Forest Branchlines Fall 2011

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Division’s Todd Katzner Seeks Safe Paths for North American Golden Eagles Renewable energy sources may minimize human impact on the environment, but they are not without ecological challenges. Wind power is a clean, promising technology and is likely to be used much more broadly throughout the midAtlantic region to supplement other energy sources in coming years and many projects are being planned or are already in development. Wind power installations placed within their seasonal ranges and migration routes can pose a serious threat to birds when they collide with wind turbine blades. Knowing more about the habits and patterns of regional species can help to design and locate wind installations so that impacts on bird populations are minimal. Todd Katzner, a jointly appointed researcher with the US Forest Service and the Wildlife and Fisheries Resources program in the Division of Forestry and Natural Resources at WVU, is currently collaborating with Phil Turk, professor of statistics, on a project to provide a framework for safer and less controversial development of wind power in the eastern golden eagle range. This is one of the first such research projects anywhere in the world, and the only one of its type in the eastern United States. The impacts of wind installations on bird populations are regionally specific because the species and their patterns vary by region and time of year. The mid-Atlantic region hosts significant populations of North American golden eagles, which breed in northeastern Canada and winter in the central and southern Appalachian mountains. Working with colleagues throughout the eastern range of the species, Katzner has been studying eastern golden eagle population trends and migration patterns for more than five years. “For years people have watched golden eagles migrate through Pennsylvania, without really knowing where they wintered ” Katzner explained. “We trapped some of those birds in Pennsylvania, outfitted them with Global Positioning System telemetry tags, and started to notice that they all wintered in West Virginia.” As it turns out, West Virginia has more golden eagles wintering within its borders than anywhere else east of the Mississippi. Katzner and Turk are trying document the migratory patterns of golden eagles so that wind installations can be located to minimize impact on the species. “A distance of just a couple of hundred meters might make a big difference in reducing fatalities,” Katzner said.

“The goal of this project is to develop high-resolution spatial maps showing migration corridors of and habitat use by eastern golden eagles in regions of high potential for wind development. These maps can then be used to guide safer development of wind energy while also protecting a suite of species similar to golden eagles,” Katzner said. To identify ways to mitigate the impacts of wind power development on eagles Katzner, Turk and their collaborators will use a multi-step strategy: • First, they will expand existing fluid-flow models of raptor migration for the eastern U.S. to identify broadscale migration patterns • Second, they will use completely novel high-resolution bird tracking devices to discover routes of passage and detailed flight behavior of individual golden eagles throughout the eastern U.S. • Finally, they will integrate these data and models to predict population-level migration patterns and individual flight behavior on migration This strategy will allow them to develop models that generate probable regional maps showing relative risk to birds from wind development. These maps will allow for specific recommendations regarding the development of new wind farms and operation of existing wind farms.

You can learn more about Dr. Katzner and his work at his personal website:

http://katznerlab.com/


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