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The Langkilde Lab is housed in the Department of Biology at the Pennsylvania State University. We work at the interface of ecology and evolution to understand how an organism's behavior and physiology is matched to its environment, and responds to novel selective pressures imposed by global environmental change. Our research takes an integrative approach incorporating field and lab observations and manipulations, with a focus on reptiles and amphibians. Dr. Tracy Langkilde Professor and Head Department of Biology The Pennsylvania State University tll30@psu.edu |
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Recent publications
106) MacLeod K.J, McCormick G.L., and Langkilde T. 2019. Glucocorticoids do not influence a secondary sexual trait or its behavioral expression in eastern fence lizards. Scientific Reports 9:5229 105) McCormick G.L., Robbins T.R., Cavigelli S.A. and Langkilde T. 2019. Population history with invasive predators predicts innate immune function response to early life glucocorticoid exposure. Journal of Experimental Biology 222: jeb188359 104) Owen D.A.S., Sheriff M.J., Heppner J., Gerke H., Ensminger DC., MacLeod K.J. and Langkilde, T. 2019. Maternal corticosterone increases thermal sensitivity of heart rate in lizard embryos. Biology Letters 15: 20180718 103) Swierk L. and Langkilde T. 2019. Fitness costs of mating with preferred females in a scramble mating system. Behavioral Ecology arz001 102) Venable C.P., Adams T.S. and Langkilde T. 2019. Aversion learning in response to an invasive venomous prey depends on stimulus strength. Biological Invasions 21: 1973-1980 101) Tennessen B.J., Parks S.E., Swierk L., Reinert L.K., Holden W.M., Rollins-Smith L.A., Walsh K.A. and Langkilde T. 2018. Frogs adapt to physiologically costly anthropogenic noise. Proceedings of the Royal Society B 285: 20182194 100) MacLeod K.J., Freidenfelds N.A., Leighton G.M. and Langkilde T. 2018. Tree selection is linked to locomotor performance and associated noise production in a lizard. Journal of Zoology 307: 195-202 99) Thawley C.J., Goldy-Brown M., McCormick G.L., Graham S.P. and Langkilde T. 2018. Presence of an invasive species reverses latitudinal clines of multiple traits in a native species. Global Change Biology 25: 620-628 98) Venable, C.P. and Langkilde T. 2018. Lizards display an ontogenetic shift in relative consumption of native and invasive prey. Canadian Journal of Zoology 97:419-423 97) Blackburn D.G., Lestz L., Barnes M.S., Powers K.G. and Langkilde T. 2018. Morphological features of the yolk processing pattern in the Eastern Fence Lizard, Sceloporus undulatus (Phrynosomatidae). Journal of Morphology 279: 1629-1639 96) Ensminger D., Langkilde T., Owen D. MacLeod K. and Sheriff M. Maternal stress alters the phenotype of the mother, her eggs, and her offspring in a wild caught lizard. Journal of Animal Ecology 87: 1685-1697 95) MacLeod K.J., Sheriff M.J., Ensminger D.C., Owen D.A.S. and Langkilde T. 2018. Survival and reproductive costs of repeated acute glucocorticoid elevations in a captive, wild animal. General and Comparative Endocrinology 268: 1-6 94) Trevelline B.K., MacLeod K.J., Knutie S.A., Langkilde T. and Kohl K.D. 2018. In ovo microbial communities: a potential mechanism for the initial acquisition of gut microbiota among oviparous birds and lizards. Biology Letters 14: 20180225 93) Assis B.A., Swierk L. and Langkilde T. 2018. Performance, behavior and offspring morphology may offset reproductive costs of male‐typical ornamentation for female lizards. Journal of Zoology early view 92) Owen D.A.S., Sheriff M.J., Engler H.I. and Langkilde T. 2018. Sex‐dependent effects of maternal stress: Stressed moms invest less in sons than daughters. Journal of Experimental Zoology-A 329: 317-322 91) Anton A.J., Langkilde T., Graham S. and Fawcett J.D. 2018. Effects of chronic corticosterone increases on the maternal behaviour of the Prairie Skink, Plestiodon septentrionalis. Herpetological Journal 28: 123-126. 