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Exposure to thermal extremes favors higher solar reflectivity in intertidal gastropods

During low tides, intertidal animals can be exposed to extreme temperatures that can exceed the animals’ thermal limits. Reflectance of solar radiation could be critical to prevent overheating for animals exposed to the sun; however, most studies ignore near-infrared (NIR) wavelengths that comprise...

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Autores principales: Franklin, Amanda M., Rankin, Katrina J., Hugall, Andrew, Stuart-Fox, Devi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9758529/
https://www.ncbi.nlm.nih.gov/pubmed/36536676
http://dx.doi.org/10.1016/j.isci.2022.105674
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author Franklin, Amanda M.
Rankin, Katrina J.
Hugall, Andrew
Stuart-Fox, Devi
author_facet Franklin, Amanda M.
Rankin, Katrina J.
Hugall, Andrew
Stuart-Fox, Devi
author_sort Franklin, Amanda M.
collection PubMed
description During low tides, intertidal animals can be exposed to extreme temperatures that can exceed the animals’ thermal limits. Reflectance of solar radiation could be critical to prevent overheating for animals exposed to the sun; however, most studies ignore near-infrared (NIR) wavelengths that comprise approximately half of solar energy. Here, we conduct a phylogenetically controlled analysis to test whether the reflectivity of intertidal gastropod species is associated with solar exposure. Gastropods from exposed microhabitats had greater shell total reflectivity than those from sheltered microhabitats. Dry shells of gastropods from exposed microhabitats had higher NIR reflectivity even after controlling for UV-visible reflectivity, supporting selection for thermal benefits independent of visual benefits. Using thermal imaging, we also demonstrated that gastropods with high shell reflectivity had lower heating rate in natural conditions than those with low shell reflectivity. Together, these studies show that reflectivity can play a crucial role in thermoregulation in extreme environments.
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spelling pubmed-97585292022-12-18 Exposure to thermal extremes favors higher solar reflectivity in intertidal gastropods Franklin, Amanda M. Rankin, Katrina J. Hugall, Andrew Stuart-Fox, Devi iScience Article During low tides, intertidal animals can be exposed to extreme temperatures that can exceed the animals’ thermal limits. Reflectance of solar radiation could be critical to prevent overheating for animals exposed to the sun; however, most studies ignore near-infrared (NIR) wavelengths that comprise approximately half of solar energy. Here, we conduct a phylogenetically controlled analysis to test whether the reflectivity of intertidal gastropod species is associated with solar exposure. Gastropods from exposed microhabitats had greater shell total reflectivity than those from sheltered microhabitats. Dry shells of gastropods from exposed microhabitats had higher NIR reflectivity even after controlling for UV-visible reflectivity, supporting selection for thermal benefits independent of visual benefits. Using thermal imaging, we also demonstrated that gastropods with high shell reflectivity had lower heating rate in natural conditions than those with low shell reflectivity. Together, these studies show that reflectivity can play a crucial role in thermoregulation in extreme environments. Elsevier 2022-11-25 /pmc/articles/PMC9758529/ /pubmed/36536676 http://dx.doi.org/10.1016/j.isci.2022.105674 Text en © 2022 The Authors https://creativecommons.org/licenses/by/4.0/This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Franklin, Amanda M.
Rankin, Katrina J.
Hugall, Andrew
Stuart-Fox, Devi
Exposure to thermal extremes favors higher solar reflectivity in intertidal gastropods
title Exposure to thermal extremes favors higher solar reflectivity in intertidal gastropods
title_full Exposure to thermal extremes favors higher solar reflectivity in intertidal gastropods
title_fullStr Exposure to thermal extremes favors higher solar reflectivity in intertidal gastropods
title_full_unstemmed Exposure to thermal extremes favors higher solar reflectivity in intertidal gastropods
title_short Exposure to thermal extremes favors higher solar reflectivity in intertidal gastropods
title_sort exposure to thermal extremes favors higher solar reflectivity in intertidal gastropods
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9758529/
https://www.ncbi.nlm.nih.gov/pubmed/36536676
http://dx.doi.org/10.1016/j.isci.2022.105674
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