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Full-Text Articles in Social and Behavioral Sciences
Woody Debris, Sediment, And Riparian Vegetation Of A Subalpine River, Montana, Usa., George P. Malanson, D. R. Butler
Woody Debris, Sediment, And Riparian Vegetation Of A Subalpine River, Montana, Usa., George P. Malanson, D. R. Butler
George P Malanson
No abstract provided.
Characteristics Of Two Landslide-Dammed Lakes In A Glaciated Alpine Environment, David Butler, George Malanson
Characteristics Of Two Landslide-Dammed Lakes In A Glaciated Alpine Environment, David Butler, George Malanson
George P Malanson
Two young landslide-dammed lakes in a remote portion of Glacier National Park, Montana were studied to determine if their characteristics are similar to those of older glacial lakes. We sampled lake depth along longitudinal transects and collected lake-bottom sediments for examination of particle size, organic matter content, and presence of benthic vegetation. Water-quality data were also analyzed. The older Slide Lake has a less steep bottom and supports benthic vegetation; the younger Slide Pond, with a steep bottom profile, does not. Organic matter content and sedimen textural characteristics were a function of location in each lake, particularly in terms of …
Post-Fire Regeneration Strategies Of Californian Coastal Sage Shrubs, George Malanson, John O'Leary
Post-Fire Regeneration Strategies Of Californian Coastal Sage Shrubs, George Malanson, John O'Leary
George P Malanson
Regeneration methods for coastal sage srub vegetation after fire were studied in the coastal Santa Monica Mountains of southern California. Six sites were sampled two years after a large fire of fall, 1978. The intensity of fire varied. Foliar cover and flowering incidence were recorded for individuals regenerating by resprouting or from seed. Resprouting plants contributed most to post-fire recovery, comprising 95% of the relative foliar shrub cover; 84% of resprout and 47% of seedling cover had flowered. An ANOVA of reproductive mode and fire intensity indicates that resprout total cover and individual size are significantly greater than those of …
The Rise And Fall Of The Uintah Valley Indian Reservation; Perception And Policy, George Malanson
The Rise And Fall Of The Uintah Valley Indian Reservation; Perception And Policy, George Malanson
George P Malanson
No abstract provided.
Farm Chemicals As Indicators Of Sediment Sources In Iowa Rivers, George P. Malanson, E. N. Nealson
Farm Chemicals As Indicators Of Sediment Sources In Iowa Rivers, George P. Malanson, E. N. Nealson
George P Malanson
Determination of the source of sediment in rivers and streams is important in order to effectively implement a program to reduce its concentration. This project uses agricultural chemicals as indicators of current sources of sediment from farm fields in the Cedar River, Iowa watershed. We hypothesized that the relations of sediment, nitrogen, and phosphorous yields to precipitation would indicate whether sediment originated from erosion of fields or from channel bank erosion of floodplains. The changes in sediment, nitrate, and phosphorus in the channel in response to rainfall events were determined. In simple regressions, all three variables have similar slopes when …
Complexity At Advancing Ecotones And Frontiers, George Malanson, Yu Zeng, Stephen Walsh
Complexity At Advancing Ecotones And Frontiers, George Malanson, Yu Zeng, Stephen Walsh
George P Malanson
Ecotones, such as advancing treelines, have been examined as complex self-organizing systems. Frontiers of human settlement may share some of their spatial characteristics, because they too include feedbacks between spatial pattern and process. Advancing frontiers of three study areas in the Amazonian region of Ecuador are analyzed with the aid of Landsat imagery to detect change. Power-law distributions of advancing deforestation are found, which are indicative of possible complexity. Alternative approaches in self-organized complexity, including self-organized percolation and the inverse-cascade model, and an approach to complexity involving optimization?highly optimized tolerance?are considered. Some combination of these, based on their common ancestry …
Observed And Modeled Directional Change In Riparian Forest Composition At A Cutbank Edge, John Kupfer, George Malanson
Observed And Modeled Directional Change In Riparian Forest Composition At A Cutbank Edge, John Kupfer, George Malanson
George P Malanson
Lateral migrations of river meanders create transient, spatially transgressive edges where the advancing cutbank edge encroaches upon interior floodplain forest communities. This spatial movement of edge toward the forest interior should initiate directional changes in species composition within a forest plot as it is affected by a changing microclimate and hydrological regime. We found that cutbank edge and forest interior sites in an Iowa floodplain contained markedly different plant assemblages. Species commonly associated with later stages of succession dominated interior sites while cutbank edge sites favored secondary, successional species. Assuming that the cutbank edge sites once contained vegetation similar to …
Floristic Variation Among Gravel Bars In A Subalpine River, Montana, Usa., George Malanson, D. Butler
Floristic Variation Among Gravel Bars In A Subalpine River, Montana, Usa., George Malanson, D. Butler
George P Malanson
The presence and abundance of plant species on active geomorphological surfaces, such as fluvial gravel bars in subalpine rivers, may reveal different effects of the environment, location, and chance on the assemblage of species during succession. Two-dimensional ordination mapping of species and correlations of abundance with simple environmental variables were used to examine relationships between the individual species and this dynamic environment. The ordination indicates that species are segregated by adaptations suggestive of successional pathway and successional stage. An examination of the distribution of species abundances plotted against the environmental variables reveals few distinct relationships. The differences in species abundances …
Considering Complexity, George Malanson
Progress In Soil Organic Matter Research, Vineet Yadav, George Malanson
Progress In Soil Organic Matter Research, Vineet Yadav, George Malanson
George P Malanson
Retention and sequestration of soil organic matter is extremely important for the maintenance of soil structure, agricultural productivity and carbon sequestration. Research in soil organic matter has advanced on many fronts in the last half century. During this time understanding of the factors governing plant litter decomposition has increased considerably resulting in the formulation of process and organism-based models. Remote sensing has been shown to be useful for quickly monitoring stocks of soil organic carbon in the topsoil although much remains to be done to establish its efficacy. Fluxes of soil organic matter in the changing climatic scenarios have been …
An Assessment Of Snow Avalanche Paths And Forest Dynamics Using Ikonos Satellite Data, S. Walsh, D. Weiss, D. Butler, George Malanson
An Assessment Of Snow Avalanche Paths And Forest Dynamics Using Ikonos Satellite Data, S. Walsh, D. Weiss, D. Butler, George Malanson
George P Malanson
No abstract provided.
