Johnston, G. R. and J. C. Mitchell. Geographic variation in population structure of the Suwannee Cooter (Pseudemys concinna suwanniensis) in a blackwater river in northern Florida. Joint Meeting of the American Society of Ichthyologists and Herpetologists (JMIH), Albuquerque, New Mexico, July 2013.

Johnston, G. R., J. C. Mitchell, T. Thomas, E. Suarez, and A. Lau. Population structure of the Alligator Snapping Turtle (Macrochelys temminckii) at the southeastern edge of its geographic range. World Congress of Herpetology, Vancouver, British Columbia, August 2012.

Johnston, G. R., E. Suarez, A. Lau, M. H. Kail, Y. K. Kornilev, and J. C. Mitchell. Population structure of the Suwannee Cooter (Pseudemys concinna suwanniensis) in the Lower Santa Fe River. Turtle Survival Alliance, 8th Annual Symposium on Conservation and Biology of Tortoises and Freshwater Turtles, Orlando Florida, August 2010.

Suarez, E., M. H. Kail, G.R. Johnston, and S. Johnson. Seasonal patterns of thermoregulatory behavior of adult Florida Snapping Turtles (Chelydra serpentina osceola) in a northern Florida spring-fed blackwater stream. Turtle Survival Alliance, 8th Annual Symposium on Conservation and Biology of Tortoises and Freshwater Turtles, Orlando Florida, August 2010.

Johnston, G. R., A. Lau, E. Suarez, M. H. Kail, and J. C. Mitchell. Ecology of freshwater turtles in a northern Florida river: spatial variation in assemblage structure. Florida Herpetology Conference, Gainesville, Florida, March 2010.

Johnston, G. R., T. M. Thomas, A. Lau, E. Suarez, and M. H. Kail. Ecology of the Alligator Snapping Turtle (Macrochelys temminckii) in a northern Florida river. Florida Herpetology Conference, Gainesville, Florida, March 2010.

Johnston, G. R., A. Lau, E. Suarez, M. H. Kail, and J. C. Mitchell. Ecology of freshwater turtles in a northern Florida river: spatial variation in assemblage structure. Annual Meeting of the Southeast Partners in Amphibian and Reptile Conservation (SEPARC), Ocala, Florida, February 2010.

Johnston, G. R., T. M. Thomas, A. Lau, E. Suarez, and M. H. Kail. Ecology of the Alligator Snapping Turtle (Macrochelys temminckii) in a northern Florida river. Annual Meeting of the Southeast Partners in Amphibian and Reptile Conservation (SEPARC), Ocala, Florida, February 2010.

Suarez, E., M. H. Kail, G. R. Johnston, and S. Johnson. Seasonal patterns of thermoregulatory behavior of adult Florida Snapping Turtles (Chelydra serpentina osceola) in a northern Florida spring-fed blackwater stream. Annual Meeting of the Southeast Partners in Amphibian and Reptile Conservation (SEPARC), Ocala, Florida, February 2010.

Johnston, G. R. and J. C. Mitchell. Ecology of a riverine population of Yellow-bellied Sliders (Trachemys scripta scripta) at the southern edge of their range. Annual Meeting of the Southeast Partners in Amphibian and Reptile Conservation (SEPARC), Montreat, North Carolina, February 2009. 

Lau, A. and G. R. Johnston. Composition of a turtle assemblage in a north Florida blackwater stream. Annual Meeting of the Southeast Partners in Amphibian and Reptile Conservation (SEPARC), Montreat, North Carolina, February 2009.

Lau, A. and G. R. Johnston. Composition of a turtle assemblage in a north Florida spring-fed blackwater stream. Turtle Survival Alliance, 5th Annual Symposium on Conservation and Biology of Tortoises and Freshwater Turtles, Atlanta, Georgia, July 2007. “Best Student Poster Award” Johnston, G. R., T. M. Thomas, and B. Atkinson. Ecology of the Alligator Snapping Turtle (Macrochelys temminckii) in a north-central Florida state park. Turtle Survival Alliance, 4th Annual Symposium on Conservation and Biology of Tortoises and Freshwater Turtles, St. Louis, Missouri, July 2006.