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- Gypsy moth (2)
- Autographa californica nucleopolyhedrovirus (1)
- Azygospores (1)
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- Density dependence (1)
- Entomophaga maimaiga (1)
- Entomophthorales (1)
- Heliothis virescens (1)
- Host pathogen dynamics (1)
- Lepidoptera (1)
- Midgut physiology (1)
- Nucleopolyhedroviral (1)
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- Resting spores (1)
- Sampling (1)
- Species abundance (1)
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- Trichoplusia ni granulovirus (1)
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Articles 1 - 7 of 7
Full-Text Articles in Life Sciences
Tree Canopy Cover Influences Habitat Use Of Breeding Birds At Jack Mountain Wildlife Management Area, Kaleigh Thomas
Tree Canopy Cover Influences Habitat Use Of Breeding Birds At Jack Mountain Wildlife Management Area, Kaleigh Thomas
Scholars Day Conference
Across the United States, bird populations have declined due to habitat loss. To better understand habitat use by birds, researchers observed populations at Jack Mountain Wildlife Management Area in southwest Arkansas. Students at Ouachita Baptist University surveyed 94 point count locations to estimate species diversity (total number of species observed) and species abundance (total number of individuals observed). At each point, students recorded the percentage of tree canopy cover, ground cover, midstory cover, and shrub cover. These variables were used as explanatory variables in multiple regression analyses to determine which variables were influential in explaining variation in species diversity and …
Tree Canopy Cover Influences Habitat Use Of Breeding Birds At Jack Mountain Wildlife Management Area, Kaleigh Thomas
Tree Canopy Cover Influences Habitat Use Of Breeding Birds At Jack Mountain Wildlife Management Area, Kaleigh Thomas
Honors Theses
Across the United States, bird populations have declined due to habitat loss. To better understand habitat use by birds, researchers observed populations at Jack Mountain Wildlife Management Area in southwest Arkansas. Students at Ouachita Baptist University surveyed 94 point count locations to estimate species diversity (total number of species observed) and species abundance (total number of individuals observed). At each point, students recorded the percentage of tree canopy cover, ground cover, midstory cover, and shrub cover. These variables were used as explanatory variables in multiple regression analyses to determine which variables were influential in explaining variation in species diversity and …
Bird Diversity And Abundance In Relation To Habitat Complexity At Jack Mountain Wildlife Management Area, Grace Tidwell
Bird Diversity And Abundance In Relation To Habitat Complexity At Jack Mountain Wildlife Management Area, Grace Tidwell
Honors Theses
Since 1973, North America has lost 2.9 billion birds due to habitat loss and fragmentation. To assess the effects of habitat complexity on bird diversity and abundance, 96 locations were surveyed at Jack Mountain Wildlife Management Area (WMA) using ten-minute point counts. All birds seen and heard at each point were documented, and habitat complexity was assessed by examining the percentage of ground coverage, shrub coverage, midstory tree layer, and canopy coverage at each point. A habitat complexity index was generated from these plant surveys. Previous research at Jack Mountain has shown that habitats dominated by pine trees had the …
Chronic Wasting Disease In Deer And Elk Herds In Arkansas, Baker Kendrick
Chronic Wasting Disease In Deer And Elk Herds In Arkansas, Baker Kendrick
Scholars Day Conference
This presentation gives a broad introduction to Chronic Wasting Disease. It goes over what the disease is and its history, symptoms, how it works on a molecular level, effects on the hunting industry, host range, management and regulation, transmission, treatment, and research.
Emergent Fungal Entomopathogen Does Not Alter Density Dependence In A Viral Competitor, Andrew M. Liebhold, Ruth Plymale, Joseph S. Elkinton, Ann E. Hajek
Emergent Fungal Entomopathogen Does Not Alter Density Dependence In A Viral Competitor, Andrew M. Liebhold, Ruth Plymale, Joseph S. Elkinton, Ann E. Hajek
Articles
Population cycles in forest Lepidoptera often result from recurring density-dependent epizootics of entomopathogens. While these systems are typically dominated by a single pathogen species, insects are often infected by multiple pathogens, yet little is known how pathogens interact to affect host dynamics. The apparent invasion of northeastern North America by the fungal entomopathogen Entomophaga maimaiga some time prior to 1989 provides a unique opportunity to evaluate such interactions. Prior to the arrival of E. maimaga, the oscillatory dynamics of host gypsy moth, Lymantria dispar, populations were apparently driven by epizootics of a nucleopolyhedrovirus. Subsequent to its emergence, E. …
Comparing Two Methods For Quantifying Soil-Borne Entomophaga Maimaiga Resting Spores, Ann E. Hajek, Ruth C. Plymale, James R. Reilly
Comparing Two Methods For Quantifying Soil-Borne Entomophaga Maimaiga Resting Spores, Ann E. Hajek, Ruth C. Plymale, James R. Reilly
Articles
To improve usability of methods for quantifying environmentally persistent entomophthoralean resting spores in soil, we modified and tested two methods using resting spores (azygospores) of the gypsy moth pathogen Entomophaga maimaiga. Both methods were effective for recovering resting spores at concentrations >100 resting spores/g dry soil. While a modification of a method originally described by Weseloh and Andreadis (2002) recovered more resting spores than a modified method based on Percoll density gradients, the ability to estimate true densities from counts was similar for both methods. Regression equations are provided for predicting true resting spore densities from counts, with R 2 …
Plant-Mediated Alteration Of The Peritrophic Matrix And Baculovirus Infection In Lepidopteran Larvae, Ruth C. Plymale, Michael J. Grove, Diana Cox-Foster, Nancy Ostiguy, Kelli Hoover
Plant-Mediated Alteration Of The Peritrophic Matrix And Baculovirus Infection In Lepidopteran Larvae, Ruth C. Plymale, Michael J. Grove, Diana Cox-Foster, Nancy Ostiguy, Kelli Hoover
Articles
The peritrophic matrix (PM) lines the midgut of most insects, providing protection to the midgut epithelial cells while permitting passage of nutrients and water. Herein, we provide evidence that plant-mediated alteration of the PM contributes to the well-documented inhibition of fatal infection by Autographa californica multiple nucleopolyhedrovirus (AcMNPV) of Heliothis virescens F. larvae fed cotton foliage. We examined the impact of the PM on pathogenesis using a viral construct expressing a reporter gene (AcMNPV-hsp70/ lacZ) orally inoculated into larvae with either intact PMs or PMs disrupted by Trichoplusia ni granulovirus occlusion bodies containing enhancin, known to degrade insect intestinal mucin. …