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Snowmachine use in Alaska has increased substantially during the previous decade. In addition, innovations in the design and performance of these vehicles has allowed riders to travel farther and faster per hour of riding time than was possible in the past. These design innovations have resulted in the elimination of de facto natural barriers (i.e. steep terrain) to snowmachine access. A potential consequence of this trend in use and these technological changes is increased impacts on the resources of Denali National Park and Preserve, including harm to the vegetation resources.
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I monitored the nesting area occupancy and reproductive success of Golden Eagles (Aquila chrysaetos) using data collected during two standardized aerial surveys in Denali National Park and Preserve (Denali) between 1988 and 2007. In 2007, occupancy of Golden Eagle nesting areas (91%), nesting rate (73%), and success rate (78%) were slightly higher than the long-term averages of those metrics. Fledging production (n = 72) was the second highest recorded in the study. During Golden Eagle surveys, I also collected data on the nesting area occupancy and reproductive success of Gyrfalcons (Falco rusticolus). In 2007, occupancy of Gyrfalcon nesting areas (46.7%) and success rate (42.8%) were lower than most previous years....
Categories: Data,
Publication;
Types: Citation,
Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Baseline 5-Data,
Birds,
Golden Eagles,
Monitoring 1-Changes in Plant and Animal Distribution: Fauna,
Species of Concern: Birds
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