90) Swierk L., Langkilde T. 2018. Does repeated human handling of study animals during the mating season affect their offspring? Journal of Experimental Zoology-A 329: 80-86. 89) Mina O., Gall H.E., Elliott H.A., Watson J.E., Mashtare M.L., Langkilde T., Harper J.P., and Boyer E.W. 2018. Estrogen occurrence and persistence in vernal pools impacted by wastewater irrigation practices. Agriculture, Ecosystems and Environment 257: 103-112. 88) Owen D.A.S., Robbins T.R. and Langkilde T. 2018. Trans-generational but not early-life exposure to stressors influences offspring morphology and survival. Oecologia 186: 347-355 87) Tylan C. and Langkilde T. 2017. Local and systemic immune responses to different types of phytohemagglutinin in the green anole: Lessons for field ecoimmunologists. Journal of Experimental Zoology A 327: 322-332. 86) Carlson, B.E. and Langkilde T. 2017. Body size variation in aquatic consumers causes pervasive community effects, independent of mean body size. Ecology and Evolution 7: 9978-9990. 85) Langkilde T., Thawley C.J. and Robbins T.R. 2017. Behavioral Adaptations to Invasive Species: Benefits, Costs, and Mechanisms of Change. In M. Naguib, J. Podos, L. W. Simmons, L. Barrett, S. Healy, & M. Zuk (Eds.), Advances in the Study of Behavior (pp. 199–235). 84) Kelehear C., Graham S.P. and Langkilde T. 2017. Defensive strategies of Puerto Rican Dwarf Geckos (Sphaerodactylus macrolepis) against Invasive Fire Ants. Herpetologica 73: 48-54 83) McCormick G.L., Robbins T.R., Cavigelli S.A. and Langkilde T. 2017. Ancestry trumps experience: Transgenerational but not early life stress affects the adult physiological stress response. Hormones and Behavior 87: 115-121. 82) Herr M.W., Graham S.P. and Langkilde T. 2017. Stressed snakes strike first: Hormone levels and defensive behavior in free ranging Cottonmouths (Agkistrodon piscivorus). General and Comparative Endocrinology 243: 89-95. 81) Thawley, C.J. and Langkilde T. 2017 Attracting unwanted attention: generalization of behavioural adaptation to an invasive predator carries costs. Animal Behaviour 123: 285-291. 80) Graham S.P., Freidenfelds N.A., Thawley C.J., Robbins T.R. and Langkilde T. 2017. Are invasive species stressful? The glucocorticoid profile of native lizards exposed to invasive fire ants depends on the context. Physiological and Biochemical Zoology 90: 328–337 A complete list of publications can be found here. |
Lab news
April 2019 Check out all the new press coverage of our research March 2019 David Ensminger started a postdoc at Western Kentucky University Cameron Venable and David Ensminger successfully defended their PhD theses! August 2018 What a productive summer for the lab. 8 papers accepted since the end of spring semester! July 2018 Dustin Owen takes second place SSAR student prize at #JMIH18 for his fantastic talk on effects of maternal stress on heart rate. Langkilde lab heads to JMIH 2018! September 2017 Lab undergrad researchers Kristen Sprayberry and Jennifer Heppner received the best talk and best undergraduate poster awards at the Three Rivers Evolution Event (TREE) November 2016 Lab alum, Jenny Tennessen, is now a Postdoctoral Researcher with NOAA October 2016 Blog post by Amy Strauss about our work on invasive frogs competing with natives for acoustic space The Langkilde Lab is getting a new member! Tom Adams will be joining the lab as a Research Assistant in November. August 2016 The ENTIRE Langkilde Lab will be presenting at the SICB meetings in Jan. Undergrad alum, Mark Goldy Brown, featured in PSU news for his work as a Peace Corps volunteer in Peru. January 2016 It's been an exciting start to the year! Gail McCormick won the Alumni Association Dissertation Award - among the most prestigious available to Penn State graduate students and recognizes outstanding achievement in scholarship and professional accomplishment. Chris Thawley won the Intercollege Graduate Student Outreach Award, a