MAERZ LAB @ UGA

Meet the lab

  • About
  • People
    • Alumni
  • Research
    • Why we study amphibians
    • Why we study salamanders
    • Why we study turtles
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Principal Investigator


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Dr. John C. Maerz
​Dennis and Sara Carey Distinguished Professor of Forestry and Natural Resources &
​Josiah Meigs Distinguished Teaching Professor
John Maerz is the Dennis and Sarah Carey Distinguished Professor of Forestry and Natural Resources and a Josiah Meigs Distinguished Teaching Professor in the Warnell School of Forestry and Natural Resources . He is affiliated with the Center for Integrative Conservation Research's Integrative Conservation Ph.D. Program (ICON) and is adjunct faculty in the Odum School of Ecology. He joined the UGA faculty in 2005. He teaches undergraduate courses in Animal Behavior, Herpetology, Natural Sciences Research, Sustaining Human Societies and the Natural Environment (in New Zealand and Australia), and graduate courses in Principles of Fisheries and Wildlife Management, professional writing (aka Write Club), and Developing University Teaching Skills.

Learn more about John, his research and the courses he teaches​

Senior Research Staff


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Vanessa Terrell
Research Professional III and Coordinator
Vanessa Terrell is the joint Research Coordinator for the Maerz and Castleberry Labs within the Warnell School of Forestry and Natural Resources.  Vanessa is a graduate of UGA and worked in the lab for 1 year on projects including our work on invasive plant impacts on amphibians, the status of the southern dusky salamander, and the effects of residential development on stream salamander communities. She received her masters degree from Indiana State University where she studied crawfish frog ecology and management with Dr. Michael Lannoo.  In addition to coordinating most lab research, Vanessa supervises our gopher frog ecology and captive rearing project.

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Jade Samples
Research Professional

Jade Samples is a research professional. In addition to supporting multiple long-term projects in our lab including our long-term work on wetland restoration and landscape management for priority amphibians, Jade is developing decision support tools to aide GDOT planning to improve passage and reduce the impact of roads on priority wildlife. Jade received her bachelor's degree in Fisheries and Wildlife and her master's degree in Wildlife Sciences from the Warnell School of Forestry and Natural Resources. After receiving her bachelor's degree, jade worked as technician for Georgia DNR conducting Gopher tortoise surveys, she led the field teams for our two-year study of Hemlock management effects on Appalachian salamander populations, and she did a stint leading backcountry field crews for the USFS in Oregon. For her masters research, Jade studied amphibian community responses to wetland conditions across multiple managed landscapes to guide restoration decision making. She also followed the work of Dr. Corrie Navis by testing translocation success of Striped newts introduced into restored wetlands. As a graduate student, Jade received UGA's Outstanding Teaching Assistant Award for her contributions to Animal Behavior and she now serves as an instructor for the Discover Abroad Green Cohort Program to New Zealand and Australia.

Affiliated Investigators


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​Dr. Cyndi Carter

Lecturer
Dr. Carter is a faculty lecturer in the wildlife program at the University of Georgia. She developed and teaches the core major course in Wildlife Science and also teaches Herpetology, Natural History of Georgia, Natural Resources Ecology and Management, and a joint study abroad course in New Zealand and Australia. Dr. Carter also mentors undergraduates in Senior Thesis research, supports capstone Senior Projects, and co-advises the Herpetological Society. Dr. Carter received her Ph.D. in 2023 from Warnell  studying the evolutionary ecology of salamanders in relation to climate including how natural hybrid zones may contribute to the future responses of salamander populations to climate change. She received her B.Sc. in Ecology from UGA in 2013 and her masters from Eastern Illinois University in 2015. Her undergraduate research examined long-term changes in snake communities in the southwestern U.S. and she dabbled in some road ecology of Gila monsters. Her masters research used stable isotopes to study prey use ontogeny and overlap among species of aquatic snakes.

PhD Students


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Anuja Mital
​Ph.D. Student, ICON
Anuja Mital is a Ph.D. student through the Integrated Conservation (ICON) program, and is co-supervised by Drs. John Maerz and Krista Capps. She completed a Masters in Wildlife Biology in 2016 in India studying the community ecology and resource partitioning of freshwater turtles in the Ganges river basin. She has also documented freshwater turtle populations across the Brahmaputra river in NE India. Her interests include population ecology of aquatic reptiles, the hydrology and flooding of large rivers, and freshwater habitat management alongside conservation education and outreach. She is also the co-founder of 'Freshwater Turtles and Tortoises of India', a citizen-science initiative to increase awareness and research on this taxa in India.

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​​Eva Kerr
Ph.D. Student, Wildlife Sciences

Eva Kerr is a Ph.D. in Wildlife Sciences within the Warnell School of Forestry and Natural Resources. Eva finished her masters in Wildlife Science in 2025. For her Ph.D. research, Eva is working on advancing the use of landscape genetic and modeling techniques to improve the management of landscapes for threatened amphibians and reptiles. For her master's, Eva used landscape genetics, occupancy models, and agent-based models to describe the population ecology of gopher frogs on two managed landscapes in Georgia. Eva also receive the 2025 Warnell School Outstanding Teaching Assistant Award. Eva received her bachelor's degrees in Biology and Environmental Science and a minor in Mathematics from Allegheny College where she was also a four-year varsity athlete and captain of the track team. She has worked with middle school students on stream ecology and TA'd courses on animal behavior and scientific writing. She has also conducted fieldwork on Arizona tree frogs in the Mims Lab at Virginia Tech and on Arizona tiger salamanders at the Rocky Mountain Biological Laboratory.

