A Ten-Year Study of the Stopover Patterns of Migratory Passerines during Fall Migration on Appledore Island, Maine

Morris, Sara R.; Holmes, David W.; Richmond, Milo E.

doi:10.2307/1369157

Cited by 108 publications

(68 citation statements)

References 35 publications

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“…Based on ANCOVA analyses, we also found interannual variation in initial energetic condition for most species. Morris et al (1996) had similar findings of annual variation in recapture proportions, stopover duration, and mass changes for some, but not all, species among the migrant assemblage in Maine. However, Kuenzi et al (1991) found evidence for variation in recapture proportions but not stopover duration or mass changes among spring migrants in Mississippi.…”

Section: Discussion Stopover Patterns In the Mountain-shrubland Habitatsupporting

confidence: 58%

Stopover Ecology of Autumn Landbird Migrants in the Boise Foothills of Southwestern Idaho

Carlisle

Kaltenecker

Swanson

2005

Condor

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Published as "Stopover Ecology of Autumn Landbird Migrants in the Boise Foothills of Southwestern Idaho" in The Condor 107(2):244-258. © 2005 by the Regents of the University of California. Copying and permissions notice: Authorization to copy this content beyond fair use (as specified in Sections 107 and 108 of the U. S. Copyright Law) for internal or personal use, or the internal or personal use of specific clients, is granted by the Regents of the University of California for libraries and other users, provided that they are registered with and pay the specified fee via Rightslink® on Caliber (http://caliber.ucpress.net/) or directly with the Copyright Clearance Center, http://www.copyright.com. DOI: 10.1650/7808[244] Abstract. The topography of western North America provides a complex landscape for landbird migrants, and stopover patterns in this region are poorly understood. We examined seven years of stopover data (1997)(1998)(1999)(2000)(2001)(2002)(2003)) from a montane area in southwestern Idaho to determine whether this area provides suitable stopover habitat. We compared the proportion of birds recaptured, stopover duration, and changes in energetic condition within and among species and between two mist-netting sites located in different habitats. The proportion of birds recaptured ranged from zero to over 20%, and fewer than 5% of individuals were recaptured in most species. Mean minimum stopover durations from recapture data ranged from 1 to 10 days; most species averaged less than 6 days. Stopover duration estimates from open-population models were comparable but generally greater than estimates from recapture data. As found in stopover studies from other regions, stopover metrics varied within and among species in Idaho. However, most migrants in this study exhibited an ability to gain mass, evidenced both by recapture data and by regression of energetic condition against time since sunrise. These data imply that montane habitats in Idaho are suitable stopover sites. It follows that these habitats might serve an important role for many landbird migrants during the period of late summer molt and autumn migration, a time when many lowland areas of the West, including some riparian systems, are especially arid. We suggest that including montane nonriparian habitats in future stopover ecology studies will allow for a more complete understanding of migrant habitat needs in the West.Key words: habitat suitability, Idaho, Intermountain West, landbird migration, stopover ecology. Ecología de Aves Migrantes de Otoño Durante Períodos de Escala en el Piedemonte de Boise, Suroeste de IdahoResumen. La topografía del oeste de Norte América representa un paisaje complejo para las aves terrestres migratorias, y los patrones de escala migratoria en esta región son poco conocidos. En este estudio examinamos datos de escalas migratorias colectados a través de siete años (1997)(1998)(1999)(2000)(2001)(2002)(2003) en un área montana del suroeste de Idaho para determinar si esta área provee hábitats de escala adecuado...

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Section: Discussion Stopover Patterns In the Mountain-shrubland Habitatsupporting

confidence: 58%

Stopover Ecology of Autumn Landbird Migrants in the Boise Foothills of Southwestern Idaho

Carlisle

Kaltenecker

Swanson

2005

Condor

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“…First, adult birds may disrupt their nocturnal flights to land at suitable inland stopover areas well in advance of a barrier, as suggested by others (Drury and Keith 1962;Ralph 1971;Alerstam 1978). Direct evidence of this is lacking, but age ratios of migrants are often highly skewed towards hatchyear birds in coastal areas during autumn migration (Drury and Keith 1962;Murray 1966;Ralph 1971Ralph , 1981Morris et al 1996;Woodrey and Moore 1997). Second, migrants that do land at or fly over the immediate coast may reorient and make reverse movements inland.…”

Section: Autumn Migrant Distributionsmentioning

confidence: 99%

Migrant–habitat relationships during stopover along an ecological barrier: extrinsic constraints and conservation implications

