A spatially explicit population model written in C++ programming language is used in
this study examining the population dynamics of the Desert Tortoise (Gopherus
agassizii) in the California Mojave Desert. The model is constructed with hexagonal
divisions of space, and with one-year increments of time. Four thematic maps: vegetation,
soil...
Rationing float use on many of the nation's whitewater rivers is
a significant issue in recreation management. Alleged inequities in
the rationing policies used in Hells Canyon National Recreation Area
prompted an evaluation of procedures for allocating private and
commercial float use on the Hells Canyon portion of the Snake...
This work examined the transformation of the concept of biodiversity into natural resource policies of the U.S. Agency for International Development and the World Bank through 1988. The study identified several groups as playing key roles in the transformation process. These were nongovernmental environmental organizations, the scientific community, and the...
Ecological regionalization is a form of spatial
classification, where boundaries are drawn around areas
relatively homogeneous in landscape characteristics. In the
delineation of ecological regions, or ecoregions, the process
includes the analysis of ecosystem structure and function.
Ecoregions have been developed at national and state scales
for research and resource...
present a unique modeling approach to investigate the
potential impacts of future land use alternatives on amphibian population
dynamics in two agricultural watersheds in central Iowa. An individual-based
spatially explicit population was used to predict the consequences of alternative
landscape design and management for populations of four amphibian species. The...
Instream flow protection in western prior appropriation states is a relatively new phenomenon.
Integrating instream flow protection measures with the older water law has been accomplished with varying
degrees of success. Idaho relies on appropriation of unappropriated water by the Idaho Water Resource Board
for protection of instream flows. Idaho's...
Management of national forests evokes controversy about the
allocation of limited resources among competing uses. A Land and Resource
Management Plan (Forest Plan) has been prepared for the Payette National
Forest. The Forest Plan describes resource management practices and the levels
of resource production at which the Forest would be...
This research was designed to search for regularities in
the spatial pattern resulting from government designation of
protected areas for conservation purposes on the African continent.
Four countries were used to test for a relationship between
protected areas and vegetation types and also whether colonial
background had an impact on...
Compromises required for the passage of the Wilderness
Act (1964) created inherent conflicts in the designation and administration
of wilderness areas. Subsequent legislation helped to more
firmly interpret and define the Act. Attendant policy changes suggest
a trend to increase the recreational and economic utility of wilderness.
Policy changes also...
