My research interests center on the impacts of aquatic and terrestrial habitat quality (at local and landscape scales) on pond-breeding amphibians and freshwater turtles--two of the most endangered vertebrate taxa worldwide. I have used a wide range of methods---from molecular analyses and small-scale behavioral studies to large, landscape-scale field experiments---to study the ecological implications of habitat alteration for herpetofauna.
Current projects stem from long-term monitoring of salamanders and freshwater turtles in southern New Hampshire, as well as networked research through the NSF-funded Ecological Research as Education Network (EREN).
Past research includes: the effects of landscape composition on the genetic population structure of salamanders; the importance of aquatic vegetation structure in mediating biotic interactions of pond-breeding amphibians; differential growth, locomotor performance, and survival of amphibians through multiple life stages; and the importance of wetland hydroperiod and upland forest buffers for the health of vernal pool-breeding amphibian communities. By observing how populations and communities respond along environmental gradients (e.g., hydroperiod, canopy cover, urbanization), and in the presence of multiple stressors (e.g., predation pressure, pesticide exposure), we can: (1) deepen our understanding of how systems function; (2) make predictions about how communities will respond to future environmental alterations caused by global climate change and changes in land use; and (3) inform ongoing conservation efforts.
Ph.D., Zoology, Miami University - Ohio
M.S., Biology, University of Akron
B.S., Wildlife Ecology; Biological Aspects of Conservation, University of Wisconsin
Certificate, Postsecondary Education, University of Akron
Wildlife & Habitat Management/Conservation
BMS 799H: Senior Honors Thesis
LSA 401: Scientific Resrch Exploration
NR 417: Soph Seminar: Wildlife Bio
NR 435: Contemporary Conservatn Issues
NR 435/435H: Contemporary Conservatn Issues
NR 435H: Honors/Contemp Conservatn Iss
NR 444F: Does Extinction Matter?
NR 650: Principles Conservatn Biology
NR 740/840: Inventory &Montoring Ecol Comm
Hettinger, A., Merkle, B. G., Schwarz, K., Bayer, S., Whalen, E., & Purrenhage, J. (2020). Human Dimensions: Communication and Engagement, Where Ecology and Human Dimensions Meet. The Bulletin of the Ecological Society of America, 101(1). doi:10.1002/bes2.1641
Thomas, S., Purrenhage, J. L., Foster, A., Loucek, J., Roeder, A., Branch, T. L., . . . Niewiarowski, P. H. (2019). Spotted salamander (Ambystoma maculatum) breeding population structure and dynamics across 20 years at a northeastern Ohio pond. In INTEGRATIVE AND COMPARATIVE BIOLOGY Vol. 59 (pp. E230). Retrieved from http://gateway.webofknowledge.com/
Davis, M. J., Purrenhage, J. L., & Boone, M. D. (2012). Elucidating Predator-Prey Interactions Using Aquatic Microcosms: Complex Effects of a Crayfish Predator, Vegetation, and Atrazine on Tadpole Survival and Behavior. JOURNAL OF HERPETOLOGY, 46(4), 527-534. doi:10.1670/10-185
Freidenfelds, N. A., Purrenhage, J. L., & Babbitt, K. J. (2011). The effects of clearcuts and forest buffer size on post-breeding emigration of adult wood frogs (Lithobates sylvaticus). FOREST ECOLOGY AND MANAGEMENT, 261(11), 2115-2122. doi:10.1016/j.foreco.2011.03.005
Greenwald, K. R., Purrenhage, J. L., & Savage, W. K. (2009). Landcover predicts isolation in Ambystoma salamanders across region and species. BIOLOGICAL CONSERVATION, 142(11), 2493-2500. doi:10.1016/j.biocon.2009.05.021
Purrenhage, J. L., & Boone, M. D. (2009). AMPHIBIAN COMMUNITY RESPONSE TO VARIATION IN HABITAT STRUCTURE AND COMPETITOR DENSITY. HERPETOLOGICA, 65(1), 14-30. doi:10.1655/08-017R1.1
Purrenhage, J. L., Niewiarowski, P. H., & Moore, F. B. -G. (2009). Population structure of spotted salamanders (Ambystoma maculatum) in a fragmented landscape. MOLECULAR ECOLOGY, 18(2), 235-247. doi:10.1111/j.1365-294X.2008.04024.x
Purrenhage, J. L., & Boone, M. D. (2005). Effects of habitat structure and competition on larval amphibian development. In INTEGRATIVE AND COMPARATIVE BIOLOGY Vol. 45 (pp. 1180). Retrieved from http://gateway.webofknowledge.com/
Purrenhage, J. L., Niewiarowski, P. H., Moore, F. B. G., & Zamudio, K. R. (2004). Regional population dynamics of spotted salamanders (Ambystoma maculatum) in a fragmented landscape. In INTEGRATIVE AND COMPARATIVE BIOLOGY Vol. 44 (pp. 626). Retrieved from http://gateway.webofknowledge.com/