Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

EVIDENCE OF LARGE-SCALE SOURCE––SINK DYNAMICS AND LONG-DISTANCE DISPERSAL AMONG WOOD THRUSH POPULATIONS

EVIDENCE OF LARGE-SCALE SOURCE––SINK DYNAMICS AND LONG-DISTANCE DISPERSAL AMONG WOOD THRUSH... 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ecology Ecological Society of America

EVIDENCE OF LARGE-SCALE SOURCE––SINK DYNAMICS AND LONG-DISTANCE DISPERSAL AMONG WOOD THRUSH POPULATIONS

Ecology , Volume 87 (12) – Dec 1, 2006

Loading next page...
 
/lp/ecological-society-of-america/evidence-of-large-scale-source-sink-dynamics-and-long-distance-sdlUTyzfHp

References

References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.

Publisher
Ecological Society of America
Copyright
Copyright © 2006 by the Ecological Society of America
Subject
Articles
ISSN
0012-9658
DOI
10.1890/0012-9658%282006%2987%5B3029:EOLSDA%5D2.0.CO%3B2
Publisher site
See Article on Publisher Site

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.

Journal

EcologyEcological Society of America

Published: Dec 1, 2006

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

There are no references for this article.