Deanna Dawson
Deanna is a emeritus with the Eastern Ecological Science Center located at Laurel, MD.
An experienced field ornithologist, her current research uses remote sensing techniques to sample the spatiotemporal distribution of birds, primarily during migration periods. She collaborates in research that analyzes data from weather surveillance radars to map the densities of nocturnal migrants at daytime stopover sites, and uses acoustic data to quantify and model the abundance of migrants aloft. She also works on methods to estimate animal densities from sounds recorded on microphone arrays, applying them to recordings of bird song made across the Patuxent Research Refuge during the nesting season.
Science and Products
Filter Total Items: 54
Habitat area requirements of breeding forest birds of the middle Atlantic states Habitat area requirements of breeding forest birds of the middle Atlantic states
Conservation of birds requires an understanding of their nesting requirements, including area as well as structural characteristics of the habitat. Previous studies have shown that many neotropical migrant bird species seem to depend on extensive forested areas, but the specific area requirements of individual species have not been clarified sufficiently to aid in design and management...
Authors
Chandler S. Robbins, Deanna K. Dawson, Barbara A. Dowell
Comparisons of winter bird populations in extensive neotropical forest and in isolated fragments Comparisons of winter bird populations in extensive neotropical forest and in isolated fragments
No abstract available.
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson, R. Coates-Estrada, J. Colon, F. Espinoza, J. Rodriguez, R. Sutton, T. Vargas, Dieter Weyer
Atlas de aves: Un metodo para documentar distribucion y seguir poblaciones Atlas de aves: Un metodo para documentar distribucion y seguir poblaciones
Los Atlas de Aves son proyectos nacionales o regionalies para trazar en mapas la distribucion en reproduccion de cada especie de ave. Ese procedimiento se esta usando en Europa, Australia, Nueva Zelanda, Norteamerica, y partes de Africa. El tama?o de los cuadrados varia de medio grado de latitud y Iongitud hasta 5 x 5 km. El trabajo de campo de cada proyecto exige aproxlmadamente cinco a...
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson
Comparison of neotropical winter bird populations in isolated patches versus extensive forest Comparison of neotropical winter bird populations in isolated patches versus extensive forest
Wintering birds were captured with mist nets at 12 pairs of forested sites in the New World tropics in 1984 and 1985 to compare populations in small isolated woodlands (generally 5-50 ha) with those in extensive forests (> 1,000 ha). Net-hours of effort were similar in large and small sites, as were total birds captured and banded, but species composition was very different. Members of...
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson, J. Colon, F. Espinoza, J. Rodriguez, R. Sutton, T. Vargas
A search for stability gradients in North American breeding bird communities A search for stability gradients in North American breeding bird communities
To search for the existence of stability gradients in North American breeding land bird communities we operationally defined stability (after Jarvinen 1979) as year-to-year persistence in species composition and distribution of species abundances. From the census data for 174 study plots we derived nine indices that estimate the annual variability of species composition, the species...
Authors
B.R. Noon, D.K. Dawson, J.P. Kelly
Brewer's sparrow (Spizella breweri) Brewer's sparrow (Spizella breweri)
Many of the known recoverable coal reserves in the Western United States occur within the breeding and wintering range of the Brewer's sparrow. Although the species is common throughout much of its breeding range, local and regional populations may be adversely affected due to mining-related disturbances and habitat loss. The species may serve as a valuable indicator of the impacts of...
Authors
D.K. Dawson
Science and Products
Filter Total Items: 54
Habitat area requirements of breeding forest birds of the middle Atlantic states Habitat area requirements of breeding forest birds of the middle Atlantic states
Conservation of birds requires an understanding of their nesting requirements, including area as well as structural characteristics of the habitat. Previous studies have shown that many neotropical migrant bird species seem to depend on extensive forested areas, but the specific area requirements of individual species have not been clarified sufficiently to aid in design and management...
Authors
Chandler S. Robbins, Deanna K. Dawson, Barbara A. Dowell
Comparisons of winter bird populations in extensive neotropical forest and in isolated fragments Comparisons of winter bird populations in extensive neotropical forest and in isolated fragments
No abstract available.
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson, R. Coates-Estrada, J. Colon, F. Espinoza, J. Rodriguez, R. Sutton, T. Vargas, Dieter Weyer
Atlas de aves: Un metodo para documentar distribucion y seguir poblaciones Atlas de aves: Un metodo para documentar distribucion y seguir poblaciones
Los Atlas de Aves son proyectos nacionales o regionalies para trazar en mapas la distribucion en reproduccion de cada especie de ave. Ese procedimiento se esta usando en Europa, Australia, Nueva Zelanda, Norteamerica, y partes de Africa. El tama?o de los cuadrados varia de medio grado de latitud y Iongitud hasta 5 x 5 km. El trabajo de campo de cada proyecto exige aproxlmadamente cinco a...
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson
Comparison of neotropical winter bird populations in isolated patches versus extensive forest Comparison of neotropical winter bird populations in isolated patches versus extensive forest
Wintering birds were captured with mist nets at 12 pairs of forested sites in the New World tropics in 1984 and 1985 to compare populations in small isolated woodlands (generally 5-50 ha) with those in extensive forests (> 1,000 ha). Net-hours of effort were similar in large and small sites, as were total birds captured and banded, but species composition was very different. Members of...
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson, J. Colon, F. Espinoza, J. Rodriguez, R. Sutton, T. Vargas
A search for stability gradients in North American breeding bird communities A search for stability gradients in North American breeding bird communities
To search for the existence of stability gradients in North American breeding land bird communities we operationally defined stability (after Jarvinen 1979) as year-to-year persistence in species composition and distribution of species abundances. From the census data for 174 study plots we derived nine indices that estimate the annual variability of species composition, the species...
Authors
B.R. Noon, D.K. Dawson, J.P. Kelly
Brewer's sparrow (Spizella breweri) Brewer's sparrow (Spizella breweri)
Many of the known recoverable coal reserves in the Western United States occur within the breeding and wintering range of the Brewer's sparrow. Although the species is common throughout much of its breeding range, local and regional populations may be adversely affected due to mining-related disturbances and habitat loss. The species may serve as a valuable indicator of the impacts of...
Authors
D.K. Dawson