Ordination Of Woody Vegetation In A Ouachita National Forest Watershed, George Malanson, Denise Marion
Ordination Of Woody Vegetation In A Ouachita National Forest Watershed, George Malanson, Denise Marion
George P Malanson
Species response to competition and other environmental gradients has important implications for forest ecosystem managers who desire to both maintain diversity and provide a sustained flow of forest goods and services. Woody species on a 140-acre watershed in the Ouachita National Forest are ordinated with detrended correspondence analysis (DCA) and canonical correspondence analysis (CCA) to identify the important influences on species distribution at this scale. Species composition is found to respond primarily to a moisture gradient, and secondarily to competition with shortleaf pine (Pinus echinata Mill.). Centrifugal organization of species along gradients is suggested by the relative locations of species …
Village Settlement, Deforestation, And The Expansion Of Agriculture In A Frontier Region: Nang Rong, Thailand, B. Entwisle, J. Edmeades, George Malanson
Village Settlement, Deforestation, And The Expansion Of Agriculture In A Frontier Region: Nang Rong, Thailand, B. Entwisle, J. Edmeades, George Malanson
George P Malanson
No abstract provided.
Habitats, Hierarchical Scales, And Nonlinearities: An Ecological Perspective On Linking Household And Remotely Sensed Data On Land-Use/Cover Change, George Malanson
Habitats, Hierarchical Scales, And Nonlinearities: An Ecological Perspective On Linking Household And Remotely Sensed Data On Land-Use/Cover Change, George Malanson
George P Malanson
No abstract provided.
Influences Of Geomorphology And Geology On Alpine Treeline In The American West; More Important Than Climatic Influences?, David Butler, George Malanson, Stephen Walsh, Daniel Fagre
Influences Of Geomorphology And Geology On Alpine Treeline In The American West; More Important Than Climatic Influences?, David Butler, George Malanson, Stephen Walsh, Daniel Fagre
George P Malanson
No abstract provided.
Lithologic, Structural, And Geomorphic Controls On Ribbon Forest Patterns In A Glaciated Mountain Environment, David Butler, George Malanson, Matthew Bekker, Lynn Resler
Lithologic, Structural, And Geomorphic Controls On Ribbon Forest Patterns In A Glaciated Mountain Environment, David Butler, George Malanson, Matthew Bekker, Lynn Resler
George P Malanson
So-called "ribbon forests" have been attributed to snowdrift patterns and fire history without reference to geomorphology [Vegetatio 19 (1969) 192]. This paper illustrates how site conditions of geomorphology and geology explain the origin of ribbon forests. In Glacier National Park, MT (USA), regional tectonic uplift associated with the Laramide Orogeny produced structural features that amplify lithologic differences. Pleistocene glaciation scoured deeply along the strike of bedding planes, highlighting this pattern and in some cases producing fine-scale parallel finger lakes between forested ribbon strips. Twelve ribbon forest sites on both sides of the Continental Divide were closely studied on stereoscopic aerial …
Soils And Pedogenesis At Alpine Tree Line, Ginger Schmid, David Butler, George Malanson, Lynn Resler
Soils And Pedogenesis At Alpine Tree Line, Ginger Schmid, David Butler, George Malanson, Lynn Resler
George P Malanson
No abstract provided.
The Geomorphic Influences Of Beaver Dams And Failures Of Beaver Dams, David Butler, George Malanson
The Geomorphic Influences Of Beaver Dams And Failures Of Beaver Dams, David Butler, George Malanson
George P Malanson
No abstract provided.
