Thesis (M.S.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 98-108). Also available on the World Wide Web.

xiv, 227 p. : ill. (some col.) A print copy of this title is available through the UO Libraries under the call numbers: KNIGHT QE720.2.K53 B75 2008 / The Holocene vegetation and fire history of the Klamath Mountains (KM), northern California, was reconstructed at three sites based on an analysis of pollen and high-resolution macroscopic charcoal in lake-sediment cores. These data were compared with five existing records to examine regional patterns. The objective was to determine the relative importance of climate history, substrate, and disturbance regime on the development of the Klamath vegetation. In the first study, two middle-elevation sites were compared along a moisture gradient in the northern KM. The pollen data indicated a similar vegetation history, beginning with subalpine parkland in the late-glacial period, and changing to open forest in the early Holocene and closed forest in the late Holocene. However, the timing of these changes differed between sites and is attributed to the relative importance of coastal influences and topography. The second study examined the effect of substrate and nutrient limitations on the vegetation history. The pollen data suggest that ultramafic substrates (UMS), containing heavy metals and low nutrients that limit plant growth, supported drier plant communities than those on non-ultramafic substrates (NUMS) for any given period. For example, between 14,000 and 11,000 cal yr BP, cooler and wetter conditions than present led to the establishment of a subalpine parkland of Pinus monticola and/or Pinus lambertina, Tsuga, Picea on non-ultramafic substrates (NUMS). On UMS, an open Pinus jeffreyi and/or Pinus contorta woodland developed. In the early Holocene, when conditions were warmer and drier than present, open forests of Pinus monticola/lambertina , Cupressaceae, Quercus and/or Amelanchier grew on NUMS, whereas open forest consisting of Pinus Jeffreyi/contorta , Cupressaceac and Quercus developed on UMS. In the late Holocene, cool wet conditions favored closed forests of Abies, Pseudotsuga , and Tsuga on NUMS, whereas Pinus jeffreyi/contorta , Cupressaceae and Quercus forest persisted with little change on UMS. The charcoal data indicate that past fire activity was similar at all sites, implying a strong climatic control. The results of both studies suggest that the influence of Holocene climate variations, disturbance regime, and substrate type have helped create the current mosaic of vegetation in the KM. / Adviser: Cathy Whitlock, Patrick Bartlein

abstract: Natural resources management is a pressing issue for Native American nations and communities. More than ever before, tribal officials sit at the decision-making tables with federal and state officials as well as non-governmental natural resource stakeholders. This, however, has not always been the case. This dissertation focuses on tribal activism to demonstrate how and why tribal sovereignty, self-determination, and treaty rights protection are tied closely to contemporary environmental issues and natural resources management. With the Klamath Tribes of southern Oregon as a case study, this dissertation analyzes how a tribal nation garnered a political position in which it could both indirectly influence and directly orchestrate natural resource management within and outside of its sovereign boundaries. The Klamath Tribes experienced the devastating termination policy in the 1950s. Termination stripped them of their federal status as an Indian tribe, the government services offered to recognized tribes, and their 1.2-million-acre reservation. Despite this horrific event, the Klamaths emerged by the 2000s as leading natural resource stakeholders in the Klamath River Watershed, a region ten times larger than their former reservation. The Klamaths used tools, such as their treaty and water rights, and employed careful political, legal, and social tactics. For example, they litigated, appropriated science, participated in democratic national environmental policy processes, and developed a lexicon. They also negotiated and established alliances with non-governmental stakeholders in order to refocus watershed management toward a holistic approach that promoted ecological restoration. This study applies spatial theory and an ethnohistorical approach to show how traditional values drove the Klamaths’ contemporary activism. From their perspective, healing the land would heal the people. The Klamaths’ history illuminates the active roles that tribes have had in the institutionalization of the federal self-determination policy as federal agencies resisted recognizing tribes and working with them in government-to-government relationships. Through their efforts to weave their interests into natural resource management with state, federal, and non-governmental stakeholders, the Klamaths took part in a much larger historical trend, the increased pluralization of American society. / Dissertation/Thesis / Doctoral Dissertation History 2015

Aquatic ecosystems continue to be increasingly affected by climate warming. For salmonids in the Pacific Northwest of North America, increasing temperatures pose tighter thermal constraints on their habitat use as well as aspects of their individual performance, such as disease resistance. This thesis examines the effect of temperature on the phenology of the Ceratomyxa shasta life cycle, the effect of thermal refugia on disease risk in juvenile salmonids in the Klamath River, CA, and the spatial and temporal distribution of C. shasta in the Willamette River, OR. We developed a biological model that predicts an acceleration of the C. shasta life cycle development due to climate shifts in the Klamath River, resulting in more generations per year and earlier seasonal parasite occurrence. We showed that in early summer the Beaver Creek-Klamath River confluence provides juvenile Chinook and coho salmon an area of lower parasite doses and cooler temperatures than the main stem, thus lessening disease risk. By accelerating the development of C. shasta in its hosts, increasing temperatures will result in earlier parasite transmission to juvenile salmonids and a longer season of infectivity. These fish may find disease refuge at cold tributary inflows to the main stem of the Klamath River in early summer, further adding to the benefit of these important thermal habitats. To determine if similar disease patterns occur in other rivers with the parasite, we described spatial and temporal occurrence of C. shasta in the Willamette River. By collecting weekly water sampling at four sites over 28 months we characterize seasonal and annual differences of parasite abundance, which varies with weekly temperature. We also collected samples along the length of the main stem and its tributaries and identified spatial differences in C. shasta spore densities. Identification of spatial and temporal variation of C. shasta in the Willamette River provides a foundation for understanding future patterns of disease occurrence in this river where conservation of anadromous fisheries is also of concern. This thesis identifies likely responses of C. shasta to climate warming in the Klamath River, with useful application to other rivers in the Pacific Northwest. / Graduation date: 2013

