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Seasonal change in tropical habitat quality and body condition for a declining migratory songbird.
McKinnon, Emily A; Rotenberg, James A; Stutchbury, Bridget J M.
Afiliação
  • McKinnon EA; Department of Biology, York University, 4700 Keele Street, Toronto, ON, M3J 1P3, Canada. emilymckinnon12@gmail.com.
  • Rotenberg JA; Department of Biological Sciences, University of Windsor, 401 Sunset Avenue, Windsor, ON, N9B 3P4, Canada. emilymckinnon12@gmail.com.
  • Stutchbury BJ; Department of Environmental Studies, University of North Carolina Wilmington, 601 South College Road, Wilmington, NC, 28403-5949, USA.
Oecologia ; 179(2): 363-75, 2015 Oct.
Article em En | MEDLINE | ID: mdl-26001604
Many migratory songbirds spend their non-breeding season in tropical humid forests, where climate change is predicted to increase the severity and frequency of droughts and decrease rainfall. For conservation of these songbirds, it is critical to understand how resources during the non-breeding season are affected by seasonal patterns of drying, and thereby predict potential long-term effects of climate change. We studied habitat quality for a declining tropical forest-dwelling songbird, the wood thrush (Hylocichla mustelina), and tested the hypothesis that habitat moisture and arthropod abundance are drivers of body condition during the overwintering period. We examined habitat moisture, abundance of arthropods and fruit, and condition of individual birds (n = 418) in three habitat types--mature forest, mature forest with increased presence of human activity, and riparian scrub--from October to April. We found a strong pattern of habitat drying from October (wet season) to March (prior to spring migration) in all habitats, with concurrent declines in arthropod and fruit abundance. Body condition of birds also declined (estimated ~5 % decline over the wintering period), with no significant difference by habitat. Relatively poor condition (low body condition index, low fat and pectoral muscles scores) was equally apparent in all habitat types in March. Climate change is predicted to increase the severity of dry seasons in Central America, and our results suggest that this could negatively affect the condition of individual wood thrushes.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Estações do Ano / Mudança Climática / Constituição Corporal / Florestas / Aves Canoras Tipo de estudo: Prognostic_studies Limite: Animals País/Região como assunto: America central / Belice / Caribe ingles Idioma: En Revista: Oecologia Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Canadá País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Estações do Ano / Mudança Climática / Constituição Corporal / Florestas / Aves Canoras Tipo de estudo: Prognostic_studies Limite: Animals País/Região como assunto: America central / Belice / Caribe ingles Idioma: En Revista: Oecologia Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Canadá País de publicação: Alemanha