Creating a cliff chipmunk and their habitat association map in southern Idaho

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The cliff chipmunk (Tamias dorsalis) has been listed as a Bureau of Land Management (BLM) sensitive species in Idaho because the species has not been studied for more than a century. The author conducted field studies in the summers of 2003 and 2004 to find cliff chipmunks in southern Idaho and northern Utah. Thirty-one presence points and 124 absence points were recorded. Using Arcview statmod extension, the author then extracted elevation, aspect, slope, and habitat type information for each point. The nearest water sources were acquired by using the Arcview script “nearestf.” Based on this information, statistical analysis was performed using SAS. The water distance and aspect were somehow correlated; the author did not need to use both but chose to use aspect because it was more significant than the water distance. Logistic regression was used to create a model. Based on the regression, the author created a map using four variables. However, none of the pixels had all four variables; 77,372 pixels had three variables. This result was not what was expected, and the author concludes that the statistical analysis needs to be reconsidered and modified.

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ELECTRONIC FILE - Zoology