Physiology at near‐critical temperatures, but not critical limits, varies between two lizard species that partition the thermal environment Bronikowski, Anne Gangloff, Eric Codero, Gerardo Janzen, Fredric Bronikowski, Anne Janzen, Fredric
dc.contributor.department Ecology, Evolution and Organismal Biology 2018-07-02T21:24:55.000 2020-06-30T02:17:44Z 2020-06-30T02:17:44Z Sun Jan 01 00:00:00 UTC 2017 2018-11-01 2017-11-01
dc.description.abstract <p>1. The mechanisms that mediate the interaction between the thermal environment and species’ ranges are generally uncertain. Thermal environments may directly restrict species when environments exceed tolerance limits (i.e. the fundamental niche). However, thermal environments might also differentially affect relative performance among species prior to fundamental tolerances being met (i.e. the realized niche).</p> <p>2. We examined stress physiology (plasma glucose and corticosterone), mitochondrial performance, and the muscle metabolome of congeneric lizards that naturally partition the thermal niche, Elgaria multicarinata (southern alligator lizards; SAL) and E. coerulea (northern alligator lizards; NAL), in response to a thermal challenge to quantify variation in physiological performance and tolerance.</p> <p>3. Both NAL and SAL displayed physiological stress in response to high temperature, but neither showed signs of irreversible damage. NAL displayed a higher baseline mitochondrial respiration rate than SAL. Moreover, NAL substantially adjusted their physiology in response to thermal challenge whereas SAL did not. For example, the metabolite profile of NAL shifted with changes in key energetic molecules, whereas these were unaffected in SAL.</p> <p>4. Our results indicate that near-critical high temperatures should incur greater energetic cost in NAL than SAL via an elevated metabolic rate and changes to the metabolome. Thus, SAL displace NAL in warm environments that are within NAL’s fundamental thermal niche, but relatively costly.</p> <p>5. Our results suggest that sub-critical thermal events can contribute to biogeographic patterns via physiological differences that alter the relative costs of living in warm or cool environments.</p>
dc.description.comments <p>This is the peer reviewed version of the following article: Telemeco, Rory S., Eric J. Gangloff, Gerardo A. Cordero, Rebecca L. Polich, Anne M. Bronikowski, and Fredric J. Janzen. "Physiology at near‐critical temperatures, but not critical limits, varies between two lizard species that partition the thermal environment." Journal of Animal Ecology 86, no. 6 (2017): 1510-1522, which has been published in final form at doi: <a href="">10.1111/1365-2656.12738</a>. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.</p>
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dc.identifier archive/
dc.identifier.articleid 1283
dc.identifier.contextkey 12429051
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath eeob_ag_pubs/276
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 23:07:38 UTC 2022
dc.source.uri 10.1111/1365-2656.12738
dc.subject.disciplines Animal Sciences
dc.subject.disciplines Behavior and Ethology
dc.subject.disciplines Ecology and Evolutionary Biology
dc.subject.disciplines Terrestrial and Aquatic Ecology
dc.subject.keywords Corticosterone
dc.subject.keywords OCLTT
dc.subject.keywords Pejus temperatures
dc.subject.keywords Reactive oxygen species
dc.subject.keywords State III respiration
dc.title Physiology at near‐critical temperatures, but not critical limits, varies between two lizard species that partition the thermal environment
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication 6fa4d3a0-d4c9-4940-945f-9e5923aed691
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