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dc.contributor.advisor Nelson, Craig en_US Murphy, Nathan L. en_US 2010-06-01T22:02:26Z 2010-06-19T14:14:25Z 2027-02-01T23:02:26Z 2010-06-01T22:02:26Z 2006 en_US
dc.description Thesis (PhD) - Indiana University, Ecology and Evolutionary Biology, 2006 en_US
dc.description.abstract Numerous studies have shown terrestrial salamanders of similar size compete strongly for cover objects on the forest floor. The cover objects provide a refuge that allows the owner more foraging opportunities throughout the year. Usually the competition between species is asymmetric and results in the exclusion of one of the species from large areas. In Hoosier National Forest, Plethodon cinereus and P. dorsalis coexist broadly and appear to share the same microhabitats. A number of factors might explain this unique case of coexistence. P. cinereus is more common in drier habitats and becomes more predominant as spring becomes warmer and drier compared to P. dorsalis. P. dorsalis is more common in the moister habitats, and predominates early in the spring. P. cinereus also looses water more slowly compared to P. dorsalis. Although P. cinereus is larger and shows higher levels of aggressive behaviors associated with cover object defense, P. dorsalis is better able to hold ownership of cover objects in the lab. The coexistence may be the result of the greater physiological tolerance of P. cinereus to drier conditions, which allow it to feed in habitats and at times unavailable to P. dorsalis. As conditions on the forest floor get warmer and drier as spring progresses, the more sensitive P. dorsalis has to retreat underground sooner than P. cinereus. P. cinereus will then have foraging opportunities under cover objects that are unavailable to P. doralis due to its sensitivity. en_US
dc.language.iso EN en_US
dc.publisher [Bloomington, Ind.] : Indiana University en_US
dc.rights This work is licensed under the Creative Commons Attribution 3.0 Unported License. en
dc.rights.uri en
dc.subject ecology en_US
dc.subject Plethodon en_US
dc.subject salamander en_US
dc.subject.classification Biology, Ecology en_US
dc.type Doctoral Dissertation en_US

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