to represent the perennial grasses of the sagebrush-bunchgrass plant community. These comparisons were made between and within paired-adjacent masticated and untreated areas at three locations in Utah dominated by Utah juniper (Juniperus osteosperma (Torr.) Little). Juniper tree mastication generally increased resource availability with masticated areas having greater soil temperature, soil water availability, and soil N supply rates than untreated areas. Prior to juniper tree mastication litter mounds were not found to be resource islands probably because juniper trees themselves were using subcanopy soil water and nutrients. After juniper tree mastication and elimination of these predominant resource users, litter mounds served as resource islands with greater soil water availability and N supply rates than bare interspaces during the critical time for seedling establishment in spring. Plant growth followed in line with greater resource availability after tree mastication with masticated areas having more productive although fewer invasive-annual and perennial grass seedlings than untreated areas. These results suggest that increases in resource availability and warmer spring temperatures associated with mastication will not necessarily favor invasive annual over perennial grass seedling establishment. Resilience of the sagebrush-bunchgrass community to return to dominance after juniper control will likely be greatly influenced by how much of the sagebrush-bunchgrass community remains following tree control and the intensity of propagule pressure by invasive species. If only invasive annuals remain when the trees are treated then invasive annuals would be expected to dominate the post-treatment plant community especially with their ability to establish inside litter mounds unless they were also controlled and perennial grasses planted at the time of treatment. Anatone bluebunch wheatgrass carbon cheatgrass degree days fertilizer Great Basin mulch nitrogen PRSâ„¢ rangeland restoration sagebrush steppe SageSTEP seedling establishment shred wet days wet degree days woodland woody debris Animal Sciences
86	Ghost Water Exhibition Sharp, Michael G. 01 March 2017 (has links) The Ghost Water exhibition of artworks by Michael Sharp was comprised of four main works titled: 30 x 60 Minute Grid Series, Suspension, History/Prehistory, and Lake Bonneville Remnants. The artwork was created as a reaction to the land that once held the prehistoric Lake Bonneville and to its current remnant Great Salt Lake. The work explores the dialogue between absence and presence. Great Salt Lake Lake Bonneville Red Rock Pass Stockton Bar Old River Bed Steep Mountain Long Divide The Threshold Utah the West Great Basin Bear River Weber River Jordan River desert salt asphalt water railroad glass book arts artist books installation archive collection kallitype collotype photography printmaking letterpress ghost climate change Geology time pigment Land Art Erdlebenbildkunst panorama ink identity place grid cartography Art Practice
87	Evaluating Near Surface Lapse Rates Over Complex Terrain Using an Embedded Micro-Logger Sensor Network in Great Basin National Park Patrick, Nathan A. 03 October 2014 (has links) No description available. Atmospheric Sciences Geography Geophysical Hydrologic Sciences Hydrology Meteorology Physical Geography Water Resource Management Environmental Science Lapse Rates Great Basin Micro-Logger Micro Logger lascar Specific Humidity Surface Temperatures Complex Terrain mountain geography National Park Hydrology Dry Adiabatic Saturated Adiabatic Environmental Lapse Rate Free Air Calibration

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