No description available.

The National Park Service initiated a backcountry campsite restoration project in 1987 to restore native vegetation on severely degraded campsites in three subalpine lake basins in Yosemite National Park. Restoration treatments included soil scarification, transplanting, manual seeding and site protection. Eight of the treated campsites were monitored in 1990 to evaluate changes in percent vegetation cover, species richness and volunteer establishment that had occurred over the three year period beginning prior to treatment application in the summer of 1987, and ending in the summer of 1990. Percent vegetation cover increased slightly across all sampled quadrats ([mean] = 0.71; N = 214) with mean percent cover changes ranging from -0.37 to 4.36 on individual campsites. Three sites had a loss of cover. Percent cover changes differed most among campsites within lake basins. Changes in percent cover did not differ among lake basins or impact strata (barren core, moderately trampled, and peripheral). Transplanting did not appear to be an important influence on changes in percent cover, as cover changes did not differ between planted and unplanted areas. Survival of transplants planted in 1987 was poor (19.2%), but survival of transplants planted in 1988 was higher (70.5%). Species richness increased slightly across all sampled quadrats ([mean] = 0.54 species per quadrat), with species richness changes on campsites ranging from -0.13 to 1.75 species per quadrat. One site had a mean decrease in species richness. Species richness changes differed among campsites, with the largest increases occurring on those campsites that also had the greatest increases in percent cover. Changes in species richness also differed among impact strata, with the largest increases occurring on barren core areas. There were small differences among lake basins, and species richness changes did not differ between planted and unplanted areas. Volunteer establishment occurred on all treated sites. The number of volunteers per site ranged from one to 45, and 29 species were represented. Individual quadrats had from one to four volunteers. Approximately 50% of the volunteers were producing seed, and overall vigor among volunteers was good. Numbers of volunteers per quadrat differed most strongly among campsites. Slight differences were detected among lake basins and impact strata, with numbers decreasing from barren core to peripheral quadrats. Differences in numbers of volunteers per quadrat between planted and unplanted areas were not detected. Soil scarification may enhance increases in cover, species richness and numbers of volunteers. However, the influence of scarification was tested on two sites only, and further study is recommended. The recovery process appeared to be strongly affected by factors operating at the campsite level. For example, sites with the greatest increases in percent cover also had the greatest increases in species richness and the most volunteers. These sites had coarse soils, relatively abundant sunlight and moisture, and were effectively protected from trampling after site treatment. Results indicate revegetation prescriptions should be made on a site-by-site basis. The performances of eleven species used in transplanting or occurring as volunteers were evaluated. Five species, Agrostis humilis, Calamagrostis breweri, Muhlenbergia filifonnis, Trisetum spicatum, and Calyptridium umbellatum show potential as colonizers in unassisted revegetation and may be useful in manual seeding treatments; three species, Calamagrostis breweri, Carex rossii, and Juncus panyi show potential for transplanting and nursery propagation; and two species, Carex spectabilis and Carex straminiformis, require further study to determine their effectiveness in subalpine revegetation treatments. / Graduation date: 1993

No description available.

Thesis (M.F.A.)--Rochester Institute of Technology, 2007. / Typescript. Includes bibliographical references (leaves 20-25).

The objective of this study was to quantitatively document interactions between black bears and backcountry visitors, and to identify the factors affecting those encounters. Fine hundred and ninety-two interactions were observed. The most common responses of visitors to bears were to watch, walk toward, and talk to others and/or point at the bear. Bears responded to humans largely by walking away, watching, traveling around, walking toward, and running away from people. Each behavior for both species was categorized into one of four response classes: (1) fear/avoidance, (2) neutrality, (3) approach, or (4) aggression. Over 65 percent of visitor responses were neutral. People were least likely to react to bears with fear/avoidance behavior. Bears also were most likely to be neutral. Of particular interest is the low occurrence of aggression shown by bears. Less than two percent of all responses fell into this category, most of which were exhibited by two animals. We witnessed no interactions which resulted in injury or even contact between visitors and bears. When ursid aggression did occur, bears appeared to be more aggressive in June, with younger visitors, and at close distances. Both human aggression and fear were correlated with short interactions. Bear behavior was greatly altered by possession of camper foods. Bears were more neutral and walked toward people less after they had begun to eat. They also showed much less fear of visitors at this time. Other correlations of both human and ursid behavior with biotic and abiotic variables ( temporal, spatial, environmental, etc.) are presented and discussed. Recommendations for improved management are also suggested.

Thesis (M.S.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 126-131). Also available on the World Wide Web.

Zugl.: Hannover, Univ., Diss., 2009

Thesis (M.A.)--Ohio University, June, 2003. / Title from PDF t.p. Includes bibliographical references (leaves 109-115)

No description available.

When creating a current work, artists cannot ignore the images that have preceded theirs. The history of a medium and the related history of subject matter is vital to the meaning of a new art work. Each sign and symbol has a connotation out of the artists’ control. The developed meaning of a symbol is inseparable for the viewer regardless of the acknowledgment of that meaning by the artist. To work with imagery and not address it’s historical context is to perpetuate it’s meaning. The only way to not state what has already been stated is to critically engage with the preexisting meaning of the imagery. An artist can combine symbols to create dual meanings or juxtapositions of meaning, or present the imagery in a way that complicates what it already signifies. “Apparent Fate,”my combined negative, photographic mural, uses imagery from Yosemite National Park to comment on photography’s function or purpose in history and in the current economic, political, environmental, and social conditions in California and society’s current stance on Manifest Destiny. How have the ideas of innate rights over people and places changed over time in American culture?