The effects of warming on loggerhead turtle nesting counts

Global trends in marine turtle nesting numbers vary by region, influenced by environmental or anthropogenic factors. Our study investigates the potential role of past temperature fluctuations on these trends, particularly whether warmer beaches are linked to increased nesting due to higher female pr...

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Detalles Bibliográficos
Autores: Sousa-Guedes, Diana, Campos, João C., Bessa, Filipa, Lasala, Jacob A., Marco, Adolfo, Sillero, Neftalí
Tipo de recurso: conjunto de datos
Estado:Versión publicada
Fecha de publicación:2025
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/394032
Acceso en línea:http://hdl.handle.net/10261/394032
Access Level:acceso abierto
Palabra clave:Climate change
Biological sciences
Caretta caretta
Nesting grounds
Trend analysis
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spelling The effects of warming on loggerhead turtle nesting countsSousa-Guedes, DianaCampos, João C.Bessa, FilipaLasala, Jacob A.Marco, AdolfoSillero, NeftalíClimate changeBiological sciencesCaretta carettaNesting groundsTrend analysisGlobal trends in marine turtle nesting numbers vary by region, influenced by environmental or anthropogenic factors. Our study investigates the potential role of past temperature fluctuations on these trends, particularly whether warmer beaches are linked to increased nesting due to higher female production (since sea turtles have temperature-dependent sex determination). We selected the loggerhead turtle (Caretta caretta) due to its wide distribution, strong philopatry, and vulnerability to environmental changes. We compiled nest counts per year on 35 globally significant rookeries, analysing trends at regional and individual beach levels. We compiled air (CHELSA) and land surface (MODIS) temperature datasets spanning the last four decades (1979-2023) for each location. To analyse temporal trends in nest counts and temperatures, we used generalised additive models and Mann-Kendall trend tests. Additionally, we correlated nest counts with lagged air temperature variables. We found significant warming at 33 nesting locations, 23 of which also showed significant increases in nest counts. Our results suggest that rising temperatures may be boosting nest numbers in regions of the Caribbean, Atlantic Ocean, and Mediterranean (sites in Cayman, Mexico, Brazil, Cyprus, and Turkey). Furthermore, while some regions temporarily benefit, continued warming could precipitate long-term population declines. This regional variability helps predict species responses to climate change, with the general global increase in nest counts already indicating short-term warming effects. Nesting count trends might reflect a combination of natural ecological phenomena, conservation efforts, and warming effects. Long-term studies are needed to assess global trends in the sex ratio of hatchlings and the extent to which feminisation is driving nest numbers.Fundação para a Ciência e TecnologiaPeer reviewedDryadFundação para a Ciência e a Tecnologia (Portugal)Sousa-Guedes, Diana [0000-0002-4496-6283]Sillero, Neftalí [0000-0002-3490-3780]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252025info:eu-repo/semantics/datasethttp://purl.org/coar/resource_type/c_ddb1Publisher's versioninfo:eu-repo/semantics/publishedVersionapplication/ziphttp://hdl.handle.net/10261/394032reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésSousa-Guedes, Diana; Campos, João C.; Bessa, Filipa; Lasala, Jacob A.; Marco, Adolfo; Sillero, Neftalí. https://doi.org/10.1111/1365-2656.14242. http://hdl.handle.net/10261/394031 The effects of warming on loggerhead turtle nesting countshttps://doi.org/10.5061/dryad.b8gtht7n5Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3940322026-05-22T06:33:51Z
dc.title.none.fl_str_mv The effects of warming on loggerhead turtle nesting counts
title The effects of warming on loggerhead turtle nesting counts
spellingShingle The effects of warming on loggerhead turtle nesting counts
Sousa-Guedes, Diana
Climate change
Biological sciences
Caretta caretta
Nesting grounds
Trend analysis
title_short The effects of warming on loggerhead turtle nesting counts
title_full The effects of warming on loggerhead turtle nesting counts
title_fullStr The effects of warming on loggerhead turtle nesting counts
title_full_unstemmed The effects of warming on loggerhead turtle nesting counts
title_sort The effects of warming on loggerhead turtle nesting counts
dc.creator.none.fl_str_mv Sousa-Guedes, Diana
Campos, João C.
Bessa, Filipa
Lasala, Jacob A.
Marco, Adolfo
Sillero, Neftalí
author Sousa-Guedes, Diana
author_facet Sousa-Guedes, Diana
Campos, João C.
Bessa, Filipa
Lasala, Jacob A.
Marco, Adolfo
Sillero, Neftalí
author_role author
author2 Campos, João C.
Bessa, Filipa
Lasala, Jacob A.
Marco, Adolfo
Sillero, Neftalí
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Fundação para a Ciência e a Tecnologia (Portugal)
Sousa-Guedes, Diana [0000-0002-4496-6283]
Sillero, Neftalí [0000-0002-3490-3780]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Climate change
Biological sciences
Caretta caretta
Nesting grounds
Trend analysis
topic Climate change
Biological sciences
Caretta caretta
Nesting grounds
Trend analysis
description Global trends in marine turtle nesting numbers vary by region, influenced by environmental or anthropogenic factors. Our study investigates the potential role of past temperature fluctuations on these trends, particularly whether warmer beaches are linked to increased nesting due to higher female production (since sea turtles have temperature-dependent sex determination). We selected the loggerhead turtle (Caretta caretta) due to its wide distribution, strong philopatry, and vulnerability to environmental changes. We compiled nest counts per year on 35 globally significant rookeries, analysing trends at regional and individual beach levels. We compiled air (CHELSA) and land surface (MODIS) temperature datasets spanning the last four decades (1979-2023) for each location. To analyse temporal trends in nest counts and temperatures, we used generalised additive models and Mann-Kendall trend tests. Additionally, we correlated nest counts with lagged air temperature variables. We found significant warming at 33 nesting locations, 23 of which also showed significant increases in nest counts. Our results suggest that rising temperatures may be boosting nest numbers in regions of the Caribbean, Atlantic Ocean, and Mediterranean (sites in Cayman, Mexico, Brazil, Cyprus, and Turkey). Furthermore, while some regions temporarily benefit, continued warming could precipitate long-term population declines. This regional variability helps predict species responses to climate change, with the general global increase in nest counts already indicating short-term warming effects. Nesting count trends might reflect a combination of natural ecological phenomena, conservation efforts, and warming effects. Long-term studies are needed to assess global trends in the sex ratio of hatchlings and the extent to which feminisation is driving nest numbers.
publishDate 2025
dc.date.none.fl_str_mv 2025
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/dataset
http://purl.org/coar/resource_type/c_ddb1
Publisher's version
info:eu-repo/semantics/publishedVersion
format dataset
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/394032
url http://hdl.handle.net/10261/394032
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Sousa-Guedes, Diana; Campos, João C.; Bessa, Filipa; Lasala, Jacob A.; Marco, Adolfo; Sillero, Neftalí. https://doi.org/10.1111/1365-2656.14242. http://hdl.handle.net/10261/394031 The effects of warming on loggerhead turtle nesting counts
https://doi.org/10.5061/dryad.b8gtht7n5
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv Dryad
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dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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