Journal article 33 views
Empirical evidence for the extent of spatial and temporal thermal variation on sea turtle nesting beaches
Journal of Thermal Biology, Start page: 103965
Swansea University Author: Nicole Esteban
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DOI (Published version): 10.1016/j.jtherbio.2024.103965
Abstract
Recording sand temperatures has become routine at many sea turtle nesting sites across the world given the impacts of incubation temperatures on hatchling sex ratios. However, the extent of thermal variability found at a nesting site has previously received little attention. Here we examine empirica...
Published in: | Journal of Thermal Biology |
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ISSN: | 0306-4565 |
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Elsevier BV
2024
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URI: | https://cronfa.swan.ac.uk/Record/cronfa67659 |
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v2 67659 2024-09-12 Empirical evidence for the extent of spatial and temporal thermal variation on sea turtle nesting beaches fb2e760b83b4580e7445092982f1f319 0000-0003-4693-7221 Nicole Esteban Nicole Esteban true false 2024-09-12 BGPS Recording sand temperatures has become routine at many sea turtle nesting sites across the world given the impacts of incubation temperatures on hatchling sex ratios. However, the extent of thermal variability found at a nesting site has previously received little attention. Here we examine empirical sand temperature records across five atolls extending 250 km in the Chagos archipelago, Indian Ocean, between October 2012 and July 2023 and quantify the extent of spatial and temporal thermal variability. Our results suggest that sand temperatures at our study site vary seasonally and inter-annually, between beaches in the archipelago, and within beaches in different nesting habitats. The biggest drivers of thermal variability were seasonal and inter-annual differences, which modulated sand temperatures by up to 3.00°C and 1.03°C, respectively. Intra-beach and inter-beach variability further modulated temperatures by up to 0.56°C and 0.85°C, respectively. In addition, mean monthly sand temperatures were relatively low, suggesting that hatchling sex ratios are fairly balanced. The wide range of sand temperatures recorded at this nesting site suggests that it is likely both male-biased and female-biased clutches are produced during the nesting season. Quantifying thermal variability from a long-term sand temperature time series offers valuable insight into a population with temperature-dependent sex determination and, when possible, should be considered when modelling temperature impacts on hatchling sex ratios. Journal Article Journal of Thermal Biology 0 103965 Elsevier BV 0306-4565 12 9 2024 2024-09-12 10.1016/j.jtherbio.2024.103965 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University SU Library paid the OA fee (TA Institutional Deal) Bertarelli Foundation 2017-4, 820633 2024-09-17T15:04:02.8267398 2024-09-12T11:42:28.7018404 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Holly J. Stokes 1 Jacques-Olivier Laloë 0000-0002-1437-1959 2 Nicole Esteban 0000-0003-4693-7221 3 Graeme C. Hays 0000-0002-3314-8189 4 |
title |
Empirical evidence for the extent of spatial and temporal thermal variation on sea turtle nesting beaches |
spellingShingle |
Empirical evidence for the extent of spatial and temporal thermal variation on sea turtle nesting beaches Nicole Esteban |
title_short |
Empirical evidence for the extent of spatial and temporal thermal variation on sea turtle nesting beaches |
title_full |
Empirical evidence for the extent of spatial and temporal thermal variation on sea turtle nesting beaches |
title_fullStr |
Empirical evidence for the extent of spatial and temporal thermal variation on sea turtle nesting beaches |
title_full_unstemmed |
Empirical evidence for the extent of spatial and temporal thermal variation on sea turtle nesting beaches |
title_sort |
Empirical evidence for the extent of spatial and temporal thermal variation on sea turtle nesting beaches |
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fb2e760b83b4580e7445092982f1f319 |
author_id_fullname_str_mv |
fb2e760b83b4580e7445092982f1f319_***_Nicole Esteban |
author |
Nicole Esteban |
author2 |
Holly J. Stokes Jacques-Olivier Laloë Nicole Esteban Graeme C. Hays |
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Journal of Thermal Biology |
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103965 |
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2024 |
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10.1016/j.jtherbio.2024.103965 |
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Elsevier BV |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences |
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description |
Recording sand temperatures has become routine at many sea turtle nesting sites across the world given the impacts of incubation temperatures on hatchling sex ratios. However, the extent of thermal variability found at a nesting site has previously received little attention. Here we examine empirical sand temperature records across five atolls extending 250 km in the Chagos archipelago, Indian Ocean, between October 2012 and July 2023 and quantify the extent of spatial and temporal thermal variability. Our results suggest that sand temperatures at our study site vary seasonally and inter-annually, between beaches in the archipelago, and within beaches in different nesting habitats. The biggest drivers of thermal variability were seasonal and inter-annual differences, which modulated sand temperatures by up to 3.00°C and 1.03°C, respectively. Intra-beach and inter-beach variability further modulated temperatures by up to 0.56°C and 0.85°C, respectively. In addition, mean monthly sand temperatures were relatively low, suggesting that hatchling sex ratios are fairly balanced. The wide range of sand temperatures recorded at this nesting site suggests that it is likely both male-biased and female-biased clutches are produced during the nesting season. Quantifying thermal variability from a long-term sand temperature time series offers valuable insight into a population with temperature-dependent sex determination and, when possible, should be considered when modelling temperature impacts on hatchling sex ratios. |
published_date |
2024-09-12T15:04:01Z |
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1810452280862834688 |
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11.028798 |