Swainson's Warbler Nest-Site Selection in Eastern Arkansas

Benson, Thomas J.; Anich, Nicholas M.; Brown, Jeremy D.; Bednarz, James C.

doi:10.1525/cond.2009.080074

Cited by 25 publications

(37 citation statements)

References 37 publications

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“…Specifically, Brown ct al. (2009) found density of cane stems the best predictor of presence or absence of Swainson's Warblers, while Benson et al (2009) found understory density and canopy cover most important for distinguishing nest sites from random locations. Although the reduction in cane-stem density appeared to contribute somewhat to territory abandonment after flooding, understory density was not influential.…”

Section: Discussionmentioning

confidence: 99%

“…From late April to early August 2005 through 2007, Benson et al (2009) used passive and song-playback surveys to locate territorial Swainson's Warbler males at White River National Wildlife Refuge. After locating territorial males, researchers searched for nests in those territories, found 91 active nests, and recorded data on vegetation characteristics (Martin et al 1997) and arthropod abundance at each location.…”

Section: Methodsmentioning

confidence: 99%

“…We defined a territory as occupied if a Swainson's Warbler was detected within 100 m of its original detection location. Before the flood, the mean size ofa Swainson's Warbler at our study site was 9.38 ha (Anich et al 2009), and territories were generally adjacent to at least one neighboring territory throughout our study site (Nick Anich, unpubl. data).…”

Section: Avian Surveys and Vegetation Samplingmentioning

confidence: 96%

“…In July of each year, we sampled vegetation characteristics at randomly selected locations of nests that were active between 2005 and 2007 ) and fell within a 200-m buffer centered around survey locations (2008)(2009). We chose a 200-m buffer because it encompasses a Swainson's Warbler's average home range size of 9.38 ha in Arkansas (Anich et al 2009(Anich et al ,2010a.…”

Section: Avian Surveys and Vegetation Samplingmentioning

confidence: 99%

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Mechanisms of Flood-Induced Territory Abandonment in an Obligate Ground-Foraging Bird

2013

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Large-scale disturbances, by affecting habitat suitability, can influence bird populations and communities. Although we know that disturbances can lead to population decreases and shifts in community structure, our understanding of finer-scaled mechanisms leading to these patterns is limited. We focused on why some territories remain occupied by a species following a large-scale disturbance, while others are abandoned. The Swainson's Warbler (Limnothlypis swainsonii) is especially susceptible to flooding because of its preference for nesting in thick understory vegetation and foraging in leaf litter. In 2008, a major flood inundated a study site where we have studied Swainson's Warblers since 2004. In 2008 and 2009, we resurveyed 42 Swainson's Warbler territories that were occupied between 2005 and 2007 and examined changes in habitat structure and composition and prey abundance influencing territory abandonment. Occupancy declined between the preflood and postflood surveys. Territory abandonment was associated with decreases in leaf litter cover, increases in cover of green vegetation, and decreases in density of total understory stems and giant cane (Arundinaria gigantea) between the preflood and flood periods. Despite the partial recovery of habitat structure and prey abundance after the flood, Swainson's Warbler occupancy did not recover in subsequent years. Multiple habitat variables, including leaflitter cover, density of woody stems, understory density, and prey abundance have been identified as important for Swainson's Warblers, and these results suggest that leaf litter may be espeeially important in influencing habitatselection decisions following flood disturbance. Mecanismos de Abandono del Territorio Inducido por Inundaciones en un Ave que Forrajea de Modo Obligado en el SueloResumen. Los disturbios de gran escala, al afectar la aptitud del habitat, pueden influenciar a las poblaciones y comunidades de aves. Aunque sabemos que los disturbios pueden llevar a disminuciones poblacionales y cambios en la estructura comunitaria, nuestro entendimiento de los mecanismos de sintonia fina que llevan a estos patrones es limitado. Nos enfocamos en entender por qué una especie continúa ocupando algunos territorios luego de un disturbio de gran escala, pero abandona otros. Limnothlypis swainsonii es una especie particularmente susceptible a las inundaciones debido a sus preferencias por anidar en la vegetación densa del sotobosque y por forrajear en la hojarasca. En 2008, una gran creciente inundó un sitio de estudio donde hablamos estudiado a L, swainsonii desde 2004. En 2008 y 2009, volvimos a muestrear los territorios de 42 individuos de L. swainsonii que estuvieron ocupados entre 2005 y 2007 y examinamos los cambios en la estructura y composición del habitat y la influencia de la abundancia de presas en el abandono del territorio. La ocupación disminuyó entre los muestreo previos y posteriores a la inundación. El abandono del territorio estuvo asociado con la disminución de la cobertura de la hojarasca, el au...

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Avian Surveys and Vegetation Samplingmentioning

confidence: 96%

Section: Avian Surveys and Vegetation Samplingmentioning

confidence: 99%

See 2 more Smart Citations

Mechanisms of Flood-Induced Territory Abandonment in an Obligate Ground-Foraging Bird

2013

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“…Located in Arkansas, Desha, Phillips, and Monroe counties, WRNWR, at .62,000 ha, is among the largest continuous tracts of bottomland hardwood forest remaining in the Mississippi Alluvial Valley (see Benson et al 2009). On 15 May 2007, we found a Swainson's warbler nest 1.6 m above the ground in a cane (Arundinaria gigantea) plant with four warbler eggs.…”

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confidence: 99%