Intraspecific variation of heat tolerance in a model ectotherm: The role of oxygen, cell size and body size

Simple item page
dc.catalogadorpau
dc.contributor.authorLeiva, Félix P.
dc.contributor.authorSantos, Mauro
dc.contributor.authorRezende Landaeta, Enrico
dc.contributor.authorVerberk, Wilco C. E. P.
dc.date.accessioned2023-12-27T14:14:21Z
dc.date.available2023-12-27T14:14:21Z
dc.date.issued2023
dc.description.abstractVirtually all aspects of the biology of ectotherms are size-and temperature-dependent. Aerobic metabolism is often proposed to explain such relationships, with oxygen limitation setting limits to heat tolerance and constraining growth. However, experimental tests of the role of oxygen in heat tolerance have yielded mixed results, suggesting that oxygen limitation may be important only in certain contexts and on certain time scales but not others. Here, using thermal death time curves, which incorporate the intensity and duration of heat stress, we quantify the ability to survive heat stress in multiple inbred lines of Drosophila melanogaster, under normal and low oxygen conditions. The lines were selected to differ markedly in body size and cell size, as these traits have been hypothesised to shape thermal tolerance via their effects on oxygen supply and demand. Low oxygen condition markedly reduced survival time across inbred lines, especially when flies were exposed to prolonged, mild heat stress. Variations in heat tolerance among lines were partly related to cell size and body size differences, especially under chronic exposure to high temperatures, under hypoxia and in flies that exhibit larger cell size, supporting the idea that differences in cell size affect the oxygen supply and demand via differences in surface area to volume ratio. Because differences in heat tolerance were manifested at different timescales, our results underscore the need to close the gap between responses to acute timescales, typically employed in laboratory studies, and chronic timescales, which are ecologically more relevant.
dc.format.extent10 páginas
dc.fuente.origenORCID
dc.identifier.doi10.1111/1365-2435.14485
dc.identifier.issn0269-8463
dc.identifier.urihttps://doi.org/10.1111/1365-2435.14485
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/75573
dc.identifier.wosidWOS:001126446600001
dc.information.autorucFacultad de Ciencias Biológicas; Rezende Landaeta, Enrico; 0000-0002-6245-9605; 104299
dc.language.isoen
dc.nota.accesoContenido completo
dc.revistaFunctional Ecology
dc.rightsacceso abierto
dc.subjectBody mass
dc.subjectCell size
dc.subjectDGRP lines
dc.subjectOxygen limitation
dc.subjectThermal death time curves
dc.subject.ddc570
dc.subject.deweyBiologíaes_ES
dc.subject.ods03 Good health and well-being
dc.subject.odspa03 Salud y bienestar
dc.titleIntraspecific variation of heat tolerance in a model ectotherm: The role of oxygen, cell size and body size
dc.typeartículo
sipa.codpersvinculados104299
sipa.trazabilidadORCID;2023-12-25
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Intraspecific variation of heat tolerance in a model ectotherm The role of oxygen 27-12-2023.pdf
Size:
862.8 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas