3 resultados para vegetation burning

em Bucknell University Digital Commons - Pensilvania - USA


Relevância:

20.00% 20.00%

Publicador:

Resumo:

This thesis assesses relationships between vegetation and topography and the impact of human tree-cutting on the vegetation of Union County during the early historical era (1755-1855). I use early warrant maps and forestry maps from the Pennsylvania historical archives and a warrantee map from the Union County courthouse depicting the distribution of witness trees and non-tree surveyed markers (posts and stones) in early European settlement land surveys to reconstruct the vegetation and compare vegetation by broad scale (mountains and valleys) and local scale (topographic classes with mountains and valleys) topography. I calculated marker density based on 2 km x 2 km grid cells to assess tree-cutting impacts. Valleys were mostly forests dominated by white oak (Quercus alba) with abundant hickory (Carya spp.), pine (Pinus spp.), and black oak (Quercus velutina), while pine dominated what were mostly pine-oak forests in the mountains. Within the valleys, pine was strongly associated with hilltops, eastern hemlock (Tsuga canadensis) was abundant on north slopes, hickory was associated with south slopes, and riparian zones had high frequencies of ash (Fraxinus spp.) and hickory. In the mountains, white oak was infrequent on south slopes, chestnut (Castanea dentata) was more abundant on south slopes and ridgetops than north slopes and mountain coves, and white oak and maple (Acer spp.) were common in riparian zones. Marker density analysis suggests that trees were still common over most of the landscape by 1855. The findings suggest there were large differences in vegetation between valleys and mountains due in part to differences in elevation, and vegetation differed more by topographic classes in the valleys than in the mountains. Possible areas of tree-cutting were evenly distributed by topographic classes, suggesting Europeans settlers were clearing land and harvesting timber in most areas of Union County.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Burning Skies is a seventy-page novella completed as an Honors Thesis in Creative Writing. The story is set in Los Angeles, California, during the 1992 riots surrounding the controversy over the beating of Rodney King by four white police officers. The story is toldthrough the perspectives of the four main characters: Erin, a woman who is four months pregnant with a baby she desperately wants; her husband David, who has moved the couple out to California so that he can pursue his dream of being a cinematographer; Abby, David’s deeplyreligious younger sister who has unexpectedly flown out to Los Angeles from her home in Indiana after discovering her husband’s infidelity; and Cameron, a black man training to be a pastor who Abby has befriended through her years of missionary work in Los Angeles.The novella follows the events of the riots as they break out all across the city and the personal dramas of each of the four main characters, looking at how the public interacts with theprivate and examining the ways in which explosions in the public and political sphere can ricochet into our private and personal lives. It is a story about the political and racial climate in Los Angeles in the early 1990s, but it is also a story about four human beings, about their needs and their desires, about their struggles to survive in an unpredictable world. The novella showcases the skills and techniques the author has learned after four years of studying fiction at Bucknell University; it can best be described as a work of realistic fiction.