Tracy Langkilde

Penn State Interim Executive Vice President and Provost; Dean of the Eberly College of Science; Professor of Biology

Tracy Langkilde

Research Summary

The interface of ecology and evolution to understand how an organism's traits are matched to its environment and responds to novel selective pressures imposed by global environmental change, and the consequences of this adaptation.

Huck Affiliations


Publication Tags

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Lizards Glucocorticoids Corticosterone Lizard Phenotype Hormones Fire Ants Pregnancy Wild Animals Reptiles Population Vertebrates Predator Sceloporus Undulatus Predators Fences Costs And Cost Analysis Ecology Mothers Birds Ant Effect Breeding Physiological Stress Gastrointestinal Microbiome

Most Recent Publications

Emily Howerton, Tracy Langkilde, Katriona Shea, 2024, Ecological Applications

Lara D. Ladage, Gail L. McCormick, Travis R. Robbins, Anna S. Longwell, Tracy Langkilde, 2023, Proceedings of the Royal Society B: Biological Sciences

Consumption of fire ants, an invasive predator and prey of native lizards, may enhance immune functions needed to combat envenomation

C. Tylan, H. I. Engler, G. Villar, T. Langkilde, 2023, Biological Invasions on p. 725-740

Braulio A. Assis, Julian D. Avery, Ryan L. Earley, Tracy Langkilde, 2022, Frontiers in Endocrinology

B. A. Assis, J. D. Avery, R. L. Earley, T. Langkilde, 2022, Integrative Organismal Biology

Kirsty J. MacLeod, Kevin D. Kohl, Brian K. Trevelline, Tracy Langkilde, 2022, Molecular Ecology on p. 185-196

Kirsty J. MacLeod, Tracy Langkilde, Cameron P. Venable, David C. Ensminger, Michael J. Sheriff, 2021, Behavioral Ecology on p. 1330-1338

K. J. MacLeod, T. Langkilde, J. J. Heppner, C. A.F. Howey, K. Sprayberry, C. Tylan, M. J. Sheriff, 2021, Hormones and Behavior

Aundrea K. Westfall, Rory S. Telemeco, Mariana B. Grizante, Damien S. Waits, Amanda D. Clark, Dasia Y. Simpson, Randy L. Klabacka, Alexis P. Sullivan, George H. Perry, Michael W. Sears, Christian L. Cox, Robert M. Cox, Matthew E. Gifford, Henry B. John-Alder, Tracy Langkilde, Michael J. Angilletta, Adam D. Leaché, Marc Tollis, Kenro Kusumi, Tonia S. Schwartz, 2021, GigaScience

Most-Cited Papers

Jennifer B. Tennessen, Susan E. Parks, Tracy Langkilde, 2014, Conservation Physiology

The role of behaviour in the establishment of novel traits

Marlene Zuk, Elizabeth Bastiaans, Tracy Langkilde, Elizabeth Swanger, 2014, Animal Behaviour on p. 333-344

How do duration, frequency, and intensity of exogenous CORT elevation affect immune outcomes of stress?

Gail L. McCormick, Katriona Shea, Tracy Langkilde, 2015, General and Comparative Endocrinology on p. 81-87

Brian K. Trevelline, Kirsty J. MacLeod, Sarah A. Knutie, Tracy Langkilde, Kevin D. Kohl, 2018, Biology Letters

David C. Ensminger, Tracy Langkilde, Dustin A.S. Owen, Kirsty J. MacLeod, Michael J. Sheriff, 2018, Journal of Animal Ecology on p. 1685-1697

Latitudinal and seasonal variation in reproductive effort of the eastern fence lizard (Sceloporus undulatus)

Weiguo Du, Travis R. Robbins, Daniel A. Warner, Tracy Langkilde, Richard Shine, 2014, Integrative Zoology on p. 360-371

Catherine Tylan, Kiara Camacho, Susannah French, Sean P. Graham, Mark W. Herr, Jermayne Jones, Gail L. McCormick, Melissa A. O'Brien, Jennifer B. Tennessen, Christopher J. Thawley, Alison Webb, Tracy Langkilde, 2020, General and Comparative Endocrinology

Survival and reproductive costs of repeated acute glucocorticoid elevations in a captive, wild animal

K. J. MacLeod, M. J. Sheriff, D. C. Ensminger, D. A.S. Owen, T. Langkilde, 2018, General and Comparative Endocrinology on p. 1-6

Gail L. McCormick, Travis R. Robbins, Sonia A. Cavigelli, Tracy Langkilde, 2017, Hormones and Behavior on p. 115-121

Are invasive species stressful? The glucocorticoid profile of native lizards exposed to invasive fire ants depends on the context

Sean P. Graham, Nicole A. Freidenfelds, Christopher J. Thawley, Travis R. Robbins, Tracy Langkilde, 2017, Physiological and Biochemical Zoology on p. 328-337

News Articles Featuring Tracy Langkilde

Penn State announces interim executive vice president and provost ahead of national search

Tracy Langkilde has been announced as interim executive vice president and provost of Penn State

Tracy Langkilde appointed interim executive vice president and provost

Tracy Langkilde, the Verne M. Willaman Dean of the Eberly College of Science, has been named interim executive vice president and provost of Penn State, effective April 15. Langkilde succeeds Executive Vice President and Provost Justin Schwartz, who has been named as the sole finalist for chancellor of the University of Colorado Boulder and will depart Penn State this summer.

Committee advances plan to rename Chemistry Building as 'Benkovic Building'

The Chemistry Building at the University Park campus will be renamed in honor of the careerlong scholarly impact of Stephen Benkovic, Atherton Professor of Chemistry

Honors for Booker, Girirajan, Llinás

3 Penn State researchers have received awards and new titles

Manuel Llinás named as the Ernest C. Pollard Professor in Biotechnology

Manuel Llinás, distinguished professor of biochemistry and molecular biology and of chemistry in the Penn State Eberly College of Science, has been named the Ernest C. Pollard Professor in Biotechnology.

