Invasion Ecology and Management


In conjunction with advancing management objectives, I investigate physiological and environmental influences of phenotypic expression of invasive snakes and lizards at different timescales. The goal of the research is to discern physiological influences on invasive species' successes and failures to inform management and prevention. This research has included collaborations with federal, state, city, and non-govermental conservation organizations. 

I have worked on many different study systems, including wild invasive Burmese Pythons in response to short-term captivity; a population of invasive brown tree snakes in Guam as prey resources fluctuate over 25 years; multiple invasive lizard populations in Florida with differing establishment dates. I found that invasive Burmese pythons are physiologically resilient to capture and captivity stress, which may translate to their invasion success in novel environments. Fluctuating resources over time influenced expression of stress endocrinology in brown tree snakes, and expression of immune and stress reactivity were different among populations of Northern Curly-tailed Lizards and Peters's Rock Agamas. I am currently investigating different techniques for removal of several invasive lizard species by integrating knowledge of behavior and chemosensory systems to develop chemical and robotic lures. 

The goals of my continued invasion physiology research are to understand the influence of physiological plasticity on the success of invasive vertebrates throughout the invasion pathway in species with different invasion histories. My research also aims to advance ecological, physiological, and behavioral knowledge of species of interest to improve management tools such as lures, traps, and survey techniques.

Publications


Invaders from Islands: Thermal Matching, Potential, or Plasticity? Biological Journal of the Linnean Society


Claunch N, Goodman C, Guralnick R, Reed R, Romagosa CM, Taylor EN

Biological Journal of the Linnean Society


Welcome to Paradise: Snake Invasions on Islands


N. Claunch, K. Clancy, M. Harman, K. Hengstebeck, D. Juárez-Sánchez, D. Haro, A. Hartmann, M. Vilchez, R. McKee, A. Sutton, C. Romagosa

H. Lillywhite, M. Martins, Island Snakes Volume II, Oxford University Press


Evaluation of three removal methods for an invasive lizard, Peters' Rock Agama (Agama picticauda)


N. Claunch, M. Legare, A. Nicely, P. Hall, J. Edwards, F. Rivera-Milán, B. Kluever, C. Romagosa

Frontiers in Amphibian and Reptile Science, vol. 3, 2026


State of knowledge for invasive green iguanas in Florida reveals negative impacts and pervasive research needs


N. Claunch, P. Jones, E. Khazan, B. Kluever

Frontiers in Amphibian and Reptile Science, vol. 3, 2025


Commonly collected thermal performance data best inform species distributions in a data-limited invader.


N. Claunch, C. Goodman, B. Kluever, R. Guralnick, C. Romagosa

Scientific Reports, vol. 13, 2023


Physiological effects of capture and short-term captivity in an invasive snake species, the Burmese python (Python bivittatus) in Florida


Natalie M. Claunch, Ian A. Bartoszek, Steve Tillis, Nicole I. Stacy, Robert J. Ossiboff, Samantha Oakey, Laura A. Schoenle, James F.X. Wellehan, Christina M. Romagosa

Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, vol. 267, 2022, p. 111162


Understanding metrics of stress in the context of invasion history: the case of the brown treesnake (Boiga irregularis)


Claunch N, Moore IT, Waye H, Schoenle L, Oakey S, Reed RN, Romagosa CM

Conservation Physiology, vol. 9, 2021, pp. coab008


Extreme male color polymorphism supports the introduction of multiple native-range Panther Chameleon (Furcifer pardalis) lineages to Florida, USA


Fieldsend T, Claunch N, Fridie B, Goodman C, Harman M, Krysko K, Raxworthy C, Romagosa C, Collins T

Reptiles and Amphibians , vol. 28, 2021, pp. 257-261