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Regional differences in thermoregulation between two European butterfly communities

Toro‐Delgado, E. ; Vila, R. ; Talavera, G. ; Turner, E. C. ; Hayes, M. P. ; Horrocks, N. P. C. ; Bladon, A. J.

The Journal of animal ecology, 2024-02, Vol.93 (2), p.183-195 [Revista revisada por pares]

England: Blackwell Publishing Ltd

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  • Título:
    Regional differences in thermoregulation between two European butterfly communities
  • Autor: Toro‐Delgado, E. ; Vila, R. ; Talavera, G. ; Turner, E. C. ; Hayes, M. P. ; Horrocks, N. P. C. ; Bladon, A. J.
  • Materias: Air temperature ; Animals ; Avoidance ; Body temperature ; Body Temperature Regulation ; Buffers ; butterflies ; Butterflies - physiology ; Climate Change ; Demographics ; Demography ; Ecosystem ; Environmental risk ; Habitat changes ; Heat ; High temperature ; Hot Temperature ; Microclimate ; Nonlinear response ; overheating ; population trends ; Populations ; Solar radiation ; Temperature ; Thermoregulation ; Thermoregulatory behavior ; Thorax ; Trends ; Wind speed
  • Es parte de: The Journal of animal ecology, 2024-02, Vol.93 (2), p.183-195
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
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  • Descripción: Understanding how different organisms cope with changing temperatures is vital for predicting future species' distributions and highlighting those at risk from climate change. As ectotherms, butterflies are sensitive to temperature changes, but the factors affecting butterfly thermoregulation are not fully understood. We investigated which factors influence thermoregulatory ability in a subset of the Mediterranean butterfly community. We measured adult thoracic temperature and environmental temperature (787 butterflies; 23 species) and compared buffering ability (defined as the ability to maintain a consistent body temperature across a range of air temperatures) and buffering mechanisms to previously published results from Great Britain. Finally, we tested whether thermoregulatory ability could explain species' demographic trends in Catalonia. The sampled sites in each region differ climatically, with higher temperatures and solar radiation but lower wind speeds in the Catalan sites. Both butterfly communities show nonlinear responses to temperature, suggesting a change in behaviour from heat‐seeking to heat avoidance at approximately 22°C. However, the communities differ in the use of buffering mechanisms, with British populations depending more on microclimates for thermoregulation compared to Catalan populations. Contrary to the results from British populations, we did not find a relationship between region‐wide demographic trends and butterfly thermoregulation, which may be due to the interplay between thermoregulation and the habitat changes occurring in each region. Thus, although Catalan butterfly populations seem to be able to thermoregulate successfully at present, evidence of heat avoidance suggests this situation may change in the future. This study is the first to compare thermoregulatory abilities and mechanisms between butterfly communities under different climatic conditions but with overlapping species composition. Both communities showed evidence of heat avoidance behaviour, with a stronger effect in the warmer region. Butterflies in the cooler region depended more on microclimates for thermoregulation.
  • Editor: England: Blackwell Publishing Ltd
  • Idioma: Inglés
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