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Proceedings of the Royal Society B: Biological Sciences logoLink to Proceedings of the Royal Society B: Biological Sciences
. 2004 Jan 7;271(1534):59–64. doi: 10.1098/rspb.2003.2569

Tropical winter habitat limits reproductive success on the temperate breeding grounds in a migratory bird.

D Ryan Norris 1, Peter P Marra 1, T Kurt Kyser 1, Thomas W Sherry 1, Laurene M Ratcliffe 1
PMCID: PMC1691559  PMID: 15002772

Abstract

Identifying the factors that control population dynamics in migratory animals has been constrained by our inability to track individuals throughout the annual cycle. Using stable carbon isotopes, we show that the reproductive success of a long-distance migratory bird is influenced by the quality of habitat located thousands of kilometres away on tropical wintering grounds. For male American redstarts (Setophaga ruticilla), winter habitat quality influenced arrival date on the breeding grounds, which in turn affected key variables associated with reproduction, including the number of young fledged. Based on a winter-habitat model, females occupying high-quality winter habitat were predicted to produce more than two additional young and to fledge offspring up to a month earlier compared with females wintering in poor-quality habitat. Differences of this magnitude are highly important considering redstarts are single brooded, lay clutches of only three to five eggs and spend only two-and-a-half months on the breeding grounds. Results from this study indicate the importance of understanding how periods of the annual cycle interact for migratory animals. Continued loss of tropical wintering habitat could have negative effects on migratory populations in the following breeding season, minimizing density-dependent effects on the breeding grounds and leading to further population declines. If conservation efforts are to be successful, strategies must incorporate measures to protect all the habitats used during the entire annual cycle of migratory animals.

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Selected References

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  1. Gill J. A., Norris K., Potts P. M., Gunnarsson T. G., Atkinson P. W., Sutherland W. J. The buffer effect and large-scale population regulation in migratory birds. Nature. 2001 Jul 26;412(6845):436–438. doi: 10.1038/35086568. [DOI] [PubMed] [Google Scholar]
  2. Marra PP, Hobson KA, Holmes RT. Linking winter and summer events in a migratory bird by using stable-carbon isotopes . Science. 1998 Dec 4;282(5395):1884–1886. doi: 10.1126/science.282.5395.1884. [DOI] [PubMed] [Google Scholar]
  3. Robinson S. K., Thompson F. R., 3rd, Donovan T. M., Whitehead D. R., Faaborg J. Regional forest fragmentation and the nesting success of migratory birds. Science. 1995 Mar 31;267(5206):1987–1990. doi: 10.1126/science.267.5206.1987. [DOI] [PubMed] [Google Scholar]
  4. Sillett T. S., Holmes R. T., Sherry T. W. Impacts of a global climate cycle on population dynamics of a migratory songbird. Science. 2000 Jun 16;288(5473):2040–2042. doi: 10.1126/science.288.5473.2040. [DOI] [PubMed] [Google Scholar]

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