Jackie is a population ecologist focusing on management of invasive species and conservation of imperiled amphibian and reptile species in dynamic landscapes. Often her research examines semi-aquatic amphibian and reptile responses to land-use and hydrologic change along with quantification of survival, recruitment and movement behaviors.
Before joining USGS, Jackie's research focused on modeling landscape-scale variation in semi-aquatic herpetofaunal community responses to forest disturbance, including damming and clearcut harvesting.
Education and Certifications
PhD, Biology, University of Arkansas, 2019
MS, Biology, University of South Florida, 2010
BS, Biology, University of Tampa, 2005
Science and Products
Increased growth rates of stream salamanders following forest harvesting
Timber harvesting can influence headwater streams by altering stream productivity, with cascading effects on the food web and predators within, including stream salamanders. Although studies have examined shifts in salamander occupancy or abundance following timber harvest, few examine sublethal effects such as changes in growth and demography. To examine the effect of upland harvesting on growth
Drivers of realized satellite tracking duration in marine turtles
BackgroundSatellite tags have revolutionized our understanding of marine animal movements. However, tags may stop transmitting for many reasons and little research has rigorously examined tag failure. Using a long-term, large-scale, multi-species dataset, we evaluated factors influencing tracking duration of satellite tags to inform study design for future tracking studies.MethodsWe leveraged data
Non-USGS Publications**
Halloran, K.M., Guzy, J.C., Homyack, J.A., and Willson, J.D. 2021. Effects of timber harvest on survival and movement of the Ouachita dusky salamander (Desmognathus brimleyorum) in a managed forest. Ecosphere 12(4): Article e03489.
Drayer, A.N., Guzy, J. C. and Price, S.J. 2020. Factors Influencing the Occupancy and Abundance of Streamside Salamander (Ambystoma barbouri) in Kentucky Streams. Journal of Herpetology. 54(3): 299-305.
Drayer, A.N., Guzy, J.C., Caro, R., and Price, S.J. 2020. Created wetlands managed for hydroperiod provide habitat for amphibians in Western Kentucky. Wetlands Ecology and Management. 28:543-558.
Guzy, J.C., Halloran, K.M., Thornton, J.E., Homyack, J.A, and Willson, J.D. 2019. Differential responses of amphibian and reptile assemblages to size of riparian buffers within managed forests. Ecological Applications. 29(8): e01995.
Guzy, J.C., Halloran, K.M., Homyack, J.A., and Willson, J.D. 2019. Influence of riparian buffers and habitat characteristics on salamander assemblages in headwater streams within managed forests. Forest Ecology and Management 432:868-883.
Guzy, J.C., Eskew, E.A., Halstead, B.J., and Price, S.J. 2018. Influence of damming on anuran species richness in riparian areas: A test of the serial discontinuity concept. Ecology and Evolution. 2018:00:1–12.
Baecher, J.A., Vogrinc, P.N., Guzy, J.C., Kross, C.S., and Willson, J.D. 2017. Herpetofaunal communities in restored and degraded unrestored remnant tallgrass prairie wetlands in northwest Arkansas, USA. Wetlands 38(1): 157-168.
Bush, C., Guzy, J.C., Halloran, K.C., Kross, C.B., Swartwout, M.C., and Willson, J.D. 2017. Distribution and Abundance of Introduced Seal Salamanders (Desmognathus monticola) in Northwest Arkansas, USA. Copeia 104(4): 680-690.
Kern, M.M, Guzy, J.C., Lovich, J.E., Gibbons, J.W., and Dorcas, M.E. 2016. Relationships of maternal body size and morphology with egg and clutch size in the diamondback terrapin, Malaclemys terrapin (Testudines: Emydidae). Biological Journal of the Linnean Society 117(2): 295–304.
Guzy, J.C., Price, S.J., and Dorcas, M.E. 2014. Using multiple methods to assess detection probabilities of riparian-zone anurans: implications for monitoring. Wildlife Research 41(3):243-257.
Witczak, L.R, Guzy, J.C., Price, S.J., and Dorcas, M.E. 2014. Temporal and spatial variation in survivorship of diamondback terrapins (Malaclemys terrapin). Chelonian Conservation and Biology 13(2):146-151.
Baecher, J.A., Vogrinc, P.N., Guzy, J.C., Neal, J.C., and Willson, J.D. 2014. Lithobates areolatus (crawfish frog) predation. Herpetological Review 45(4):61-682.
