Thermal acclimation of tropical coral reef fishes to global heat waves.

Autor:	Johansen JL; Hawaii Institute of Marine Biology, University of Hawaii, Kaneohe, United States.; ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Australia., Nadler LE; ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Australia.; Halmos College of Arts and Sciences, Nova Southeastern University, Dania Beach, United States.; College of Science and Engineering, James Cook University, Townsville, Australia., Habary A; ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Australia., Bowden AJ; CSIRO, Hobart, Australia.; Institute of Marine and Antarctic Studies, University of Tasmania, Hobart, Australia., Rummer J; ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Australia.; College of Science and Engineering, James Cook University, Townsville, Australia.
Jazyk:	angličtina
Zdroj:	ELife [Elife] 2021 Jan 26; Vol. 10. Date of Electronic Publication: 2021 Jan 26.
DOI:	10.7554/eLife.59162
Abstrakt:	As climate-driven heat waves become more frequent and intense, there is increasing urgency to understand how thermally sensitive species are responding. Acute heating events lasting days to months may elicit acclimation responses to improve performance and survival. However, the coordination of acclimation responses remains largely unknown for most stenothermal species. We documented the chronology of 18 metabolic and cardiorespiratory changes that occur in the gills, blood, spleen, and muscles when tropical coral reef fishes are thermally stressed (+3.0°C above ambient). Using representative coral reef fishes ( Caesio cuning and Cheilodipterus quinquelineatus ) separated by >100 million years of evolution and with stark differences in major life-history characteristics (i.e. lifespan, habitat use, mobility, etc.), we show that exposure duration illicited coordinated responses in 13 tissue and organ systems over 5 weeks. The onset and duration of biomarker responses differed between species, with C. cuning - an active, mobile species - initiating acclimation responses to unavoidable thermal stress within the first week of heat exposure; conversely, C. quinquelineatus - a sessile, territorial species - exhibited comparatively reduced acclimation responses that were delayed through time. Seven biomarkers, including red muscle citrate synthase and lactate dehydrogenase activities, blood glucose and hemoglobin concentrations, spleen somatic index, and gill lamellar perimeter and width, proved critical in evaluating acclimation progression and completion, as these provided consistent evaluation of thermal responses across species. Competing Interests: JJ, LN, AH, AB, JR No competing interests declared (© 2021, Johansen et al.)
Databáze:	MEDLINE
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