Open Access. Powered by Scholars. Published by Universities.®
Articles 91 - 94 of 94
Full-Text Articles in Entire DC Network
The Fractal Shape Of Riparian Forest Patches, K. Rex, George Malanson
The Fractal Shape Of Riparian Forest Patches, K. Rex, George Malanson
George P Malanson
Remnant patches of a forest corridor were examined along the Iowa and Cedar Rivers, Iowa. A fractal dimension was found for these patches which was incorporated with the perimeter:area ratio in an index of shape. This index was then regressed on 5 hydrogeomorphic variables hypothesized to represent processes which might control patch dimensions, plus a variable to represent human impact. The hydrogeomorphic variables were derived from topographic maps; the impact variable used was the proportion of perimeter that was occupied by a road, railroad, transmission line, urban or other built area, or a straight line judged to be agricultural. Three …
Geomorphic Determinants Of Species Composition Of Alpine Tundra, Glacier National Park, U.S.A., George P. Malanson
Geomorphic Determinants Of Species Composition Of Alpine Tundra, Glacier National Park, U.S.A., George P. Malanson
George P Malanson
Because the distribution of alpine tundra is associated with spatially limited cold climates, global warming may threaten its local extent or existence. This notion has been challenged, however, based on observations of the diversity of alpine tundra in small areas primarily due to topographic variation. The importance of diversity in temperature or moisture conditions caused by topographic variation is an open question, and we extend this to geomorphology more generally. The extent to which geomorphic variation per se, based on relatively easily assessed indicators, can account for the variation in alpine tundra community composition is analyzed versus the inclusion of …
Mountain Treelines: A Roadmap For Research Orientation, George P. Malanson
Mountain Treelines: A Roadmap For Research Orientation, George P. Malanson
George P Malanson
For over 100 years, mountain treelines have been the subject of varied research endeavors and remain a strong area of investigation. The purpose of this paper is to examine aspects of the epistemology of mountain treeline research—that is, to investigate how knowledge on treelines has been acquired and the changes in knowledge acquisition over time, through a review of fundamental questions and approaches. The questions treeline researchers have raised and continue to raise have undoubtedly directed the current state of knowledge. A continuing, fundamental emphasis has centered on seeking the general cause of mountain treelines, thus seeking an answer to …
Adding Ecosystem Function To Agent-Based Land Use Models, Vineet Yadav, S Del Grosso, William Parton, George Malanson
Adding Ecosystem Function To Agent-Based Land Use Models, Vineet Yadav, S Del Grosso, William Parton, George Malanson
George P Malanson
The objective of this paper is to examine issues in the inclusion of simulations of ecosystem functions in agent-based models of land use decision-making,