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Principal Investigators

l dwayne estes standing in field

Dwayne Estes

Professor/PI,  Herbarium Curator

Ph.D. – University of Tennessee (2008)

B.S. – Middle Tennessee State University (2003) 

Areas of expertise:
Systematics and biogeography of vascular plants; inventories of vascular plants; threatened and endangered species; wetland flora; vegetation / plant communities of Tennessee.


Phone: (931) 221-7771

C.M. Gienger

C.M. Gienger

Professor/PI, Curator of Herpetology in the David H. Snyder Museum of Zoology

Ph.D. - University of Nevada, Reno (2009)
M.S. - University of Nevada, Reno (2003)

Areas of expertise: Ecology and physiology of amphibians and reptiles


(931) 221-7076
johansen photo

Rebecca Blanton Johansen

Professor/PI, Curator of Fishes for David Snyder Museum of Zoology

Ph.D. – Tulane University (2007)

M.S. – Eastern Kentucky University (2001)

Areas of expertise: Systematics, phylogeography, conservation, and population genetics of freshwater fishes; inventories of aquatic fauna and assessments of water and habitat quality using indicator species.



Phone: (931) 221-6372

rogers headshot

Michelle Rogers

Instructor/State Coordinator WET

M.S. - University of Tennessee (2000)

Areas of expertise: Environmental Science Project Manager 


Phone: (931) 221-6480

stefan woltmann

Stefan Woltmann

Interm Director of CEFB

Professor and PI

Ph.D. Tulane University (Ecology and Evolutionary Biology), 2010
M.S. University of Southern Mississippi (Biology), 2000
B.A. State University of New York, Purchase (Environmental Science) 1993 

Areas of expertise: Avian Dispersal, Conservation Genetics, Conservation Biology, Neotropical Bird Ecology, Bird Migration 


Phone: (931) 221-7772