A declining population of ring-necked pheasants (Phasianus colchicus) was studied at Tule Lake National Wildlife Refuge (TLNWR) from the summer of 1990 through the spring of 1993. Pheasant densities/50 ha at TLNWR in 1989, 1991, and 1992 were considerably lower (16.86, 8.49, and 6.81) than the >62 density seen in the mid-1950s. Mean body weight of hen pheasants at TLNWR was significantly lower than hens at nearby Lower Klamath National Wildlife Refuge (LKNWR) which was not intensively farmed. Mean tarsal lengths of hens at TLNWR were also significantly shorter than hens at LKNWR, suggesting reduced skeletal growth and potential nutritional problems. The lack of adequate cover was responsible for poor early nest success at TLNWR. Later in the season, spring planted crops provided adequate cover to conceal nesting hens; however, only 0.21 young in 1991 and 0.02 young in 1992 were produced per radio-equipped hen. These rates are extremely low compared to rates required to maintain a stable population. Most adult mortality occurred during the spring and early summer months at TLNWR before crops provided adequate cover, and long before pesticide applications. The main predator of the pheasants was the golden eagle (Aquila chrvsaetos). Of special concern at TLNWR was pheasant and other wildlife exposure to anticholinesterase (antiChE) insecticides used on agricultural croplands at the refuge. Direct toxicity of antiChE compounds (in this case methamidophos) killed 2 young pheasants, but no adult radio-equipped hens died as a direct result of insecticide intoxication. This finding was of particular interest because 15% of the adult pheasants collected in and around potato fields had 55% brain ChE inhibition. The extent of the effects of insecticide exposure on the survivorship of pheasant young was uncertain as they were not radio-equipped. The overriding factor impacting the pheasant population at TLNWR and to a lesser extent LKNWR was poor habitat, especially in the spring when most mortality occurred. The poor habitat also resulted in extremely low recruitment (up to 1 September). Nearly all adult mortality and most of the low recruitment occurred before the insecticide spray season. The population was nearly extirpated during the severe winter of 1992-93. / Graduation date: 1995

This thesis examines how the pursuit of commercial gain affected the development of agriculture in western Oregon's Willamette, Umpqua, and Rogue River Valleys. The period of study begins when the British owned Hudson's Bay Company began to farm land in and around Fort Vancouver in 1825, and ends in 1861--during the time when agrarian settlement was beginning to expand east of the Cascade Mountains. Given that agriculture in Oregon, as elsewhere, would eventually reach a standard of national development, and given that most of Oregon's immigrants arrived poor and lacked the farm implements needed for subsistence, the question this study asks is what methods and motivations guided Oregon's first agrarian settlers to improve their industry? It is the central premise of this study that commerce was the sine qua non of agricultural development, and that commercial gain was the incentive that underpinned the improvements necessary to its progress. The question itself necessarily involves physiographical and climatological conditions, existing and potential markets, and a merchant class whose commercial motivations were beyond doubt. Two additional matters that weigh substantially through most of this paper need to be mentioned: First, because not all farmers were commercially-oriented, the focus is on individuals, including merchants, whose entrepreneurial activities contributed the most to agriculture; second, the discovery of gold in California in 1848, and in southern Oregon in the early 1850s, had a huge and lasting influence on Oregon agriculture and on the overall economy.

The uses and management of water resources play an important role in the development of a culture and the health of its environment and population. Humans throughout history have consistently exploited rivers, which degrades water quality and leads to water scarcity. This thesis is an examination of two river restoration projects, one on the Oder River in Germany and the other on the Klamath River in the United States, that represent each country's efforts to reverse river exploitation. These cases in Germany and the United States demonstrate the importance of achieving a better understanding of the political instruments and strategies for mitigating environmental issues on a global scale.

Indiana University-Purdue University Indianapolis (IUPUI) / The Antler and Sonoma orogenies occurred along the southwest-trending passive Pacific margin of North America during the Paleozoic concluding with the accretion of the McCloud Arc. A southeast-trending sinistral transform fault truncated the continental margin in the Permian, becoming a locus for initiation of an east-dipping subduction zone creating the Sierran magmatic arc. Constrained in age between two early Triassic tuff layers, the volcanic clasts in the breccia of Frog Lakes represent one of the earliest records of mafic magmatism in the eastern Sierra Nevada. Tholeiitic rock clasts found in the breccia of Frog Lakes in the Saddlebag Lake pendant in the east central Sierra Nevada range in composition from 48% to 63% SiO2. Boninites produced by early volcanism of subduction initiation by spontaneous nucleation at the Izu-Bonin-Mariana arc are more depleted in trace element concentrations than the clasts while andesites from the northern volcanic zone of the Andes produced on crust 50 km thick have similar levels of enrichment and provide a better geochemical modern analogue. Textural analysis of the breccia of Frog Lakes suggest a subaqueous environment of deposition from a mature magmatic arc built on continental crust > 50 km thick during the Triassic. The monzodiorites of Saddlebag and Odell Lakes are temporal intrusive equivalents of the breccia of Frog Lakes and zircon geochemistry indicates a magmatic arc petrogenesis.