Social and Behavioral Sciences Commons^™

Valuing Ecosystem Services In Coastal Management Policy: Looking Beyond The Here And Now, Chad J. Mcguire

Chad J McGuire

Climate-Induced Sea Level Rise And Sustainable Coastal Management: The Influence Of Existing Policy Frameworks On Risk Perception, Chad J. Mcguire

Chad J McGuire

Losing The Message: Some Policy Implications Of Anthropocentric Indirect Arguments For Environmental Protection, Chad J. Mcguire

Chad J McGuire

Spatial Hyperdynamism In A Post-Disturbance Simulated Forest, Qian Wang, George Malanson

George P Malanson

Spatial hyperdynamism in a post-disturbance simulated forest is studied. When the cutting rate is high and if the cutting pattern is scattered or involving a larger area, the two landscape metrics have much greater variance after cutting. After cutting the potential interaction between different species is more dynamic than that before the cutting, which can be detected from the variation of the proximity measure. These dynamics are primarily driven by the appearance and disappearance of single cell patches as colonizers temporarily occupy cells vacated by the deaths of better competitors. Boundary cells are most likely to be dynamic because their …

Comment On Modeling Ecological Response To Climatic Change, George Malanson

George P Malanson

No abstract provided.

Canadian Landform Examples; 27, Beaver Landforms, David Butler, George Malanson

George P Malanson

No abstract provided.

Ecological Processes And Spatial Patterns Before, During And After Simulated Deforestation, George Malanson, Qian Wang, John Kupfer

George P Malanson

Ecological processes and spatial patterns, before, during and after simulated deforestation are examined. A competition-colonization simulation, in which the primary trade offs are represented in a spatially explicit model, is used to explore the consequences of additional aspects of landscape dynamics following deforestation for plant diversity and community structure. Deforestation changes the spatial pattern of the landscape, and species respond differently because of their different dispersal abilities. The basic lessons of competition-colonization models for deforestation stand, but the ensured extinction implied by the extinction debt concept is further ameliorated as more realistic pattern-process relations are theorized.

Geomorphological Limits To Self-Organization Of Alpine Forest-Tundra Ecotone Vegetation, Yu Zeng, George Malanson, David Butler

George P Malanson

Feedback in the establishment of vegetation has been shown to produce spatial patterns that differ from the geomorphological basis for resources. The dynamics of these spatial patterns have been characterized as self-organization because local processes produce them at landscape scales. Geomorphic patterns could, however, enhance or disrupt the processes that lead to patterns and the interpretation of self-organization. A simulation model that showed such indication of self-organization at alpine forest-tundra ecotones is modified to incorporate a geomorphic feature commonly seen in this environment - solifluction steps - as an exogenous condition in the model. Analyses linking spatial patterns and rates …

Nearest Neighbor Analysis Of Miniature Polygonal Patterned Ground, Eastern Glacier National Park, Montana, David Butler, George Malanson, Thomas Wilbanks

George P Malanson

No abstract provided.

Effects Of Dispersal, Population Delays, And Forest Fragmentation On Tree Migration Rates, George Malanson, David Cairns

George P Malanson

Examining the relation between the dispersal of seeds across landscapes and the migration of species can inform studies of processes such as invasions and response to climatic change. In this research a spatially explicit model is used to analyze the effects of dispersal probability, limits on establishment, generation time, seed crop probability, and varying proportions and patterns of landscape fragmentation on migration rate. Comparisons are made with rates inferred for migrations based on isopols of species range changes in the Holocene (20–200 km/century). The effects of the parameters on migration rate in the model are additive. Dispersal probability, related to …

Turf-Banked Terrace Treads And Risers, Turf Exfoliation And Possible Relationships With Advancing Treeline, David Butler, George Malanson, Lynn Resler

George P Malanson

Fine-scale geomorphic/pedogenic processes at alpine treeline may facilitate the initial stages of conifer invasion of alpine tundra. Turf-banked terraces and turf exfoliation associated with solifluction may provide both the topographic protection and the seedbed necessary for conifer establishment above treeline. The morphometry, stoniness and surface penetrability of turf-banked terraces were recorded. Whereas differences among sites exist due to topographic constraints, differences in soil penetrability depend on turf exfoliation. Exfoliated turf risers are significantly more penetrable than non-exfoliated solifluction risers and adjacent treads. These penetrable microsites provide favorable conditions for seed germination. The process of turf exfoliation may play a role …

Fire History And Patterns Of Venturan Subassociations Of Californian Coastal Sage Scrub, George Malanson

George P Malanson

Californian coastal sage scrub has floristically distinct subassociations with sharp boundaries in the Santa Monica Mountains. This mesoscale biogeographic pattern has been variously attributed to the timing and pattern of fire and to differences in the moisture availability on sites. An examination of the actual fire history of sites reveals that recent fire events are unlikely to have caused the observed patterns. Sites with similar fire histories are not as similar in vegetation as sites with different fire histories but similar aspect. Single short fire intervals do not result in dissimilar communities; fires are unlikely to recur with the same …