university-level award to recognize outstanding achievements that relate to bringing scholarship to the community in order to benefit society. Kirsty MacLeod has accepted a postdoc in the Langkilde and Sheriff labs to study maternal stress. Tracy Langkilde has accepted the position of Head of Department of Biology at Penn State. December 2015 Chris Thawley will be starting a postdoc in the Kolbe Lab in May. He will be examining effects of urban lighting on anoles. Dr. Gail McCormick has successfully defended her PhD thesis! PSU Science Journal expose of our research Exploring the Nature of Stress is featured in the PSU Science Journal; a lizard adorns the cover; and there's a great Person-to-Person interview with Gail McCormick. October 2015 Our newest lab member - Cameron Venable has joined the lab to pursue a PhD. We just hit 75 publications! August 2015 A very entertaining feature of our research by PSU News - complete with disco references. Check out our Media page for more stories. June 2015 Chris Howey, Chris Thawley and Gail McCormick are going to the Ecological Society of America's meeting in Baltimore in August - celebrating the society's centennial. Mark Herr received a Grant-In-Herpetology from SSAR for his undergrad research on rattlesnake gestation sites. Mark Herr, Chris Howey, Chris Thawley, and Tracy Langkilde will be presenting at the Society for the Study of Amphibians and Reptiles meetings in Kansas in August. Can't wait! May 2015 Dr. Jenny Tennessen graduated! April 2015 Lindsey Swierk has accepted a Donnelley Postdoc Fellowship at Yale. Congrats Lindsey! Caty Tylan is joining the lab to pursue her PhD. It's going to be an exciting year. Chris Howey got married. March 2015 Dustin Owen and Braulio Assis are joining the lab to pursue their PhD. Chris Thawley was selected as a Hamilton Award finalist to attend the Evolution Meetings in Brazil. NSF has just recommended funding for Michael Sheriff and Tracy Langkilde's research on adaptive consequences of maternal stress! February 2015 Jenny Tennessen successfully defended her PhD dissertation "The Ecological And Evolutionary Consequences of Noise-Induced Acoustic Habitat Loss". Congratulations Dr. Tennessen! Gail and Chris both won the "Science is my Valentine" competition for their herpy pics and witty quotes. We are currently interviewing graduate students for fall 2015. We hope to be introducing our newest lab members soon. Watch this space! August 2014 Chris Thawley and Mark Herr took out first place and honorable mention for their talks at the JMIH meetings. December, 2014 Gail McCormick and Chris Thawley successfully passed their comprehensive exams! Spring, 2014 Two lab post-docs have moved on to faculty positions: Sean Graham at Sul Ross State University and Travis Robbins at Northern New Mexico College! January, 2014 Brad Carlson accepted a position as an Assistant Professor of Vertebrate Biology at Wabash College. He will be starting in July. Congrats, Brad! |
The Lizard Log lab blog
See the Langkilde Lab in Action. Follow our lab blog to keep track of research and other happenings in the lab. Recent posts: Veterinary School: Is it worth it? By Caty Tylan Cam joins the lab! By Cam Venable Starting the year with a bang! By Gail McCormick Portland: Talks and Trolls By Gail McCormick Gearing up for SICB! By Gail McCormick Classing Up Scientific Outreach By Chris Thawley Rattlesnake Research Round-up By Michaelia Mead and Tommy Cerri Here Be Dragons By Mark Herr Science Communication and Art! By Gail McCormick Winter is Coming; Herp While You Can By Chris Thawley What Makes Stress Stressful? By Gail McCormick Bears Are Jerks (and Other Things I Learned Along the Way) By Chris Howey New Kid on the Block By Dustin Owen Wrapping Up a Great Field Season By Chris Howey From Brazil to Happy Valley By Braulio Assis Return to Research Land! By Caty Harlan Closing the Never-ending Loop by Jill Newman #ESA100 By Gail McCormick We’re Not In Kansas Anymore… By Chris Thawley |
