Scholarship & Research
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Item The early embryology of Aulocara elliotti (Thomas) (Orthoptera: Acrididae) with studies on the effects of maternal age and environment of the developmental rate of the egg(Montana State University - Bozeman, College of Agriculture, 1973) Wessel, Margaretha HardersItem Protozoan and viral pathogens of grasshoppers(Montana State University - Bozeman, College of Agriculture, 1969) Henry, John EdwardItem The leafhoppers of Montana(Montana State University - Bozeman, College of Agriculture, 1928) Fox, David EgbertItem Descriptions of the life cycle, external embryogenesis and thoracic gland development of the cottonwood beetle, Chrysomela semota Brown (Coleoptera-Chrysomelidae)(Montana State University - Bozeman, College of Agriculture, 1980) Stewart, Linda SusanItem The field biology of Camnula pellucida Scud(Montana State University - Bozeman, College of Agriculture, 1948) Riegert, Paul WilliamItem A review of the ironclad beetles of the world : (Coleoptera Zopheridae: Phellopsini and Zopherini)(Montana State University - Bozeman, College of Agriculture, 2006) Foley, Ian Andrew; Chairperson, Graduate Committee: Michael A. Ivie; Matt Lavin (co-chair)Phellopsis LeConte is revised. Phellopsis porcata (LeConte) is returned to valid status and P. yulongensis NEW SPECIES is described. Phellopsis montana Casey NEW SYNONYMY (NS) and P. robustula Casey NS = P. porcata (LeConte). Phellopsis imurai Masumoto = P. amurensis (Heyden) NS. Species redescriptions, a key to species and notes on the history, biology and biogeography of the group are provided. Phylogenetic analyses support several changes to sustain monophyletic genera of Zopherini because the genera Meralius Casey, Nosoderma Solier, and Phloeodes LeConte were found to be polyphyletic. The genus Sesaspis Casey NEW STATUS is re-recognized, and redescribed to include the following species: Sesaspis denticulata (Solier), S. emarginatus (Horn) NEW COMBIATION (NC), S. lutosus (Champion) NC, S. doyeni (García-París et al.) NC, S. adami NEW SPECIES, S. ashei NEW SPECIES, and S. triplehorni NEW SPECIES. Phloeodes LeConte is clarified with 10 new synonymies [P. diabolicus (LeConte) = P. pustulosus (LeConte) NS, P. latipennis Casey NS, P. ovipennis Casey NS, P. elongatus Casey NS, P. scaber Casey NS, P. angustus Casey NS, and P. remotus Casey NS).Item Effects of shelterwood management on flower-visiting insects and their floral resources(Montana State University - Bozeman, College of Agriculture, 2005) Fultz, Jessica Erin; Chairperson, Graduate Committee: Kevin O'Neill.Habitat alteration can affect pollinating-insect community structure, decreasing the efficiency of pollinators on which many agricultural and natural ecosystems rely. Within the Tenderfoot Creek Experimental Forest (TCEF), located in the Little Belt Mountains of Central Montana, two different types of silvicultural techniques, even and group shelterwood, were applied to alter the natural habitats within the lodgepole pine (Pinus contorta) forests. Following logging, surveys of the flower-visiting insects and their floral resources were conducted within four treatments, even and group shelterwood, unlogged and meadow. In addition, individual insects were collected and the pollen removed from their bodies was counted and identified. The density of floral resources and the abundance of flower-visiting insects, as well as several diversity measures of both, were calculated, to examine the response of insects and plants to logging. Spearman rank correlations were used to examine changes over the sample years. Non-metric multi-dimensional scaling (NMS) was used to create ordinations of the treatments while multiple response permutation procedure (MRPP) tested the hypothesis of no difference between treatments with respect to either floral resources or flower-visiting insects. Correlations between the abundances of floral resources and flower-visiting insect taxa were also conducted using Mantel tests. Kruskal-Wallis tests were used to test the hypothesis of no difference between insect taxa with respect to pollen quantity and richness. NMS was used to create ordinations of species within families with respect to types of pollen and quantity carried. Changes in density, abundance, and diversity between years were detected as were differences among treatments. Associations between floral resources and flower-visiting insects were detected. Differences among insect species with respect to pollen type and quantity were detected. Overall, the alteration of the original forest habitats changed the community structure of not only the flower-visiting insects but also their floral resources in the two shelterwood treatments.Item Effects of volcanic ash on the insect food of the Montserrat Oriole Icterus oberi Lawrence 1880(Montana State University - Bozeman, College of Agriculture, 2005) Marske, Katharine Ann; Chairperson, Graduate Committee: Michael A. Ivie.The Montserrat Oriole, Icterus oberi Lawrence, endemic to the West Indian island of Montserrat, has grown critically endangered since volcanic eruption began on that island in 1995. The Soufriere Hills Volcano has devastated much of the oriole's native habitat, and populations within intact forests have plummeted in recent years. One hypothesized cause for the Montserrat Oriole's decline is that low insect prey numbers during the nesting season, as a result of volcanic ash in the environment, is resulting in increased nest failure. The hypothesis of a negative effect of ash on canopy arthropods was tested. Four sites, varying in the level of ash deposition they typically receive, were sampled via canopy fogging over a 14-month period. Results indicate that ash is having a significant negative impact on canopy arthropods, particularly at the sampling sites closest to the volcano, but that the decline is limited to a few insect taxa.