Translator Disclaimer
1 October 2009 Correlations between El Niño—Southern Oscillation and Changes in Nearctic—Neotropic Migrant Condition in Central America
Author Affiliations +
Abstract

Climatic 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.

© 2009 by The American Ornithologists' Union. All rights reserved. Please direct all requests for permission to photocopy or reproduce article content through the University of California Press's Rights and Permissions website, http://www.ucpressjournals.com/reprintlnfo.asp.
Jared D. Wolfe and C. John Ralph "Correlations between El Niño—Southern Oscillation and Changes in Nearctic—Neotropic Migrant Condition in Central America," The Auk 126(4), (1 October 2009). https://doi.org/10.1525/auk.2009.08018
Received: 27 January 2008; Accepted: 28 April 2009; Published: 1 October 2009
JOURNAL ARTICLE
6 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top