Masters Students

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Maddisyn Braun
​M.Sc. Student, Wildlife Sciences

Maddisyn is an incoming master’s student in Wildlife Sciences within the Warnell School of Forestry and Natural Resources. She earned her bachelor’s degree in biology and classical archaeology from the University of North Carolina, where her research included studies of amphibian hybridization and extinction risk, mate-choice behavior in spadefoot toads, and long-term telemetry of eastern box turtles. She has also worked as an assistant curator of reptiles, amphibians, and ambassador animals at the NC Museum of Natural Sciences, as well as a technician conducting spotted turtle surveys with NC State University. As a graduate student, Maddisyn is investigating hybridization among salamanders in the Appalachian Mountains.

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Hadley Copeland
​M.Sc. Student, Wildlife Sciences
Hadley is an M.Sc. student in the Warnell School of Forestry and Natural Resources and she works in the veterinary pathology lab at the University of Georgia. Hadley has a breadth of experiences in wildlife ecology and conservation and working on human impacts and health of aquatic ecosystems. Hadley is broadly interested research that helps improve the management of ecosystems for people and wildlife and is working toward a longer term career in science based extension work. For her masters research, Hadley is evaluating whether imidacloprid use to conserve Eastern hemlocks has subacute affects on the brains and behavior of larval and juvenile stream salamanders.

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Bianca Marcelletti
​M.Sc. Student, Wildlife Science

Bianca is an incoming master's student in Wildlife Sciences within the Warnell School of Forestry and Natural Resources. Bianca is conducting a pilot study using accelerometers to monitor and quantify gopher tortoise behavior, particularly in shallow soils in the Southern Coastal Plain. Bianca received a bachelor's degree in Wildlife Ecology and Conservation from the University of Florida in 2021 and has since worked as a technician with Tall Timbers in Central Florida, assisting primarily in research on northern bobwhites and gopher tortoises.
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Cassandra Waldrop

​M.Sc. Student, Wildlife Science
Cassandra Waldrop is the Research Coordinator for Dr. Elizabeth McCarty in the Forest Health Lab and a masters student in Wildlife Sciences within in Warnell School of Forestry and Natural Resources. Cassandra received her bachelor's degree in Fisheries and Wildlife. For her masters research, she is studying the effects of imidaclropid use on stream salamander aquatic abundance and prey availability. Cassandra is also an avid naturalist and talented wildlife painter.

Undergraduate Students

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Rachael Bryson
Fisheries and Wildlife, 2026

Rachael Bryson is a fourth year Fisheries and Wildlife major in the Warnell School of Forestry and Natural Resources. Since her third year at UGA, Rachael has assisted in several research projects, most notably assisting master’s student Hadley Copeland with her research on subchronic effects of imidacloprid on larval salamander behavior. For her senior thesis research, Rachael quantifying the effects of imidacloprid on foraging behaviors and success of larval blackbelly and two-lined salamanders. Rachael hopes her work will help forest managers make decisions about the use of imidacloprid to save hemlocks in areas where there might be non target effects on sensitive species. After graduation, Rachael hopes to find a position that allows her to explore her love for field work and science communication. Then, if the stars align, she would love to come back after a few years and pursue a master’s degree in Warnell.

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​Paul Hassel
Fisheries and Wildlife, 2026
Paul Hassel is Fisheries and Wildlife major with an emphasis in Wildlife Sciences in the Warnell School of Forestry and Natural Resources. Paul is deeply engaged in many aspects of research within the Maerz Lab. Paul has also worked as a technician on the GA DNR gopher tortoise crew, and contributed to a variety of herpetological research and monitoring efforts across the southeastern United States. For his senior thesis research, Paul is using commensal species detected during gopher tortoise surveys to evaluate whether actions are leading to increased commonness of priority and other wildlife on a landscape undergoing restoration. He is using  pre- and post-restoration survey data to test his hypotheses. Paul's broader interest are to work in applied wildlife conservation, habitat restoration, and using field based data to inform management decisions on amphibians and reptiles.

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​Carter Mason
Fisheries and Wildlife, Pre-Veterinary Sciences, 2026
Carter is a Fisheries and Wildlife major with a focus on pre-veterinary science in the Warnell School of Forestry and Natural Resources. He is currently in his final semester at Warnell and is completing a senior project advised by Drs. Carter and Maerz that focuses on developing a snake management plan for Gwinnett County Parks. Carter also serves as President of the UGA Chapter of The Wildlife Society and is a Warnell Ambassador. After graduation, Carter plans to attend the University of Georgia College of Veterinary Medicine or pursue opportunities in conservation, wildlife management, and related wildlife focused fields.

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Kat Maupin
Fisheries and Wildlife, 2026

Kat is ...

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Erin Monroe
Fisheries and Wildlife, 2026

Erin is ...

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Charlotte Walters
Fisheries and Wildlife, 2026

Charlotte is ...

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Hayes Valentine
Fisheries and Wildlife, 2026

Hayes ...

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Javier Medina Rivera
Fisheries and Wildlife, 2026
Javi is a Fisheries and Wildlife major with a focus on Wildlife Sciences in the Warnell School of Forestry and Natural Resources. He is currently in his last semester at Warnell and is part of a senior project advised by Drs. Carter and Maerz to develop a snake management plan for Gwinnett County Parks. Javi is also the outreach coordinator for the UGA Herpetological Society and a Warnell Ambassador. After he graduates, Javi plans to explore opportunities in environmental education, wildlife management, and wildlife research.

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​Auggie Smith

Fisheries and Wildlife, 2026
Auggie ...

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​Jae Lieberman

Fisheries and Wildlife, 2026

Jae ...

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​Melissa Garcia Chavarria
Fisheries and Wildlife, 2026

Melissa ...
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  • About
  • People
    • Alumni
  • Research
    • Why we study amphibians
    • Why we study salamanders
    • Why we study turtles
    • Publications
  • Contact