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Home Range Size and the Effects of Abiotic Conditions on Snowshoe Hares (Lepus americanus) in the Adirondacks.

Mon, 06/30/2014 - 19:01
Abstract: In northern boreal forest landscapes snowshoe hares (Lepus americanus) are an integral part of the ecosystem. They significantly impact vegetation, predators, and other prey species through their interactions. By understanding how snowshoe hares move on the landscape and their home range sizes. It can allow for insight into how they modify their behavior in relation to the distribution of natural resources, and predators on the landscape. The purpose of this research is to determine how snowshoe hare modify movement rate within home range in relation to abiotic conditions. Research took place within the Adirondack Visitor’s Interpretive Center, in the Adirondack Park, in northern New York State. Radiotracking was done in average 8 minute intervals multiple times a day in order to detect movement rates. Snowshoe hare was radio tracked and their locations were triangulated using an arithmetic mean. The locations were used to generate a home range with kernel density estimators and minimum convex polygons. Average snow depth had a negative effect on movement rate (p-value=0.006, r2=0.548). Movement rate was not affected by temperature (p-value=0.341, r2=0.003). Movement rate was also not affected by wind speed (p-value=0.696, r2=0.0515). Proximity of tracking location to hare in relation to movement rate showed a slight relationship (p-value=0.0009, r2=0.162). The snowshoe hare moved an average of 14.044 m/min for the total of 11 tracking days. The average home range size of the snowshoe hare 179.168 ha. The average radio telemetry error was. The snowshoe hare spent more time in coniferous habitat in comparison to mixed-deciduous (Χ2= 9.07177, p-value=0.011). The effects of abiotic conditions were close to expectations, and the home range size was larger than other published home range size studies of snowshoe hare within the Adirondack Park.
Access: Yes
Literary Rights: Off
Major: Fisheries and Wildlife Science
Year: 2011
Authors: Jacob Dillon