Welcome to the Johnson Lab Homepage at WKU
 
   
 
Publications
 
 
2013 Johnson, J. R., M. E. Ryan, S. J. Micheletti*, and H. B. Shaffer. 2013. Short pond hydroperiod decreases fitness of non-indigenous hybrid salamanders. Animal Conservation 16:556-565. PDF
  Ryan, M. E., J. R. Johnson, B. M. Fitzpatrick, L. J. Lowenstine, A. M. Picco, and H. B. Shaffer. 2013. Lethal effects of pond water quality on threatened California salamanders with lesser effects on hybrid salamanders. Conservation Biology 27:95-102. PDF
2011 Johnson, J. R., R. C. Thomson, S. J. Micheletti*, and H. B. Shaffer. 2011. The origin of tiger salamander (Ambystoma tigrinum) populations in California, Oregon, and Nevada: introductions or relicts? Conservation Genetics 12:355-370. PDF
  Wang, I. J., J. R. Johnson, B. B. Johnson*, and H. B. Shaffer. 2011. Effective population size is strongly correlated with breeding pond size in the endangered California tiger salamander, Ambystoma californiense. Conservation Genetics 12:911-920. PDF
  Tonione, M., J. R. Johnson, and E. J. Routman. 2011. Microsatellite analysis supports mitochondrial phylogeography of the hellbender (Cryptobranchus alleganiensis). Genetica 139: 209-219. PDF
2010 Johnson, J. R., B. B. Johnson*, and H. B. Shaffer. 2010. Genotype and temperature affect locomotor performance in a tiger salamander hybrid swarm. Functional Ecology. 24:1073-1080. PDF
  Johnson, J. R., B. M. Fitzpatrick, and H. B. Shaffer. 2010. Retention of low-fitness genotypes over six decades of admixture between native and introduced tiger salamanders. BMC Evolutionary Biology 10:147. PDF
  Fitzpatrick, B. M., J. R. Johnson, D. K. Kump, J. J. Smith, S. R. Voss, and H. B. Shaffer. 2010. Rapid spread of invasive genes into a threatened native species. PNAS 107:3606-3610. PDF
  Thomson, R. C., I. J. Wang, and J. R. Johnson. 2010. Invited Review: Genome-enabled molecular marker development for ecology, evolution, and conservation. Molecular Ecology 19:2184-2195. PDF
2009 Fitzpatrick, B. M., J. R. Johnson, D. K. Kump, H. B. Shaffer, J. J. Smith, and S. R. Voss. 2009. Rapid fixation of non-native alleles revealed by genome-wide SNP analysis of hybrid tiger salamanders. BMC Evolutionary Biology 9:176. PDF
  Ryan, M. E., J. R. Johnson, and B. M. Fitzpatrick. 2009. Ecological consequences of introduced genes: Invasive tiger salamander genotypes impact native amphibians. PNAS 106:11166-11171. PDF
2008 Johnson, J. R., R. D. Mahan*, and R. D. Semlitsch. 2008. Terrestrial microhabitat use by gray treefrogs (Hyla versicolor) in oak-hickory forests. Herpetologica 64:259-269. PDF
  Hocking, D. J., T. A. G. Rittenhouse, B. B. Rothermel, J. R. Johnson, C. A. Conner, E. B. Harper, and R. D. Semlitsch. 2008. Breeding and recruitment phenology of amphibians in Missouri oak-hickory forests. American Midland Naturalist 160:41-60. PDF
2007 Johnson, J. R., J. H. Knouft, and R. D. Semlitsch. 2007. Sex and seasonal differences in terrestrial distributions and core habitat estimates for populations of the gray treefrog (Hyla versicolor). Biological Conservation 140:250-258. PDF
  Mahan*, R. D. and J. R. Johnson. 2007. Diet of the gray treefrog, Hyla versicolor in relation to foraging site location. Journal of Herpetology 41:16-23. PDF
2006 Johnson, J. R. 2006. Success of intracoelomic radiotransmitter implants in the arboreal anuran, Hyla versicolor. Lab Animal 35:29-33. PDF
2005 Johnson, J. R. 2005. A novel arboreal pipe-trap designed to capture the gray treefrog (Hyla versicolor). Herpetological Review 36:274-277. PDF
  Johnson, J. R. 2005. Gray treefrog (Hyla versicolor) record size. Herpetological Review 36:302. PDF
2004 Daniel, R. E. and J. R. Johnson. 2004. New size records for three species of Missouri amphibians. Annual Newsletter of Missouri Herpetological Association 17:14. PDF
  Johnson, J. R. 2004. Fall breeding of the southern leopard frog (Rana sphenocephala) in central Missouri. Annual Newsletter of Missouri Herpetological Association 17:14. PDF
2003 Johnson, J. R. and R. D. Semlitsch. 2003. Defining core habitat of local populations of the gray treefrog (Hyla versicolor) based on choice of oviposition site. Oecologia 137:205-210. PDF
2002 Phillips, C. A., J. R. Johnson*, M. J. Dreslik, and J. E. Petzing. 2002. Effects of hydroperiod on recruitment of mole salamanders (Genus Ambystoma) at a temporary pond in Vermilion County, Illinois. Transactions of the Illinois State Academy of Science 95:131-139. PDF
2001 Phillips, C. A., M. J., Dreslik, J. R. Johnson*, and J. E. Petzing. 2001. Application of population estimation to pond breeding salamanders. Transactions of the Illinois State Academy of Science 94:111-118 PDF
 
 
* denotes undergraduate collaborator