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A Biogeographic Review Of The Spider Genus Agelenopis (Araneae Agelenidae), Thomas Charles Paison
A Biogeographic Review Of The Spider Genus Agelenopis (Araneae Agelenidae), Thomas Charles Paison
Masters Theses
This study is a review of the biogeography of the North American spider genus Agelenopsis (Giebel) (Araneae: Agelenidae). Previous theoretical and empirical work provides support for the hypothesis that many North American taxa have been subject to disjunction and divergence due to the effects of Late Pleistocene glacial/interglacial cycles. A summary of the current knowledge of the biology and ecology of the 13 Agelenopsis species is developed and new distribution maps for each species are generated from published collections. A reconstructed phylogeny for the genus is created based on the adult sexual morphology of the species. A detailed hypothesis for …
Southern Appalachian Fir And Fir-Spruce Forest Community Changes Following Balsam Woolly Adelgid Infestation, George Francis Smith
Southern Appalachian Fir And Fir-Spruce Forest Community Changes Following Balsam Woolly Adelgid Infestation, George Francis Smith
Masters Theses
The southern Appalachian fir and fir-spruce forests are unique glacial relict communities that occupy 26,600 ha at the highest elevations of only seven mountain areas. Over the last three and a half decades an exotic insect, the balsam woolly adelgid (Adelges piceae Ratz.), has caused catastrophic mortality to populations of the endemic Fraser fir (Abies fraseri (Pursh) Poir.) throughout its entire native range. In 1990 and 1991, a set of temporary and permanent plots were established at the summits of five mountains in the Great Smoky Mountains to study processes of community change in overstory and understory composition …