The evolution of critical thermal limits of life on Earth

Bennett, Joanne M., Sunday, Jennifer, Calosi, Piero ORCID: https://orcid.org/0000-0003-3378-2603, Villalobos, Fabricio, Martínez, Brezo, Molina-Venegas, Rafael, Araújo, Miguel B., Algar, Adam C., Clusella-Trullas, Susana, Hawkins, Bradford A., Keith, Sally Anne, Kühn, Ingolf, Rahbek, Carsten, Rodríguez, Laura, Singer, Alexander, Morales-Castilla, Ignacio et Olalla-Tárraga, Miguel Ángel (2021). The evolution of critical thermal limits of life on Earth. Nature Communications, 12 . p. 1198.

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Résumé

Understanding how species’ thermal limits have evolved across the tree of life is central to predicting species’ responses to climate change. Here, using experimentally-derived estimates of thermal tolerance limits for over 2000 terrestrial and aquatic species, we show that most of the variation in thermal tolerance can be attributed to a combination of adaptation to current climatic extremes, and the existence of evolutionary ‘attractors’ that reflect either boundaries or optima in thermal tolerance limits. Our results also reveal deep-time climate legacies in ectotherms, whereby orders that originated in cold paleoclimates have presently lower cold tolerance limits than those with warm thermal ancestry. Conversely, heat tolerance appears unrelated to climate ancestry. Cold tolerance has evolved more quickly than heat tolerance in endotherms and ectotherms. If the past tempo of evolution for upper thermal limits continues, adaptive responses in thermal limits will have limited potential to rescue the large majority of species given the unprecedented rate of contemporary climate change.

Type de document :	Article
Validation par les pairs :	Oui
Information complémentaire :	CC BY 4.0
Version du document déposé :	Version officielle de l'éditeur
Départements et unités départementales :	Département de biologie, chimie et géographie
Déposé par :	DIUQAR UQAR
Date de dépôt :	27 mars 2023 15:17
Dernière modification :	02 oct. 2023 14:58
URI :	https://semaphore.uqar.ca/id/eprint/2139

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