Sedimentation Rates And Patterns In Beaver Ponds In A Mountain Environment, David Butler, George Malanson
Sedimentation Rates And Patterns In Beaver Ponds In A Mountain Environment, David Butler, George Malanson
George P Malanson
Sediment depth was measured at several sites within each of eight beaver ponds in Glacier National Park, Montana, and sediment samples were collected from five of these ponds. Accumulation rates of sediments far exceeded published rates from boreal forest landscapes in eastern and central North America. Pond area strongly predicts volume of sedimentation. Textural differences illustrated spatial variations associated with position in a pond and along a pond sequence. Organic matter content was significantly higher in older ponds, and has ramifications for the development of the benthos and the long-term storage of matter in ponds. The role of beavers as …
Snow-Avalanche Paths; Conduits From The Periglacial-Alpine To The Subalpine-Depositional Zone, David Butler, George Malanson, Stephen Walsh
Snow-Avalanche Paths; Conduits From The Periglacial-Alpine To The Subalpine-Depositional Zone, David Butler, George Malanson, Stephen Walsh
George P Malanson
No abstract provided.
Precipitation And Temperature Estimation Error At Alpine Treeline Ecotones Using The Mountain Climate Simulator Model (Mt-Clim), Darren Grafius, George Malanson
Precipitation And Temperature Estimation Error At Alpine Treeline Ecotones Using The Mountain Climate Simulator Model (Mt-Clim), Darren Grafius, George Malanson
George P Malanson
In order to improve modeling of alpine treeline responses to climate change, estimations of snowfall at treeline sites are needed. The MT-CLIM climate model was evaluated for this purpose by extrapolating precipitation and temperature from standard weather stations at lower elevations to 30 alpine SNOTEL study sites across the western United States. Quantification of the topography between the base stations and the SNOTEL sites was used in inverse distance weighting and compared to straight-line weighting. The predicted temperature and precipitation under different weighting methods were compared to observed data over three months during the winter of 2006-2007. The errors were …
Alpine Treeline Of Western North America; Linking Organism-To-Landscape Dynamics, George Malanson, David Butler, Daniel Fagre, Stephen Walsh
Alpine Treeline Of Western North America; Linking Organism-To-Landscape Dynamics, George Malanson, David Butler, Daniel Fagre, Stephen Walsh
George P Malanson
No abstract provided.
Modeling Interactive Effects Of Climate Change, Air Pollution, And Fire On A California Shrubland, George Malanson, Walter Westman
Modeling Interactive Effects Of Climate Change, Air Pollution, And Fire On A California Shrubland, George Malanson, Walter Westman
George P Malanson
A computer simulation model (FINICS) was used to project the interactive effects of CO2-induced climate change on a drought-deciduous shrubland. FINICS simulates the competitive relations of five dominant shrub species of Californian coastal sage scrub, based on their aboveground growth and reproductive behavior. The model was used to simulate the separate and combined effects of altered precipitation, temperature, ambient ozone levels, and fuel loads and fire intensity, on species composition. Both growth chamber and field data were used to parameterize the model. Projections show that changes attributed to climate variation alone were markedly accentuated when the indirect effects of climate …
Introduction To The Special Issue: Mountain Geomorphology--Integrating Earth Systems, David Butler, Stephen Walsh, George Malanson
Introduction To The Special Issue: Mountain Geomorphology--Integrating Earth Systems, David Butler, Stephen Walsh, George Malanson
George P Malanson
No abstract provided.
The Biodiversity Crisis., J. Kupfer, George Malanson
The Biodiversity Crisis., J. Kupfer, George Malanson
George P Malanson
No abstract provided.
Neutral Landscapes: Bases For Exploration In Landscape Ecology, Qian Wang, George Malanson
Neutral Landscapes: Bases For Exploration In Landscape Ecology, Qian Wang, George Malanson
George P Malanson
No abstract provided.
Sedimentation Patterns And Rates In Beaver Ponds, David Butler, George Malanson
Sedimentation Patterns And Rates In Beaver Ponds, David Butler, George Malanson
George P Malanson
No abstract provided.
Ecological Response To Global Climatic Change, George Malanson, D. Butler, S. Walsh
Ecological Response To Global Climatic Change, George Malanson, D. Butler, S. Walsh
George P Malanson
This volume, celebrating the 100th anniversary of the Association of American Geographers, is dedicated to the idea that geographers can make substantive differences to the lives of people and to the well being of the planet that gives the discipline its name. WorldMinds provides broad exposure to a geography that is engaged with discovery, interpretation, and problem solving. Its 100 succinct chapters demonstrate the theories, methods, and data used by geographers, and exemplify the conceptual and topical richness of contemporary geography. The 150 contributing authors and co-authors address the challenges posed by issues such as globalization, regional and ethnic conflict, …
A Major Sediment Pulse In A Subalpine River Caused By Debris Flows In Montana, Usa, David Butler, George Malanson
A Major Sediment Pulse In A Subalpine River Caused By Debris Flows In Montana, Usa, David Butler, George Malanson
George P Malanson
No abstract provided.
Non-Equilibrium Geomorphic Processes And Patterns On Avalanche Paths In The Northern Rocky Mountains, U.S.A, David Butler, George Malanson
Non-Equilibrium Geomorphic Processes And Patterns On Avalanche Paths In The Northern Rocky Mountains, U.S.A, David Butler, George Malanson
George P Malanson
No abstract provided.