Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Extracting long‐term patterns of population changes from sporadic counts of migrant birds
Declines of many North American birds are of conservation concern. For almost 40 years, experienced birders have kept daily counts of migrant landbirds during visits to Seal and Brier Islands, both of which are off Nova Scotia's southern tip. Here we assess the utility of Generalized Additive Models (GAMs) to extract patterns of population change of a common migrant to Seal Island, the Ruby‐crowned Kinglet, while controlling for other influences including season, weather and effort. We also demonstrate, using counts of the Kinglet from Brier Island as well as counts of another common migrant, the Yellow‐rumped Warbler, how our GAM methods can combine data from different geographic areas or distinct species. Most existing analyses of similar long‐term data sets have used linear models to estimate trends. Our results and comparisons suggest that GAMs are a powerful way of extracting more information from such data. Copyright © 2009 John Wiley & Sons, Ltd.
Extracting long‐term patterns of population changes from sporadic counts of migrant birds
Declines of many North American birds are of conservation concern. For almost 40 years, experienced birders have kept daily counts of migrant landbirds during visits to Seal and Brier Islands, both of which are off Nova Scotia's southern tip. Here we assess the utility of Generalized Additive Models (GAMs) to extract patterns of population change of a common migrant to Seal Island, the Ruby‐crowned Kinglet, while controlling for other influences including season, weather and effort. We also demonstrate, using counts of the Kinglet from Brier Island as well as counts of another common migrant, the Yellow‐rumped Warbler, how our GAM methods can combine data from different geographic areas or distinct species. Most existing analyses of similar long‐term data sets have used linear models to estimate trends. Our results and comparisons suggest that GAMs are a powerful way of extracting more information from such data. Copyright © 2009 John Wiley & Sons, Ltd.
Extracting long‐term patterns of population changes from sporadic counts of migrant birds
Flemming, Joanna Mills (Autor:in) / Cantoni, Eva (Autor:in) / Field, Christopher (Autor:in) / McLaren, Ian (Autor:in)
Environmetrics ; 21 ; 482-492
01.08.2010
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Low migratory connectivity is common in long‐distance migrant birds
| British Library Online Contents | 2017
Extracting Migrant Flight Orientation Profiles Using Polarimetric Radar
| Online Contents | 2015
Effects of Group-selection Timber Harvest in Bottomland Hardwoods on Fall Migrant Birds
| British Library Online Contents | 1999
Birds of a feather: Interpolating distribution patterns of urban birds
| Online Contents | 2008