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Chronic exposure to environmental temperature attenuates the thermal sensitivity of salmonids

Abstract: Metabolism, the biological processing of energy and materials, scales predictably with temperature and body size. Temperature effects on metabolism are normally studied via acute exposures, which overlooks the capacity for organisms to moderate their metabolism following chronic exposure to warming. Here, we conduct respirometry assays in situ and after transplanting salmonid fish among different streams to disentangle the effects of chronic and acute thermal exposure. We find a clear temperature dependence of metabolism for the transplants, but not the in-situ assays, indicating that chronic exposure to warming can attenuate salmonid thermal sensitivity. A bioenergetic model accurately captures the presence of fish in warmer streams when accounting for chronic exposure, whereas it incorrectly predicts their local extinction with warming when incorporating the acute temperature dependence of metabolism. This highlights the need to incorporate the potential for thermal acclimation or adaptation when forecasting the consequences of global warming on ecosystems.

 Fuente: Nature Communications, 2023, 14, 8309

 Editorial: Nature Publishing Group

 Fecha de publicación: 14/12/2023

 Nº de páginas: 10

 Tipo de publicación: Artículo de Revista

 DOI: 10.1038/s41467-023-43478-7

 ISSN: 2041-1723

 Proyecto español: PID2019-107085RB-I00

 Url de la publicación: https://www.nature.com/articles/s41467-023-43478-7#Ack1

Autoría

PENELOPE S. A.BLYTH,

HAWKSLEY, JACK

KINSELLA, HUGH

LAURIDSEN, RASMUS

MORRIS, OLIVIA F.

FRANCISCO JESUS PEÑAS SILVA

THOMAS, GARETH E.

WOODWARD, GUY

ZHAO, LEI

O`GORMAN, EOIN J.