skip to main content
Idioma:
Primo Advanced Search
Primo Advanced Search Query Term
Primo Advanced Search prefilters
Busca Simples

The time course of acclimation of critical thermal maxima is modulated by the magnitude of temperature change and thermal daily fluctuations

Turriago, Jorge L. ; Tejedo, Miguel ; Hoyos, Julio M. ; Camacho, Agustín ; Bernal, Manuel H.

Journal of thermal biology, 2023-05, Vol.114, p.103545-103545, Article 103545 [Periódico revisado por pares]

England: Elsevier Ltd

Texto completo disponível

Citações Citado por
  • Título:
    The time course of acclimation of critical thermal maxima is modulated by the magnitude of temperature change and thermal daily fluctuations
  • Autor: Turriago, Jorge L. ; Tejedo, Miguel ; Hoyos, Julio M. ; Camacho, Agustín ; Bernal, Manuel H.
  • Assuntos: Acclimation rate ; Acclimation temperature ; Acclimatization ; Amphibians ; Animals ; Anura ; CTmax ; Daily thermal fluctuations ; Heat-Shock Response ; Hot Temperature ; Larva ; Phenotypic plasticity ; Temperature
  • É parte de: Journal of thermal biology, 2023-05, Vol.114, p.103545-103545, Article 103545
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Plasticity in the critical thermal maximum (CTmax) helps ectotherms survive in variable thermal conditions. Yet, little is known about the environmental mechanisms modulating its time course. We used the larvae of three neotropical anurans (Boana platanera, Engystomops pustulosus and Rhinella horribilis) to test whether the magnitude of temperature changes and the existence of fluctuations in the thermal environment affected both the amount of change in CTmax and its acclimation rate (i.e., its time course). For that, we transferred tadpoles from a pre-treatment temperature (23 °C, constant) to two different water temperatures: mean (28 °C) and hot (33 °C), crossed with constant and daily fluctuating thermal regimes, and recorded CTmax values, daily during six days. We modeled changes in CTmax as an asymptotic function of time, temperature, and the daily thermal fluctuation. The fitted function provided the asymptotic CTmax value (CTmax∞) and CTmax acclimation rate (k). Tadpoles achieved their CTmax∞ between one and three days. Transferring tadpoles to the hot treatment generated higher CTmax∞ at earlier times, inducing faster acclimation rates in tadpoles. In contrast, thermal fluctuations equally led to higher CTmax∞ values but tadpoles required longer times to achieve CTmax∞ (i.e., slower acclimation rates). These thermal treatments interacted differently with the studied species. In general, the thermal generalist Rhinella horribilis showed the most plastic acclimation rates whereas the ephemeral-pond breeder Engystomops pustulosus, more exposed to heat peaks during larval development, showed less plastic (i.e., canalized) acclimation rates. Further comparative studies of the time course of CTmax acclimation should help to disentangle the complex interplay between the thermal environment and species ecology, to understand how tadpoles acclimate to heat stress. •Acclimation time depends on both the rate acclimation and magnitude of gain of CTmax.•Acclimation to higher temperatures and thermal fluctuations led to higher CTmax.•Acclimation rates increase at high temperatures but decrease with thermal fluctuation.•The acclimation time of the CTmax was between one and three days.•Acclimation time coincides with autocorrelation of maximum ponds temperatures.
  • Editor: England: Elsevier Ltd
  • Idioma: Inglês
Links
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  7 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.