Guzy, J.C., Price, S.J., and Dorcas, M.E. 2013. The spatial configuration of greenspace affects semi-aquatic turtle occupancy and species richness in a suburban landscape. Landscape and Urban Planning 117:46-56.
Hunt, S.D., Guzy, J.C., Price, S.J., Halstead, B. J., Eskew, E.A., and Dorcas, M.E. 2013. Response of riparian reptile communities to anthropogenic habitat alteration. Biological Conservation 157:277-284.
Price, S.J., Guzy, J.C., and Dorcas, M.E. 2013. Do golf courses ponds provide suitable habitat for wetland-dependent animals in suburban areas? An assessment of turtle abundances. Journal of Herpetology 47(2):243-250.
Kern, M.M., Nassar, A.A., Guzy, J.C., and Dorcas, M.E. 2013. Oviposition Site Selection by Spotted Salamanders (Ambystoma maculatum) in an Isolated Wetland. Journal of Herpetology 47(3):445-449.
Underwood, E.B., Bowers, S. Guzy, J.C., Lovich, J.E., Taylor, C.A., Gibbons, J.W., and Dorcas, M.E. 2013. Sexual dimorphism and feeding ecology of diamondback terrapins (Malaclemys terrapin). Herpetologica 69(4):397-404.
Guzy, J.C., McCoy, E.D., Deyle, A.C., Halstead, N., Gonzalez, S.M., and Mushinsky, H.R. 2012. Urbanization interferes with the use of amphibians as indicators of ecological integrity in wetlands. Journal of Applied Ecology 49:941-952.
Kern, M.M., Guzy, J.C., Price, S.P., Hunt, S.D., Eskew, E.A., and Dorcas, M.E. 2012. Riparian-zone amphibians and reptiles within the Broad River Basin of South Carolina. Journal of the North Carolina Academy of Sciences 128:81-87.
Guzy, J.C., Campbell, T.S., and Campbell, K.R. 2006. Effects of hydrological alterations on frog and toad populations at Morris Bridge Wellfield, Hillsborough County, Florida. Florida Scientist 69(4):276-287.
Tracking durations for marine turtles satellite tagged in Gulf of Mexico and Caribbean sites, 2008-2019
This dataset contains tracking durations for several species of sea turtles tagged with satellite tags between 2008 and 2019. It contains information on species, turtle size, capture methods, tag type, how many days each tag transmitted, whether or not the tag was still attached upon recapture, fouling 'status' of the tag, and foraging region. This dataset thus allows estimation of tracking durati
Science and Products
- Publications
Increased growth rates of stream salamanders following forest harvesting
Timber harvesting can influence headwater streams by altering stream productivity, with cascading effects on the food web and predators within, including stream salamanders. Although studies have examined shifts in salamander occupancy or abundance following timber harvest, few examine sublethal effects such as changes in growth and demography. To examine the effect of upland harvesting on growthDrivers of realized satellite tracking duration in marine turtles
BackgroundSatellite tags have revolutionized our understanding of marine animal movements. However, tags may stop transmitting for many reasons and little research has rigorously examined tag failure. Using a long-term, large-scale, multi-species dataset, we evaluated factors influencing tracking duration of satellite tags to inform study design for future tracking studies.MethodsWe leveraged dataNon-USGS Publications**
Halloran, K.M., Guzy, J.C., Homyack, J.A., and Willson, J.D. 2021. Effects of timber harvest on survival and movement of the Ouachita dusky salamander (Desmognathus brimleyorum) in a managed forest. Ecosphere 12(4): Article e03489.Drayer, A.N., Guzy, J. C. and Price, S.J. 2020. Factors Influencing the Occupancy and Abundance of Streamside Salamander (Ambystoma barbouri) in Kentucky Streams. Journal of Herpetology. 54(3): 299-305.Drayer, A.N., Guzy, J.C., Caro, R., and Price, S.J. 2020. Created wetlands managed for hydroperiod provide habitat for amphibians in Western Kentucky. Wetlands Ecology and Management. 28:543-558.Guzy, J.C., Halloran, K.M., Thornton, J.E., Homyack, J.A, and Willson, J.D. 2019. Differential responses of amphibian and reptile assemblages to size of riparian buffers within managed forests. Ecological Applications. 