Progress Report: Multi-scale assessment of wildlife response after juniper removal in a sagebrush steppe landscape
This report summarizes activities and data collection outcomes for Cooperative Agreement Award F16AC01182, specifically those research activities conducted as a multi-scale assessment of the effects of juniper removal on songbird, small mammal, and raptor/corvid species. In 2017, we conducted 270 surveys for songbirds, 10 surveys for small mammals, and 77 surveys for avian predators that potentially affect greater sage-grouse. We detected 45 songbird species, 6 mammal species, and 9 species of aerial predators. Data collected by PhD student Aaron Young (email@example.com) will be used as part of a doctoral dissertation. Final products are expected to include a final report, a graduate student dissertation and associated...
Developed alongside a scenario planning process, this spatially explicit analysis assesses key stressors on Great Basin systems in order to inform alternative futures. Project outputs include land cover, plant and wildlife species and community distributions, urban development, and future habitat under climate scenarios. These data are available to be explored and downloaded through a web-based portal.
Journal Article: Geographic Variability in Elevation and Topographic Constraints on the Distribution of Native and Nonnative Trout in the Great Basin
Understanding local and geographic factors influencing species distributions is a prerequisite for conservation planning. Our objective in this study was to model local and geographic variability in elevations occupied by native and nonnative trout in the northwestern Great Basin, USA. To this end, we analyzed a large existing data set of trout presence (5,156 observations) to evaluate two fundamental factors influencing occupied elevations: climate-related gradients in geography and local constraints imposed by topography. We applied quantile regression to model upstream and downstream distribution elevation limits for each trout species commonly found in the region (two native and two nonnative species). With...
Pacific trout Oncorhynchus spp. in western North America are strongly valued in ecological, socioeconomic, and cultural views, and have been the subject of substantial research and conservation efforts. Despite this, the understanding of their evolutionary histories, overall diversity, and challenges to their conservation is incomplete. We review the state of knowledge on these important issues, focusing on Pacific trout in the genus Oncorhynchus. Although most research on salmonid fishes emphasizes Pacific salmon, we focus on Pacific trout because they share a common evolutionary history, and many taxa in western North America have not been formally described, particularly in the southern extent of their ranges....