Fitzpatrick Lab



Ben Fitzpatrick  Assistant Professor of Ecology and Evolutionary Biology
Population Genetics, Conservation Biology, Vertebrate Biology

  My major interests are in the genetics and biogeography of speciation, the importance of local adaptation for both evolution and conservation management, and invasion biology. I encourage graduate students to develop their own research questions, which may involve my primary study organisms (salamanders) or not.
Dept. of EEB        My Publications
Stesha Pasachnik  PhD Student
Genetics and Conservation of Ctenosaura in Mesoamerica

  Ctenosaurs are threatened by habitat destruction, over-harvesting, and lack any real form of protection. To address the high level of intra-generic diversity within this clade I plan to conduct a three-fold molecular evaluation of the ctenosaurs along the Caribbean borders and islands of Honduras, an area of high endemism.
My Webpage

Matt Niemiller  PhD Student
Systematics, Phylogeography, and Population Genetics of the Plethodontid Salamander Genus Gyrinophilus and the Southern Cave Fish (Typhlichthys subterraneus).

My Web Site        My Publications
R. Graham Reynolds  PhD Student
Conservation Genetics, Biogeography, and Phylogeography of tropical and subtropical reptiles and amphibians, especially insular populations.

  I am currently investigating the effects of island physical geography on population level genetic structuring of the insular genus Leiocephalus. I am also interested in studying basic biology and spatial ecology of the Bahamian Boas ( Epicrates , see photo), with an eye towards conservation and local community involvement in management. My current work is with L. psammodromus and E. chrysogaster in the Turks and Caicos Islands, British West Indies.

My Web Site       My Publications

  J.R. Jones  Masters Student
Phenotypic polymorphism, resource partitioning, trophic/dietary ecology, behavioral ecology, chemical cues in vertebrates, sexual selection, thermal ecology, population genetics, effects of invasive species on local communities.

  My current research involves investigation of the widespread phenomenon of similar color polymorphism in salamanders of the genus Plethodon. I am examining spatial and temporal trends in morph frequencies in two species (P. serratus and P. ventralis) to either support or refute Highton’s claim of character displacement between these two species in eastern Tennessee. I am also exploring the possibility of resource partitioning (through examination of dietary composition) and differences in territorial behavior in both sympatric and allopatric populations of the two.

Dylan Dittrich-Reed  PhD Student
Comparative Phylogenetics, Conservation, and Salamanders.


Megan Todd-Thompson  Masters Student
Disease Ecology and Population Genetics

  My current research aims to better understand Ranavirus in salamanders. I plan to examine genetic variation of ranavirus strains across watersheds to understand how the virus is moving through populations.



Affiliated Lab Members

Fordyce Lab
Plant-animal interactions, evolutionary ecology, population / community ecology, chemical ecology, and biogeography
James Fordyce  Assistant Professor of Ecology and Evolutionary Biology
Plant-animal interactions, evolutionary ecology, population / community ecology, chemical ecology, and biogeography



My Web Site
Darrin Hulsey  Assistant Professor of Ecology and Evolutionary Biology
Evolution of complex phenotypes, functional morphology, evolution of development, trophic evolution, phylogenetics, and ichthyology



My Web Site
Premal Shah  PhD Student
Molecular Evolution, Memetics, RNA Thermometers, Stability vs. Complexity, Social Networks.

   I am currently building and using models of translation to understand the impact of selection and drift on the evolution of DNA sequences. I am also working on a neutral model of cultural evolution to understand how ideas spread, compete and then eventually become memories of the past generation (i.e., die off).

My Web Site
Sarah Duncan  Masters Student
  The major focus of my research is a molecular genetic investigation into variation in social behavior phenotypes, particularly in the social spider, Anelosimus studiosus.
Jason Robinson  PhD Student
Lisa McDonald  PhD Student
  My dissertation research focuses on the way in which plant cardenolide chemistry influences the arthropod community of Apocynum cannabinum, Apocynum androsaemifolium, and their putative hybrid, Apocynum x floribundum. I am particularly interested in the specialist herbivores that feed on these toxic plants and sequester cardenolides from them for their own defense.
My Web Site
Kerry Hansknecht  PhD Student
Ecological aspects of foraging behavior of semiaquatic snakes

  For my Ph.D. research, I am examining geographic variation and stimulus control of prey luring by Saltmarsh Snakes, Nerodia clarkii. I seek to determine the relative importance of chemical, visual, and mechanical cues in eliciting luring behavior. I also wish to discover whether or not habitat complexity, prey density, and prey proximity affect snakes' tendency to lure. A more long-term goal involves quantifying the effectiveness of prey luring by these and other snakes.
My Web Site


Past Lab Members

John Placyk  Post-Doc - now Assistant Professor of Biology at University of Texas at Tyler
   My most recent research has focused on the molecular phylogeography of organisms, especially in the Great Lakes region, and on conservation genetics. We are focusing on differences between populations of Butler's gartersnake (T. butleri)using mtDNA, nuclear DNA, and morphological and behavioral data, to help us better understand relationships between populations, and relationships between T. butleri and the plains gartersnake (T. radix) with which it is known to hybridize.
    In the Fitzpatrick lab, I worked on understanding relationships between the endangered California tiger salamander (Ambystoma californiense) and the invasive barred tiger salamander (Ambystoma tigrinum mavortium) that is hybridizing with it in an attempt to help conservation efforts and to better understand hybrid fitness.
My Webpage

Tze Ping Heah  Undergraduate
Andrea Moodhart  Undergraduate
Amphibian demographics at Kyker Bottoms
Wildlife Management Area, Blount County, TN.
  I worked on a project monitoring amphibian populations weekly among three habitat types using pitfall traps and breeding call surveys. I will compare results from my study among these habitat types and with an identical concurrent study at Seven Islands Wildlife Refuge (Knox County).    My Web Site
2007 All images are the property of R. Graham Reynolds and Matt Niemiller