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Australian songbird body size tracks climate variation: 82 species over 50 years.
Gardner, Janet L; Amano, Tatsuya; Peters, Anne; Sutherland, William J; Mackey, Brendan; Joseph, Leo; Stein, John; Ikin, Karen; Little, Roellen; Smith, Jesse; Symonds, Matthew R E.
Afiliación
  • Gardner JL; Division of Ecology and Evolution, Research School of Biology, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
  • Amano T; School of Biological Sciences, Monash University, Clayton, Victoria 3168, Australia.
  • Peters A; School of Biological Sciences, University of Queensland, Brisbane, 4072 Queensland, Australia.
  • Sutherland WJ; School of Biological Sciences, Monash University, Clayton, Victoria 3168, Australia.
  • Mackey B; Department of Zoology, University of Cambridge, The David Attenborough Building, Pembroke Street, Cambridge CB2 3QZ, UK.
  • Joseph L; Griffith Climate Change Response Program, Griffith University, Gold Coast Campus, Queensland 4222, Australia.
  • Stein J; Australian National Wildlife Collection, CSIRO National Research Collections Australia, GPO Box 1700, Canberra, Australian Capital Territory 2601, Australia.
  • Ikin K; The Fenner School of Environment and Society, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
  • Little R; The Fenner School of Environment and Society, The Australian National University, Canberra, Australian Capital Territory 0200, Australia.
  • Smith J; School of Biological Sciences, Monash University, Clayton, Victoria 3168, Australia.
  • Symonds MRE; School of Biological Sciences, Monash University, Clayton, Victoria 3168, Australia.
Proc Biol Sci ; 286(1916): 20192258, 2019 12 04.
Article en En | MEDLINE | ID: mdl-31771472
The observed variation in the body size responses of endotherms to climate change may be explained by two hypotheses: the size increases with climate variability (the starvation resistance hypothesis) and the size shrinks as mean temperatures rise (the heat exchange hypothesis). Across 82 Australian passerine species over 50 years, shrinking was associated with annual mean temperature rise exceeding 0.012°C driven by rising winter temperatures for arid and temperate zone species. We propose the warming winters hypothesis to explain this response. However, where average summer temperatures exceeded 34°C, species experiencing annual rise over 0.0116°C tended towards increasing size. Results suggest a broad-scale physiological response to changing climate, with size trends probably reflecting the relative strength of selection pressures across a climatic regime. Critically, a given amount of temperature change will have varying effects on phenotype depending on the season in which it occurs, masking the generality of size patterns associated with temperature change. Rather than phenotypic plasticity, and assuming body size is heritable, results suggest selective loss or gain of particular phenotypes could generate evolutionary change but may be difficult to detect with current warming rates.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Pájaros Cantores / Tamaño Corporal Límite: Animals País/Región como asunto: Oceania Idioma: En Revista: Proc Biol Sci Asunto de la revista: BIOLOGIA Año: 2019 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Pájaros Cantores / Tamaño Corporal Límite: Animals País/Región como asunto: Oceania Idioma: En Revista: Proc Biol Sci Asunto de la revista: BIOLOGIA Año: 2019 Tipo del documento: Article País de afiliación: Australia Pais de publicación: Reino Unido