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West Nile virus emergence and large-scale declines of North American bird populations

Nature volume 447, pages 710713 (07 June 2007) | Download Citation

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Abstract

Emerging infectious diseases present a formidable challenge to the conservation of native species in the twenty-first century1. Diseases caused by introduced pathogens have had large impacts on species abundances2, including the American chestnut3, Hawaiian bird species4 and many amphibians5. Changes in host population sizes can lead to marked shifts in community composition and ecosystem functioning3,4,6. However, identifying the impacts of an introduced disease and distinguishing it from other forces that influence population dynamics (for example, climate7) is challenging and requires abundance data that extend before and after the introduction2,5. Here we use 26 yr of Breeding Bird Survey (BBS)8 data to determine the impact of West Nile virus (WNV) on 20 potential avian hosts across North America. We demonstrate significant changes in population trajectories for seven species from four families that concur with a priori predictions and the spatio-temporal intensity of pathogen transmission. The American crow population declined by up to 45% since WNV arrival, and only two of the seven species with documented impact recovered to pre-WNV levels by 2005. Our findings demonstrate the potential impacts of an invasive species on a diverse faunal assemblage across broad geographical scales, and underscore the complexity of subsequent community response.

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References

  1. 1.

    , & Emerging infectious diseases of wildlife—threats to biodiversity and human health. Science 287, 443–449 (2000)

  2. 2.

    & Density-dependent decline of host abundance resulting from a new infectious disease. Proc. Natl Acad. Sci. USA 97, 5303–5306 (2000)

  3. 3.

    Chestnut: history and ecology of a transformed species. J. Biogeogr. 29, 1517–1530 (2002)

  4. 4.

    , , & The epizootiology and ecological significance of malaria in Hawaiian (USA) land birds. Ecol. Monogr. 56, 327–344 (1986)

  5. 5.

    et al. Emerging infectious disease and the loss of biodiversity in a Neotropical amphibian community. Proc. Natl Acad. Sci. USA 103, 3165–3170 (2006)

  6. 6.

    et al. Effects of biodiversity on ecosystem functioning: A consensus of current knowledge. Ecol. Monogr. 75, 3–35 (2005)

  7. 7.

    et al. Amphibian population declines at savannah river site are linked to climate, not chytridiomycosis. Ecology 86, 3232–3237 (2005)

  8. 8.

    , & The North American Breeding Bird Survey, Results and Analysis 1966–2005. Version 6.2. 2006 〈〉 (2005)

  9. 9.

    & Christmas bird count data suggest West Nile virus may not be a conservation issue in Northeastern United States. Am. Birds 57, 14–21 (2003)

  10. 10.

    et al. West Nile virus and wildlife. Bioscience 54, 393–402 (2004)

  11. 11.

    Center for Disease Control and Prevention. West Nile virus: Statistics, surveillance, and control 〈〉 (2006)

  12. 12.

    et al. Experimental infection of North American birds with the New York 1999 strain of West Nile virus. Emerg. Infect. Dis. 9, 311–322 (2003)

  13. 13.

    , & West Nile virus devastates an American crow population. Condor 107, 128–132 (2005)

  14. 14.

    et al. West Nile virus: pending crisis for greater sage-grouse. Ecol. Lett. 7, 704–713 (2004)

  15. 15.

    & Combined data of project FeederWatch and the Christmas bird count indicate declines of chickadees and corvids: possible impacts of West Nile virus. Am. Birds 57, 22–25 (2003)

  16. 16.

    , , & Impact of West Nile virus on American crows in the northeastern United States, and its relevance to existing monitoring programs. Ecohealth 1, 60–68 (2004)

  17. 17.

    , , , & Host heterogeneity dominates West Nile virus transmission. Proc. R. Soc. B 273, 2327–2333 (2006)

  18. 18.

    , & (eds) Avian Conservation and Ecology in an Urbanizing World (Kluwer, New York, New York, 2001)

  19. 19.

    , , , & (eds) Rates, Trends, Causes, and Consequences of Urban Land-Use Change in the United States (US Geological Survey, Denver, Colorado, 2006)

  20. 20.

    , , , & West Nile virus epidemics in North America are driven by shifts in mosquito feeding behavior. PLoS Biol. 4, e82 (2006)

  21. 21.

    , , & Pathogenicity, serological responses, and diagnosis of experimental and natural malarial infections in native Hawaiian thrushes. Condor 103, 209–218 (2001)

  22. 22.

    , , & in Japanese Encephalitis and West Nile Viruses Vol. 267 Current Topics in Microbiology and Immunology (eds Mackenzie, J., Barrett, A. & Deubel, V.) 241–252 (Springer, Berlin, 2002)

  23. 23.

    & Mosquito: a natural history of our most persistent and deadly foe (Hyperion, New York, 2001)

  24. 24.

    et al. Role of corvids in epidemiology of West Nile virus in southern California. J. Med. Entomol. 43, 356–367 (2006)

  25. 25.

    , , , & Host feeding patterns of Culex mosquitoes and West Nile virus transmission, northeastern United States. Emerg. Infect. Dis. 12, 468–474 (2006)

  26. 26.

    et al. Consequences of changing biodiversity. Nature 405, 234–242 (2000)

  27. 27.

    Uncertainty and variability in demography and population growth: A hierarchical approach. Ecology 84, 1370–1381 (2003)

  28. 28.

    & A hierarchical analysis of population change with application to Cerulean Warblers. Ecology 83, 2832–2840 (2002)

  29. 29.

    , , & d. Bayesian measures of model complexity and fit (with discussion). J. Roy. Stat. Soc. B. 64, 583–640 (2002)

  30. 30.

    in Markov Chain Monte Carlo in Practice (eds Gilks, W. R., Spiegelhalter, D. J. & Richardson, S.) 145–158 (Chapman and Hall, London, 2006)

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Acknowledgements

This study is based on work supported by the Smithsonian Institution, The National Science Foundation under a grant awarded to S.L.L., a NIAID contract, and the joint NSF-NIH Ecology of Infectious Disease program (A.M.K., P.P.M). We thank C. Robbins and the United State Geological Survey for creating and maintaining the BBS monitoring programme. We also thank all BBS data support and volunteers, as well as C. Calder, J. S. Clark, W. A. Link, J. R. Sauer, C. Studds and W. Thogmartin for comments.

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Affiliations

  1. Smithsonian Migratory Bird Center, National Zoological Park, Washington DC 20008, USA

    • Shannon L. LaDeau
    •  & Peter P. Marra
  2. Consortium for Conservation Medicine, New York, New York 10001, USA

    • A. Marm Kilpatrick

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Competing interests

Reprints and permissions information is available at www.nature.com/reprints. The authors declare no competing financial interests.

Corresponding author

Correspondence to Shannon L. LaDeau.

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    Supplementary Information

    This file contains Supplementary Figures 1-3 with Legends, Supplementary Methods Supplementary Tables 1-2 and additional references.

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https://doi.org/10.1038/nature05829

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