Samford University

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Faculty Mentors

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Kristin A. Bakkegard, Ph.D.

kbakkega@samford.edu
Field Herpetology, Entomology
Oak Mountain State Park (OMSP) has a rich and relatively unstudied herpetological fauna, a rich community of arthropods, and a variety of natural and manmade landscapes characteristic of the ridge and valley physiographic region. My research interests include the ecology, behavior and natural history of salamanders, including the Red Hills Salamander (Phaeognathus hubrichti), body size and sexual size dimorphism in dusky salamanders, and the presence, in Alabama, of Batrachochytrium dendrobatidis (Bd), a fungal pathogen that has devastated many amphibian populations. I am also interested in the aquatic and semi-aquatic turtles found in OMSP and the relationship between arthropod communities and habitat. All projects will involve a significant field component but no projects will involve the handling of venomous snakes. The student should be ready for daily outdoor work, some of which will be physically strenuous, in hot and humid conditions.

Dr. Bakkegard's Bio
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Betsy Dobbins, Ph.D.

egdobbin@samford.edu
Environmental Science, Aquatic insects, Cell culture
Human are imbedded in the environments that surround us. My research focuses on two aspects of these entwined relationships: 1) using small bottom-dwelling macroinvertebrates as bioindicators of the health of creeks and rivers and 2) evaluating native plants for bioactive terpenoids that reduce cancer cell growth in culture.

Oak Mountain State Park provides an exciting laboratory for students. Students who would like getting wet and learning the joys of insect identification would happily characterize the biodiversity of creeks in the upland, lowland, and golf course areas of the Park. Students working with medicinal plants indigenous to Oak Mountain would initially collect and identify plants, but most of the work would be in the laboratory performing solid phase extraction, maintaining a line of cancer cells in culture, and exploring the effects of the bioactive extracts on apoptosis in the cancer cells.

Dr. Dobbins' Bio
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Scot Duncan, Ph.D.

 

http://faculty.bsc.edu/sduncan/

 Longleaf pine forests occur on the ridges and foothills within Oak Mountain State Park. These forests are remnants of a formerly vast expanse of longleaf pine forest that stretched across the southeastern United States. Once covering 60-90 million acres in the south (by comparison, Alabama is 33.5 million acres), longleaf forests are now reduced to roughly 3 million acres. The southeastern longleaf pine forests are the most species diverse forests in North America, harboring scores of plant and animal species not found elsewhere. Longleaf pine forests need periodic low-intensity fires to survive. The plants and animals that live in these forests have adaptations to survive these fires. Without fire, longleaf pine forests are supplanted by different forest types, and the flora and fauna associated with longleaf community cannot survive. Oak Mountain State Park harbors hundreds of acres of mountain longleaf pine forest. Most stands of longleaf in the park have not had a fire in 30+ years. Fortunately, Alabama State Parks is committed to using prescribed fire to manage these forests in order to maintain and restore the longleaf communities in the park.

I have several research projects to aid longleaf pine forest conservation in the park. We monitoring how the longleaf community is responding to various fire treatments (e.g., prescribed fires, wildfires, fire suppression). We are also assessing the status of the bird community typically associated with longleaf pine forests, including the endangered Red-cockaded Woodpecker (Picoides borealis).

Dr. Duncan's Website
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Malia Fincher, Ph.D.

rmfinche@samford.edu
Plant-Insect Interactions, Chemical Ecology, Physiological Ecology
My research is focused on the ecology of the mixed hardwood forest at Oak Mountain State Park. I am interested in the effects of plant chemistry, plant physiology, insect seed predators, deer browsing, drought, and fire suppression on oak dynamics. Student projects may involve field or laboratory research, and could address deer browsing, plant community ecology, plant physiology, or chemical ecology. All of these potential projects would contribute to the ongoing forest management efforts in the park and may result in policy modifications. Students will gain experience in designing experiments, field experimental techniques, gathering and analyzing data, navigating the literature, and presenting and defending the results of their research.
Dr. Fincher's website
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Grant Gentry

ggentry@samford.edu
Ecology, Environmental Science
My research is informed by basic life history, behavioral information, and characterizations of species interactions. I use this data to determine how the morphological, physiological, and behavioral characters of organisms within a multitrophic system affect their ecology, and evolution. This life history based approach, augmented by experiments or correlational analyses, allows me to search for patterns of interactions in communities and use them to increase understanding of larger ecological and evolutionary concepts.
Currently, using Oak Mountain as a rural sampling area, I am taking inventories of lepidopteran faunas along an urban-rural gradient to determine how increasing urbanization affects the diversity of Lepidoptera. I also seek to determine how the size of a natural area such as an urban park, or characteristics of the surrounding matrix of commercial or residential development can offset effects of urbanization on Lepidopteran diversity.
Dr. Gentry's bio
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Denise Gregory, Ph.D.

