Tittler20063029

Référence

Tittler, R., Fahrig, L., Villard, M.-A. (2006) Evidence of large-scale source-sink dynamics and long-distance dispersal among Wood Thrush populations. Ecology, 87(12):3029-3036. (Scopus )

Résumé

Source-sink dynamics are commonly thought to occur among Wood Thrush (Hylocichla mustelina) and other songbird populations, allowing for the persistence of populations with negative growth rates ("sinks") through immigration from populations with positive growth rates ("sources"). Knowledge of source-sink dynamics is important for management and conservation because the removal of source habitat should result in the extinction of dependent sinks. However, since research has focused on identifying individual sources/sink populations, not source-sink pairs, we cannot predict these effects or the scale over which they occur. We posit that, when dispersal occurs from a source to a sink year after year, there will be a one-year time-lagged correlation in abundance between the two populations. This should occur for populations separated by distances over which juveniles disperse. Using the North American Breeding Bird Survey data, we tested for such time-lagged correlations between paired Wood Thrush populations from 10 to 200 km apart. Populations were linked with a one-year time lag over distances from 60 to 80 km, indicating that dispersal and source-sink dynamics may occur over these long distances. There was also a declining trend in forest cover from sources to sinks. Conservation and management strategies should therefore be designed at large scales, with consideration for source-sink dynamics and forest cover. © 2006 by the Ecological Society of America.

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@ARTICLE { Tittler20063029,
    AUTHOR = { Tittler, R. and Fahrig, L. and Villard, M.-A. },
    TITLE = { Evidence of large-scale source-sink dynamics and long-distance dispersal among Wood Thrush populations },
    JOURNAL = { Ecology },
    YEAR = { 2006 },
    VOLUME = { 87 },
    NUMBER = { 12 },
    PAGES = { 3029-3036 },
    NOTE = { cited By 38 },
    ABSTRACT = { Source-sink dynamics are commonly thought to occur among Wood Thrush (Hylocichla mustelina) and other songbird populations, allowing for the persistence of populations with negative growth rates ("sinks") through immigration from populations with positive growth rates ("sources"). Knowledge of source-sink dynamics is important for management and conservation because the removal of source habitat should result in the extinction of dependent sinks. However, since research has focused on identifying individual sources/sink populations, not source-sink pairs, we cannot predict these effects or the scale over which they occur. We posit that, when dispersal occurs from a source to a sink year after year, there will be a one-year time-lagged correlation in abundance between the two populations. This should occur for populations separated by distances over which juveniles disperse. Using the North American Breeding Bird Survey data, we tested for such time-lagged correlations between paired Wood Thrush populations from 10 to 200 km apart. Populations were linked with a one-year time lag over distances from 60 to 80 km, indicating that dispersal and source-sink dynamics may occur over these long distances. There was also a declining trend in forest cover from sources to sinks. Conservation and management strategies should therefore be designed at large scales, with consideration for source-sink dynamics and forest cover. © 2006 by the Ecological Society of America. },
    AFFILIATION = { Geomatics and Landscape Ecology Research Laboratory, Ottawa-Carleton Institute of Biology, Carleton University, Ottawa, Ont. K1S 5B6, Canada; Canada Research Chair in Landscape Conservation, Département de Biologie, Université de Moncton, Moncton, NB E1A 3E9, Canada },
    AUTHOR_KEYWORDS = { Asymmetrical dispersal; Dispersal distance; Hylocichla mustelina; Juvenile and natal dispersal; Long-distance dispersal; North American Breeding Bird Survey; Source-sink dynamics; Time lag; Wood Thrush },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1890/0012-9658(2006)87[3029:EOLSDA]2.0.CO;2 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-33845685969&doi=10.1890%2f0012-9658%282006%2987%5b3029%3aEOLSDA%5d2.0.CO%3b2&partnerID=40&md5=6c4908b7567948b089973922eeb8f0d0 },
}

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