Publications

No abstract available.

Improved sampling designs are needed to detect, monitor, and predict plant migrations and plant diversity changes caused by climate change and other human activities. We propose a methodology based on multi-scale vegetation plots established across forest ecotones which provide baseline data on patterns of plant diversity, invasions of exotic plant species, and plant migrations at...

We examined 1280 bats of 12 species submitted to the Wyoming State Veterinary Laboratory (WSVL) for ra­bies testing between 1981 and 1992. The most abundant species in the sample was Myotis lucifugus, followed by Epte­sicus fuscus, Lasionycteris noetivagans, M. ciliolabrum, and M. volans. Using the WSVL sample and additional museum specimens, we summarized available records and knowledge...

We simulated population dynamics of bighorn sheep (Ovis canadensis) inhabiting six discrete habitat patches in the Badlands ecosystem, South Dakota. Modeled populations were subjected to a range of potential management actions and rates of disease-causing infection. Simulated disease varied in severity from mild (∼12% mortality) to severe (∼67% mortality), with infections imposed once...

In 1991, the National Park Service (NPS) initiated a series of research studies to support an effort to restore bighorn sheep (Ovis canadensis) into 15 national parks in the Intennountain West and Colorado Plateau areas (Fig. 1). The Biological Resources Division of the U.S. Geological Survey provided scientific advice and research coordination for the NPS restoration (Fig. 2). The...

Bighorn sheep (Ovis canadensis) were historically a ubiquitous species. Prior to the arrival of Europeans, they were seemingly widespread in nearly all steep habitats in the mountains, foothills, river breaks, and prairie badlands of the western United States. However, since catastrophic declines in the late 1800s and early 1900s, most extant populations have existed as small, isolated...

Although limnologists have long been interested in regional patterns in lake attributes, only recently have they considered lakes connected and organized across the landscape, rather than as spatially independent entities. Here we explore the spatial organization of lake districts through the concept of landscape position, a concept that considers lakes longitudinally along gradients of

No abstract available.

Applied historical ecology is the use of historical knowledge in the management of ecosystems. Historical perspectives increase our understanding of the dynamic nature of landscapes and provide a frame of reference for assessing modern patterns and processes. Historical records, however, are often too brief or fragmentary to be useful, or they are not obtainable for the process or...

No abstract available.

No abstract available.

The biogeographic information described here will help identify the uniqueness of different regions of the plains to migrating shorebirds. Although shorebirds migrating along Atlantic and Pacific coastal areas are capable of long jumps between refueling stops, there is evidence that some species move short rather than long distances between refueling sites. Maps of distribution patterns...