djgregor@samford.edu
Organic Chemistry
Bioremediation technology: Oak Mountain’s Fungus to degrade 17-α-Ethinylestradiol
The presence of 17-α-Ethinylestradiol (EE2), a synthetic estrogen, in the environment causes harmful effects on the ecosystems around wastewater. Certain strands of fungi degrade complex molecules such as Bisphenol A and lignin. Previous studies in our lab have shown that Lentinula edodes and Phanerochaete chrysosporium degrade EE2. Both fungi have lignolytic enzymes that are important in the degreadation process. Lentinula edodes contain the enzymes lignin peroxidase, manganese peroxidase and lacasse that are important in the degradation process. P. chrysosporium, in contrast, contains very little or no lacasse enzyme. Prelimary results suggest that EE2 degradation is significantly slower in P. chrysosporium than L. edodes. This summer we will collect diverse fungal samples from Oak Mountain State Park. These samples will be identified and then subjected to similar degradation protocols as the previous fungi tested. This process is monitored over time using LC-MS. If time permits we will identify the degradation products and their level of estrogenic activity.
Dr. Gregory's bio
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Drew Hataway, Ph.D.

rahatawa@samford.edu
Population Genetics, Ecology
The current genetic variation and levels of migration or a wolf spider in a human shaped habitat
Fire suppression and anthropogenic development shape the current composition and structure of our temperate pine – deciduous hardwood forests across the southeastern United States. As succession of the forest is altered so is the habitat of endemics. The wolf spider Rabidosa rabida requires open grasslands near forests that are created and lost through succession. The halted succession within OMSP, as well as the maintained grass corridors along roadways, has potentially restructured R. rabida.
Students may design research projects in which they will collect individuals from across the entirety of the park for genotyping. Working in my lab students would extract, quantify, and amplify DNA from each of the individuals for subsequent analysis and inquiry into the effects of current management policy. Long-term experimental plots would be created monitored for founding events in what is expected to be open habitat for exploitation in the meta-population.
Dr. Hataway's bio
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Corey M. Johnson, Ph.D.

cjohnso9@samford.edu
Enzymology, Chemical Biology
Dr. Johnson is a protein biochemist with a focus in enzymology. Enzymes are fascinating biological catalysts and often the target of designed therapeutics. Research projects in the Johnson lab are directed toward the functional characterization of enzymes through kinetic and mechanistic studies. Another area of interest in the Johnson lab is developing new chemical biology tools for functionally characterizing enzymes inside cells and tissues. Oak Mountain is a rich source of fungal material. Dr. Johnson’s potential project will be characterizing enzymes necessary for Lysine biosynthesis in Oak Mountain fungi. Seven enzymes participate in the alpha-aminoadipate pathway, which is unique to fungi. This research will provide mechanistic descriptions of this distinct metabolic pathway. The research projects will allow students to experience a broad spectrum of essential laboratory techniques, including recombinant DNA and molecular biology techniques, protein expression and purification techniques and enzyme assays.
Dr. Johnson's bio
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David Johnson

djohnso2@samford.edu
Genetics, Molecular Biology
Using DNA to Investigate Ciliates found at Oak Mountain State Park
Here's your chance to gain a variety of hands-on experience in modern biological analysis--everything from the field collection of single-celled organisms to isolation of their DNA to amplification a specific segment to cloning of the segment into bacteria to sequencing it to analysis the sequence. In this project, you will choose a freshwater site at Oak Mountain State Park and use molecular biological methodology to identify the ciliates present in those waters. This will involve two protocols: direct isolation of DNA from environmental water samples and culturing live ciliates. In addition to this project, you will be involved in the search for new endosymbiotic bacteria in these local ciliates. Ciliates are known to harbor such bacteria that have taken up residence in the ciliate in a commensalistic or mutualistic symbiotic relationship. An understanding of endosymbiosis like this is key to understanding the early evolutionary history of eukaryotes, since organelles like mitochondria and chloroplasts are believed to have originated by endosymbiosis.
Dr. Johnson's website
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Mary Anne Sahawneh

I am interested in investigating the potential effects of plant extracts on cells in culture.  This project will include the collection of plants indigenous to Oak Mountain, the extraction of bioactive compounds from those plants and subsequent treatment of cell lines in culture with the extracted compound. Following the treatment with the extracted compound, you will run experiments in the laboratory to determine the protective or toxic effect of the compound in question using a wide variety of laboratory techniques.  These techniques will help us to determine the trophic effects of the compound as well as which cell pathways are activated following treatment. This project will be ideal for someone who is interested in working in the laboratory learning cell culture techniques for growing, harvesting and processing cells for use in Western blot, PCR, immunocytochemistry, ELISA assays, etc.
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Pete Van Zandt, Ph.D.

 

pvanzand@bsc.edu

I am a community ecologist, with interest in insect herbivores and their interactions with plants, as well as the effects of urbanization on Lepidopteran insects. The Lepidoptera (which are overwhelmingly made up of moths) are incredibly common and diverse. They play crucial roles in ecosystems as herbivores, prey, pollinators, and detritivores. They are also strongly influenced by several environmental variables, such as habitat quality and size, the nature of the surrounding habitat, and temperature. I have been working with several collaborators to better understand the ways that habitat and other environmental factors affect diverse communities of moths. The questions we’ve been working on include: How do communities of moths change as the landscape becomes more urbanized? Do moths in urban woodlots emerge earlier because cities are warmer than rural areas? 

Dr. Van Zandt's Website
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