The study was undertaken to learn the life history of Sceloporus occidentalis longipes and its environmental adaptations on a high plateau (Rainier Mesa) with an elevation of 2,286 meters, at the Atomic Energy Commission's Nevada Test Site in Nye County, Nevada. The lizards emerge from hibernation in April with the males preceeding the females by a period of one to two weeks or more. Mating occurs in late April, May, and perhaps early June. Eggs are laid between 10 June and 15 July. Clutches of 9 to 15 eggs are laid with the younger females usually laying 9 eggs. No eggs were found in the field.

Freshwater ecosystems are subject to a wide variety of stressors, which can have complex interactions and result in ecological surprises. Non-native fish introductions have drastically reduced the number of naturally fishless lakes and have resulted in cascading food web repercussions in aquatic and terrestrial habitats. Additional anthropogenic influences that result from increases in global airborne emissions also threaten wildlife habitat. Atmospheric nitrogen deposition has been recognized as an anthropogenic contributor to acidification and eutrophication of wilderness ecosystems. Planktonic communities have shown declines in response to predation and shifts in composition as a result of nutrient inputs and acidification, both of which are potential fates of nitrogen deposition. This study identified the response of zooplankton communities from two lakes (fish present vs. absent) in Mount Rainier National Park to manipulations simulating an episodic disturbance event in mesocosms. The experiment used a 2 x 2 factorial design with acid and nitrogen treatments. Treatments resulted in significantly elevated nitrogen and decreased pH conditions from control mesocosms over 42 days, indicating that the treatment effects were achieved. Results indicate that zooplankton communities from lakes with different food web structure respond differently to the singular effects of acid and nitrogen addition. Surprisingly, the interaction of the two stressors was related to increases in community metrics (e.g., abundance, biomass, body size, richness, and Shannon-Weiner diversity) for both lake types. This work can aid management decisions as agencies look to restore more aquatic montane habitats to their historic fishless states, and assess their abilities to recover and afford resistance to atmospheric pollution.

Regional paleoclimatic proxies and current local climate variables and were analyzed to reconstruct paleoglaciers in an effort to assess glacier change On Mount Rainier. Despite the dry and generally warm conditions (sea surface temperatures (SST) -0.15°C to +1.8°C relative to current temperatures), the previously documented McNeeley II advance (10,900 - 9,950 cal yr B.P.) was likely produced by air temperature fluctuations. The average SST record and the terrestrial climate proxies show cooling temperatures with continued dryness between McNeeley II and the Burroughs Mountain advance (3,442 - 2,153 cal yr B.P.). The paleoclimate during the Burroughs Mountain advance was both cool and warm (SST temperatures -0.55°C to +0.5°C) and was the wettest of the Holocene. A combination of statistical and deterministic equilibrium line altitude (ELA) models was used to produce Holocene ELAs between 1,735 -2,980 m. Glacial advances were predicted 10,990, 10,170, 9,260, 8,200, 6,490, 3,450 and 550 - 160 cal yr. B.P. Two glacier flow models were produced simultaneously to constrain glacial extent through the Holocene. Model I is based on current mass balance parameters and produced lengths for the Nisqually and Emmons glaciers 3.7 - 14.2 km and 4.2 - 17.1 km respectively. Glaciated area ranged from 26 to 327 km2. Model 2 is tuned to the Garda advance and produced lengths 2.6-10.6 km and 2.3-13.9 km. Glaciated area ranged from 11 to 303 km2. The first two advances were similar in elevation and GIS-modeled extent to McNeely II moraines. The following three advances were not detected in the geologic record. The 3,450 cal yr. B.P. advance was the largest of the late-Holocene (ELA 1,800 - 1,817 m) and was ~200 m lower than the geologic record. The ELAs of the Garda advance were modeled (1,944 - 1,983 m) and are similar to previous reconstructions. North-south spatial variations in glacial extent increase during periods of recession as the southern glaciers receive more ablation than northern glaciers. Early humans could have accessed the alpine environments as high as 1,730-2,980 m. The early Holocene glacial extent allowed the highest (2,980 m) 11,150 cal yr. B.P. and lowest (1,730 m) 10,990 cal yr. B.P. alpine access. Glacial retreat (2,727 m 10,400 cal yr. B.P.) was followed by an advance (1,929 m 10,170 cal yr. B.P.) and another retreat (2,951 m 10,050 cal yr. B.P.). Ice gradually descended and limited access to 1,820 m 6,490 cal yr. B.P. Glacial extents remained largely unchanged until the historic era when paleohumans would have had access to alpine environments at 2,000 m.

Thesis (MMus (Music))--University of Stellenbosch, 2009. / Priaulx Rainier (1903-1986) was a South-African born composer whose highly original compositional style attracted great attention during her lifetime. She spent most of her life in England, but was inspired by the images and recollections of her youth in Africa. Despite the critical acclaim she received, little research has been done about her, both in South Africa and abroad. Additionally, the nature of existing sources is mostly not analytical, but rather provides an overview of her life or general aspects of her style. Although some conclusions have been drawn about her compositional style, they are not thoroughly substantiated by concrete analytical evidence. Also, the focus is mostly on her prominent rhythmic use (often linked by authors to the “African” element of her idiom), with an evident disregard of the other aspects of style, most notably with regard to pitch coherence. This research attempts to correct this unbalanced discourse by analysing one of her few solo piano works, the Barbaric Dance Suite (composed in 1949), and pointing out significant pitch relations, similarities and contrasts. The rationale for selecting this specific work originated from Rainier’s own pronouncement that “The Suite is a key to all my later music, for in the three DANCES, their structural embryo is, on a small scale, the basis for most of the later works.” Although the scope of the research did not allow for a comparative analysis, it is strongly believed that the conclusions reached in this study could also be applicable to many of Rainier’s other works, especially of the early period. The study consists of an introduction in which the Barbaric Dance Suite is contextualised, followed by the main body of the thesis that consists of a detailed analysis of each of the three movements. The foremost method of analysis used is set theory analysis, which could be briefly described as a method whereby (particularly atonal) music is segmented and categorised in pitch class sets. As set theory focuses exclusively on the dimension of pitch, traditional methods of analysis are employed to examine the other musical parameters. In the conclusion, the analytical results are contextualised with regard to existing pronouncements on Rainier’s oeuvre. The study also comments on the applicability of set theory as analytical system in Rainier’s music. The many complex pitch relations that were discovered by the intensive analysis of pitch content has given enough evidence to conclude that Rainier’s use of sonorities has been unjustly neglected in the discourse of this work and perhaps also in her musical style as a whole. It is hoped that further detailed analysis of her use of sonorities in other works could lead authorities to revise the insistent pronouncements on her rhythmic use in favour of a more balanced assessment of all aspects of her compositional style.

Thesis (Ph. D.)--University of Washington, 2000. / Vita. Includes bibliographical references (leaves 266-280).