2011

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For migrating land birds, the influence of extrinsic factors (e.g., weather and energetic condition) on stopover site selection relative to factors intrinsic to habitat (e.g., food) may be especially acute after crossing a large ecological barrier. We quantified bird distributions during spring and autumn migration along the coast of Mississippi after birds had crossed the Gulf of Mexico using weather surveillance radar data to test our prediction that bird distributions would be less closely associated with a proximate cue to intrinsic habitat quality (the amount of forest cover in the landscape) as proximity to the coastline increased during spring. Relative bird density was positively associated with the amount of hardwood forest in the landscape during both seasons, and broadly with proximity to the coastline during spring. In spring, bird density was less closely associated with the amount of hardwood forest with greater proximity to the coast. Due to extrinsic constraints associated with crossing the Gulf of Mexico during spring, most migrants appear to select sites for resting within 18 km from the coastline during their initial landfall and seek resource-rich habitats for refueling further inland during subsequent stopovers. During autumn, most birds seek resource-rich stopover sites inland from the coast in which to refuel before crossing the Gulf of Mexico.Because stopover habitat may be limiting to some populations of migratory land birds, the disproportionately high rates of human development and deforestation along with the reduced availability and amount of protection of forests in near-coastal areas create urgency for the conservation of forested stopover sites along the Gulf of Mexico.

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“…Although we surveyed points multiple times during a single year, successive counts at any particular point were separated by approximately one month. Estimated mean stopover lengths for migratory land birds at other sites are much shorter than this time interval, generally less than five days (Kuenzi et al 1991, Morris et al 1996, Woodrey and Moore 1997, Yong and Moore 1997), so we considered successive counts to be independent replicates (Hutto 1985b).…”

Section: Migratory Land Birdsmentioning

confidence: 99%

Scale-Dependent Habitat Use by Fall Migratory Birds: Vegetation Structure, Floristics, and Geography

Deppe¹,

Rotenberry

2008

Ecological Monographs

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Abstract. Animal habitat selection is a central focus of ecology and conservation biology. Understanding habitat associations in migratory animals is particularly complicated because individuals have variable habitat requirements during the annual cycle, across their geographic range, along migratory routes, and at multiple spatial scales. We studied habitat associations of 16 fall Nearctic-Neotropical migratory land birds at two spatial scales at a stopover site along the northern Yucatan coast to examine scale-dependent habitat use, identify proximate cues shaping birds' distributions, and evaluate similarities in habitat use between our tropical stopover site and temperate sites. We addressed scale-dependent habitat associations in two ways, by (1) quantifying species' distributions among and within broad vegetation types and (2) comparing migrants' associations with architectural gradients between the two spatial scales. We also evaluated the relative importance of vegetation architecture and floristics in explaining migrants' distributions within broad coastal vegetation types.Bird species were nonrandomly distributed among broad-and fine-scale vegetation types, and patterns of habitat use varied between the two scales. Moreover, birds had different preferences for vegetation architecture at the two scales, which may reflect trade-offs between competing demands and/or reduced variation in vegetation at the small scale in our study. These findings illustrate the manner in which spatial scale and range of vegetation variation influence perceptions of animal-habitat associations. Within broad coastal vegetation types birds refined their distributions in relation to architectural and floristic attributes, which provided them with redundant and/or complementary information regarding the distribution of suitable habitat. We suggest that the relative importance of architecture and floristics is likely scale-dependent. Habitat use at our site was similar to that observed at temperate stopover sites for almost all species, indicating that habitat affinities are maintained along the migratory route for these eastern populations despite latitudinal changes in environmental factors. We highlight examples of similar patterns observed in other migratory and nonmigratory animals to illustrate the generality of these patterns beyond en route land birds and our tropical site. We also indicate where we expect to see differences and outline areas of research that merit greater attention in order to advance our understanding of animal habitat selection.

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A Ten-Year Study of the Stopover Patterns of Migratory Passerines during Fall Migration on Appledore Island, Maine

Cited by 108 publications

References 35 publications

Stopover Ecology of Autumn Landbird Migrants in the Boise Foothills of Southwestern Idaho

Stopover Ecology of Autumn Landbird Migrants in the Boise Foothills of Southwestern Idaho

Migrant–habitat relationships during stopover along an ecological barrier: extrinsic constraints and conservation implications

Scale-Dependent Habitat Use by Fall Migratory Birds: Vegetation Structure, Floristics, and Geography

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