Reproductive phenology of the Acadian flycatcher (Empidonax virescens), a Neotropical migratory bird species, across an urban to rural gradient in central Ohio, USA

Please use this identifier to cite or link to this item:

Show simple item record

Files Size Format View
SHUSTACK_2008.pdf 836.9Kb PDF View/Open

dc.contributor.advisor Rodewald, Amanda
dc.creator Shustack, Daniel 2008-06-10T20:27:33Z 2008-06-10T20:27:33Z 2008-04
dc.description FAES and Human Ecology: 1st Place (The Ohio State University Edward F. Hayes Graduate Research Forum) en_US
dc.description.abstract The tendency for birds to reproduce earlier in the season has been observed in urban compared to rural populations, but these observations are limited primarily to species that spend all or most of the year in North America (i.e., resident or short-distance migrants). However, the factors that influence the reproductive timing of resident and short-distance migrants are unlikely to have the same influence on Neotropical migrants, a group of birds requiring conservation action due to long-term population declines. To understand the relationship between urbanization and reproductive phenology or timing of a Neotropical migratory bird species I (1) described the pattern of reproductive phenology in Neotropical migratory bird species across an urban to rural gradient, (2) assessed the reproductive consequences of varied breeding phenology, and (3) evaluated the extent to which alternative factors might explain differences in reproductive phenology. Data were collected between 2001 and 2007 on 35 different forests spanning an urban to rural gradient in central Ohio, USA. I used Acadian flycatchers (Empidonax virescens) as a model species. Birds were captured, marked, measured, released, and monitored throughout the breeding seasons. The general pattern of breeding phenology was opposite that found in most resident and short-distance migrant birds. Birds arrived later, initiated clutches later, and finished nesting earlier than birds breeding in more urban forests. The combination of delayed clutch initiation and earlier completion of nesting activity resulted in an abbreviated nesting season associated with urbanization. Ultimately, this attenuated nesting season reduced the number of nests attempted and young produced by urban-breeding birds and shifted the timing of fledging, with the first fledglings being produced relatively later in the breeding season. The underlying causes of the phenological differences are less clear. One possibility supported by my data is that urban forests were disproportionately settled by small females, which initiated their first clutches later in the nesting season than larger females. This study provides the first evidence that urbanization is associated with attenuated nesting seasons for Neotropical migratory birds and that this shift in breeding phenology may have reproductive consequences. en_US
dc.language.iso en_US en_US
dc.relation.ispartofseries 2008 Edward F. Hayes Graduate Research Forum. 22nd en_US
dc.subject urbanization en_US
dc.subject breeding biology en_US
dc.subject birds en_US
dc.subject reproductive phenology en_US
dc.subject urban/rural gradient en_US
dc.subject clutch initiation en_US
dc.title Reproductive phenology of the Acadian flycatcher (Empidonax virescens), a Neotropical migratory bird species, across an urban to rural gradient in central Ohio, USA en_US
dc.type Article en_US
dc.description.embargo A five-year embargo was granted for this item. en_US Attribution-NonCommercial-NoDerivs 3.0 Unported en_US
dc.rights.ccuri en_US
Attribution-NonCommercial-NoDerivs 3.0 Unported This item is licensed under a Creative Commons License:
Attribution-NonCommercial-NoDerivs 3.0 Unported