29(8): e01995.Guzy, J.C., Halloran, K.M., Homyack, J.A., and Willson, J.D. 2019. Influence of riparian buffers and habitat characteristics on salamander assemblages in headwater streams within managed forests. Forest Ecology and Management 432:868-883.Guzy, J.C., Eskew, E.A., Halstead, B.J., and Price, S.J. 2018. Influence of damming on anuran species richness in riparian areas: A test of the serial discontinuity concept. Ecology and Evolution. 2018:00:1–12.Baecher, J.A., Vogrinc, P.N., Guzy, J.C., Kross, C.S., and Willson, J.D. 2017. Herpetofaunal communities in restored and degraded unrestored remnant tallgrass prairie wetlands in northwest Arkansas, USA. Wetlands 38(1): 157-168.Bush, C., Guzy, J.C., Halloran, K.C., Kross, C.B., Swartwout, M.C., and Willson, J.D. 2017. Distribution and Abundance of Introduced Seal Salamanders (Desmognathus monticola) in Northwest Arkansas, USA. Copeia 104(4): 680-690.Kern, M.M, Guzy, J.C., Lovich, J.E., Gibbons, J.W., and Dorcas, M.E. 2016. Relationships of maternal body size and morphology with egg and clutch size in the diamondback terrapin, Malaclemys terrapin (Testudines: Emydidae). Biological Journal of the Linnean Society 117(2): 295–304.Guzy, J.C., Price, S.J., and Dorcas, M.E. 2014. Using multiple methods to assess detection probabilities of riparian-zone anurans: implications for monitoring. Wildlife Research 41(3):243-257.Witczak, L.R, Guzy, J.C., Price, S.J., and Dorcas, M.E. 2014. Temporal and spatial variation in survivorship of diamondback terrapins (Malaclemys terrapin). Chelonian Conservation and Biology 13(2):146-151.Baecher, J.A., Vogrinc, P.N., Guzy, J.C., Neal, J.C., and Willson, J.D. 2014. Lithobates areolatus (crawfish frog) predation. Herpetological Review 45(4):61-682.Guzy, J.C., Price, S.J., and Dorcas, M.E. 2013. The spatial configuration of greenspace affects semi-aquatic turtle occupancy and species richness in a suburban landscape. Landscape and Urban Planning 117:46-56.Hunt, S.D., Guzy, J.C., Price, S.J., Halstead, B. J., Eskew, E.A., and Dorcas, M.E. 2013. Response of riparian reptile communities to anthropogenic habitat alteration. Biological Conservation 157:277-284.Price, S.J., Guzy, J.C., and Dorcas, M.E. 2013. Do golf courses ponds provide suitable habitat for wetland-dependent animals in suburban areas? An assessment of turtle abundances. Journal of Herpetology 47(2):243-250.Kern, M.M., Nassar, A.A., Guzy, J.C., and Dorcas, M.E. 2013. Oviposition Site Selection by Spotted Salamanders (Ambystoma maculatum) in an Isolated Wetland. Journal of Herpetology 47(3):445-449.Underwood, E.B., Bowers, S. Guzy, J.C., Lovich, J.E., Taylor, C.A., Gibbons, J.W., and Dorcas, M.E. 2013. Sexual dimorphism and feeding ecology of diamondback terrapins (Malaclemys terrapin). Herpetologica 69(4):397-404.Guzy, J.C., McCoy, E.D., Deyle, A.C., Halstead, N., Gonzalez, S.M., and Mushinsky, H.R. 2012. Urbanization interferes with the use of amphibians as indicators of ecological integrity in wetlands. Journal of Applied Ecology 49:941-952.Kern, M.M., Guzy, J.C., Price, S.P., Hunt, S.D., Eskew, E.A., and Dorcas, M.E. 2012. Riparian-zone amphibians and reptiles within the Broad River Basin of South Carolina. Journal of the North Carolina Academy of Sciences 128:81-87.Guzy, J.C., Campbell, T.S., and Campbell, K.R. 2006. Effects of hydrological alterations on frog and toad populations at Morris Bridge Wellfield, Hillsborough County, Florida. Florida Scientist 69(4):276-287. - Data
Tracking durations for marine turtles satellite tagged in Gulf of Mexico and Caribbean sites, 2008-2019
This dataset contains tracking durations for several species of sea turtles tagged with satellite tags between 2008 and 2019. It contains information on species, turtle size, capture methods, tag type, how many days each tag transmitted, whether or not the tag was still attached upon recapture, fouling 'status' of the tag, and foraging region. This dataset thus allows estimation of tracking durati
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.