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Browsing by Author "Grun, Hannah"

Now showing 1 - 2 of 2
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    The impact of Geomys bursarius on prairie vegetation diversity in Minnesota
    (2010-11-30) Deets, Lauren; Grun, Hannah; Sievert, Adam
    Plains Pocket Gopher (Geomys bursarius) has shown significant effects on soil alteration and plant population by the building of mounds. Typically inhabiting grasslands, prairies, and other open areas, this alteration of the soil is thought to alter the natural state of the vegetation where these gophers are present. Data from Itasca State Park, located in Clearwater County, Minnesota, were taken by; determining if distinct patches of vegetation were associated with gopher mounds, making mound classifications of random 20 meter transects, and specifically looking at differences in vegetation between abandoned mounds and control sites. Results using chi-squared and t-testing showed significant differences (P<.0001), concluding that gopher mounds play a distinct role in the alteration and diversification of vegetation within grassland habitats.
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    Small Mammal Population Dynamics: Prairie Versus Forest Habitats
    (2010-12-01) Grun, Hannah
    Small mammals of North America still have uncertain distribution factors, and abundance of these mammals need further investigation. Studying small mammal interactions are very important when pertaining to the general public mainly due to their herbaceous diet that feed on our crops, and are also hosts for parasites that transmit diseases to other larger animals. Six different prairie sites were chosen, along with six different forest sites to get a well understanding of which specie prefers certain habitats. With the use of Russian, Longworth, and Sherman traps; 144 specimens captured, eleven different species were found from all sites, and only few were found within both the prairie and forest habitats. Perymiscus (PEXX) had a greater frequency in the forest, than in the prairie (f= .045, f=.0018), Spermipholus tridecumlineanus (SPTR) made up most of the population found in the Prairie; however Myotis gapperi (MYGA) was only found in the forests. Further investigation could give us insight on why these species prefer these habitats.