Girirajan named T. Ming Chu Professor of Biochemistry and Molecular Biology

Santhosh Girirajan, professor and interim head of the Penn State Department of Biochemistry and Molecular Biology, has been named the T. Ming Chu Professor of Biochemistry and Molecular Biology.

Penn State chemist Stephen Benkovic named Atherton Professor

Stephen Benkovic, Evan Pugh Professor and Holder of the Eberly Family Chair in Chemistry at Penn State, has been honored by Penn State with the title of Atherton Professor.

These Lizards Stress-Eat When Loud Military Aircraft Fly Overhead

Colorado checkered whiptails on a U.S. Army base show increased stress levels and altered behavior after noisy jets and helicopters pass by, a study finds

This lizard species stress-eats to cope with noisy US Army aircraft

Living in a neighborhood with lots of noise can make you jittery, especially if you're a lizard that's just a few inches long. It's no wonder that lizards exposed to noise pollution from low-flying fighter jets have resorted to stress-eating.

This lizard species stress-eats to cope with noisy US Army aircraft

Living in a neighborhood with lots of noise can make you jittery, especially if you’re a lizard that’s just a few inches long. It’s no wonder that lizards exposed to noise pollution from low-flying fighter jets have resorted to stress-eating.

Nobel Prize-winning Penn State alumnus Paul Berg dies

Penn State alumnus Paul Berg, who received the 1980 Nobel Prize in chemistry, died Feb. 15 at his home in Stanford, California, surrounded by loved ones. He was 96.

Crowley receives Huck Early Career Chair appointment

Nikki Crowley, assistant professor of biology and biomedical engineering, has been named the Dorothy Foehr Huck and J. Lloyd Huck Early Career Chair in Neurobiology and Neural Engineering by the Huck Institutes of the Life Sciences.

Meet the Penn State deans: Tracy Langkilde talks cats, nature — and Vegemite vs. peanut butter

Langkilde was named dean in 2020, but she’s called Happy Valley home for more than a decade. She joined Penn State as an assistant professor in 2007, before becoming head of the biology department in 2016.

WATCH: Tracy Langkilde shares perspective on trail running and pursuing passions

In a video series titled “Perspective: Leaders at Penn State,” Tracy Langkilde, Verne M. Willaman Dean of the Eberly College of Science, reflects on her love for trail running as an opportunity to pursue a passion and reach new heights with others.

Penn State community grieves loss of biomathematician Howard Weiss

Howard Weiss, professor of biology and mathematics at Penn State, passed away peacefully in his sleep on Nov. 5 at the age of 64.

Eating fire ants could prepare lizards for future fire ant attack

Eating fire ants might prepare a lizard’s immune system to be stung by the ants, according to a new study by researchers at Penn State. The study comprehensively assessed how the immune system responds to lizards eating and being stung by these ants and might help researchers understand how other native species respond and adapt to the invasive insects.

How Do Animals Know What Their Predators Are?

It’s a quintessential nature documentary scene: An unsuspecting animal — say, a zebra, a lizard or a seal — is spotted by a hungry lion, hawk or shark. Suddenly, the predator attacks, and off they go into a high-speed chase. But how does the prey recognize its foe and understand that it poses a risk?

Snapshot USA: First-ever nationwide mammal survey now published

The results of the first national mammal survey, now publicly available online, provide the framework to answer a variety of questions about wild animal populations and conservation strategies for threatened species. The survey, which involved researchers from across the country including a biologist at Penn State, is made up of data from 1,509 motion-activated camera traps from 110 sites located across all 50 states.

Maternal stress during pregnancy may shorten lifespans of male lizard offspring

Mother fence lizards that experience stress during pregnancy give birth to male offspring with shortened telomeres, or bits of non-coding DNA that cap the ends of chromosomes, according to a Penn State-led study.

Sunnier but riskier

Conservation efforts that open up the canopy of overgrown habitat for threatened timber rattlesnakes — whose venom is used in anticoagulants and other medical treatments — are beneficial to snakes but could come at a cost, according to a new study by researchers at Penn State and the University of Scranton.

Biology professor, department head recognized for study of amphibians, reptiles

Professor of Biology Tracy Langkilde has been named Distinguished Herpetologist for her contributions to the field by the Herpetologists' League, an international organization of people devoted to studying the biology of amphibians and reptiles.

Research shows frogs can adapt to traffic noise

Frogs don’t like living near noisy highways any better than people do, but new research suggests that frogs, like hardened city-dwellers, can learn to adapt to the constant din of rumbling trucks, rolling tires and honking horns.

Penn State Researchers Discover Lizards Probably Handle Sex And Stress Better Than People

A new study by Penn State researchers shows that stress doesn’t affect the sexiest features of male eastern fence lizards, definitively proving that lizards have their shit together way more than humans do.

Research: Features that make lizards appealing to potential mates are resilient to stress

Physical traits and behaviors that make a lizard sexy — features used to attract potential mates and fend off competitors — may be important enough that they do not change in the face of stress. A new study by researchers at Penn State reveals that the blue and black badges on the throats and abdomens of male fence lizards — and signaling behaviors used to show them off — are not affected by low levels of stress-associated hormones, unlike many other traits.

Ecology Alum Jennifer Tennessen Brings Acoustics to Killer Whale Conservation

Dr. Jennifer Tennessen applies the lessons of her interdisciplinary research at the Huck to her professional work with killer whales in the Pacific Northwest.