Effects Of Feedbacks And Seed Rain On Ecotone Patterns, George Malanson

George P Malanson

Ecotones can be abrupt changes in vegetation on gradual abiotic gradients, such as some treelines, and so have been considered as potential indicators of response to climatic change and regulators of fluxes across landscapes. Factors of positive feedback for growth and establishment and seed rain from source areas have been suggested as playing a role in such patterns and dynamics. The effects of variation in feedback strength and seed rain on the abrupt pattern have not, however, been assessed. A spatially explicit computer simulation is used to represent an ecotone as might occur at a mountain treeline. The steepness of …

Geomorphic And Biogeographic Setting Of The Rocky Mountains; Rocky Mountain Futures; An Ecological Perspective, David Cairns, David Butler, George Malanson

George P Malanson

No abstract provided.

Topographic Shelter And Conifer Establishment And Mortality In An Alpine Environment, Glacier National Park, Montana, Lynn Resler, David Butler, George Malanson

George P Malanson

No abstract provided.

Linear Forest Patterns In Subalpine Environments, Matthew Bekker, George Malanson

George P Malanson

Studies of feedback between ecological pattern and process can benefit from the analysis of visually striking patterns, as they may reveal underlying processes and clarify the relative role of exogenous versus endogenous factors in driving vegetation change. Roughly linear forest patches are common in subalpine environments, including `hedges', `ribbon forest', and `Shimagare' or `wave regenerated forests' (waves). The influence of wind is common among these patterns, but the role of positive feedback, the most important component of self-organization in biological systems, varies. Hedges are orientated parallel to prevailing winds in several mid-latitude mountain ranges worldwide. Desiccation and ice-particle abrasion kills …

Geomorphic Patterns And Processes At Alpine Tree Line, David Butler, George Malanson, Lynn Resler, Stephen Walsh

George P Malanson

No abstract provided.

Spatial Representations Of Habitat In Competition-Colonization Models, George Malanson

George P Malanson

No abstract provided.

Natural Areas Facing Climate Change, George Malanson

George P Malanson

No abstract provided.

Extinction-Debt Trajectories And Spatial Patterns Of Habitat Destruction, George Malanson

George P Malanson

No abstract provided.

Tree-Ring Analysis And Natural Hazard Chronologies; Minimum Sample Sizes And Index Values, David Butler, George Malanson, Jack Oelfke

George P Malanson

No abstract provided.

Dispersal Across Continuous And Binary Representations Of Landscapes, George Malanson

George P Malanson

No abstract provided.

Mapping, Modeling, And Visualization Of The Influences Of Geomorphic Processes On The Alpine Treeline Ecotone, Glacier National Park, Mt, Usa, Stephen Walsh, David Butler, George Malanson, Kelley Crews-Meyer

George P Malanson

Spatially explicit digital technologies are integrated within a geographic information science (GISc) context to map, model, and visualize selected direct and indirect geomorphic processes that influence the spatial organization of the alpine treeline ecotone (ATE) in Glacier National Park (GNP), MT. GISc is used to examine alpine treeline and its biotic and abiotic controls through the application of multi-resolution remote sensing systems, geospatial information and product derivatives, and simulations of treeline spatial organization. Three geomorphic features are examined: relict solifluction terraces, evidence of nonlinearity in the development of a catena, and the locations of isolated boulders. The significance of these …

Beaver, Treefall, And Cutbank Erosion In Midwestern Rivers, David Butler, George Malanson, John Kupfer, Philip Pryde

George P Malanson

No abstract provided.

Adding Ecosystem Function To Agent-Based Land Use Models, V. Yadav, S. Del Grosso, W. Parton, George Malanson

George P Malanson

No abstract provided.

Alpine Treeline, Climate, And Environmental Changes, George Malanson, David Butler

George P Malanson

No abstract provided.

Spatially Explicit Historical Land Use Land Cover And Soil Organic Carbon Transformations In Southern Illinois, Vineet Yadav, George Malanson

George P Malanson

No abstract provided.

Effect Of Landscape Position On The Sediment Chemistry Of Abandoned-Channel Wetlands, W. Schwarz, George Malanson, F. Weirich

George P Malanson

The nature of sediments in abandoned channels is an important component of their development as floodplain wetlands. The texture, organic matter, phosphorous, potassium, and nitrogen content of sediments were determined for abandoned channels along the Iowa and Cedar Rivers near their confluence in Iowa. Differences in the levels of these constituents were examined among categories of three landscape gradients: present connectivity to the river, time since abandonment, and proximity to agricultural land use. Local scale processes of ecological development are seen in the importance of time for increased organic matter and nitrogen. Basin scale processes of sediment transport and deposition …

Woody Debris, Sediment, And Riparian Vegetation Of A Subalpine River, Montana, U.S.A, George Malanson, David Butler

George P Malanson

No abstract provided.

Variability In An Edaphic Indicator In Alpine Tundra, George Malanson, D. Butler, D. Cairns, T. Welsh

George P Malanson

No abstract provided.