Skip to Main Content
Correlations between El Niño Southern Oscillation and changes in Nearctic-Neotropic migrant condition in Central AmericaAuthor(s): J.D. Wolfe; C.J. Ralph
Source: The Auk 126(4): 809-814
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (222.36 KB)
DescriptionClimatic changes induced by the El Niño–Southern Oscillation (ENSO) commonly influence biological systems; however, climatic variability and multitrophic interactions within tropical latitudes remain poorly understood. We examined relationships between migrant condition and ENSO during spring migration in Costa Rica. Our study is based on correlating an ENSO index with body-condition metrics of six Nearctic–Neotropic migrant bird species during stopover in Costa Rica over a 10-year period. This study is the first to report correlations between El Niño and changes in condition of multiple migrant species. The condition of one insectivore improved, whereas two frugivores experienced reduced condition during El Niño. Our detected correlations suggest that the ENSO cycle may influence changes in migrant mass; such interactions may ultimately affect demographics of certain frugivorous and insectivorous migrant species. Potential future management considerations are discussed in light of global climate change and our findings.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationWolfe, J.D.; Ralph, C.J. 2009. Correlations between El Niño Southern Oscillation and changes in Nearctic-Neotropic migrant condition in Central America. The Auk. 126:809-814.
Keywordscondition index, Costa Rica, El Niño–Southern Oscillation, ENSO, spring migration
- Changes in the apparent survival of a tropical bird in response to the El Niño Southern Oscillation in mature and young forest in Costa Rica
- Do birds select habitat or food resources? Nearctic-neotropic migrants in northeastern Costa Rica
- Diet of some spring migrant landbirds on the Caribbean coast of Costa Rica
XML: View XML