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
Changing land use: Problems and opportunities Changing land use: Problems and opportunities
Under the pressure of increasing human populations and expanding demands for food and fiber, native tropical and temperate habitats are becoming more restricted, and populations of many resident and migratory birds are declining. Mist net surveys of 111 forest and agricultural sites in Mexico, Belize, and Guatemala show that some migratory species use a wide variety of habitats during...
Authors
C.S. Robbins, D.K. Dawson, B.A. Dowell
Point count length and detection of forest neotropical migrant birds Point count length and detection of forest neotropical migrant birds
Comparisons of bird abundances among years or among habitats assume that the rates at which birds are detected and counted are constant within species. We use point count data collected in forests of the Mid-Atlantic states to estimate detection probabilities for Neotropical migrant bird species as a function of count length. For some species, significant differences existed among years...
Authors
D.K. Dawson, D. R. Smith, C.S. Robbins
Estimating bird species richness from capture and count data Estimating bird species richness from capture and count data
We used capture-recapture methods to estimate bird species richness from mist-net and point-count data from a study area in Campeche, Mexico. We estimated species richness separately for each survey technique for two habitats, forest and pasture, in six sampling periods. We then estimated richness based on species' detections by either technique, and estimated the proportion of species...
Authors
D.K. Dawson, J.R. Sauer, P.A. Wood, M. Berlanga, M.H. Wilson, C.S. Robbins
Point count length and detection of forest neotropical migrant birds Point count length and detection of forest neotropical migrant birds
No abstract available at this time
Authors
D.K. Dawson, D. R. Smith, C.S. Robbins
Habitat constraints on the distribution of passerine residents and neotropical migrants in Latin America Habitat constraints on the distribution of passerine residents and neotropical migrants in Latin America
With continuing tropical deforestation, there is increased concern for birds that depend on forest habitats in Latin America. During the past 10 northern winters, we have conducted quantitative studies of habitat use by wintering migrant songbirds and by residents in the Greater Antilles, Mexico, Central America, and northern South America. Many migrants, but few residents, winter in...
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson
Predicting the distribution of breeding forest birds in a fragmented landscape Predicting the distribution of breeding forest birds in a fragmented landscape
No abstract available.
Authors
D.K. Dawson, L.J. Darr, C.S. Robbins
Science and Products
Filter Total Items: 54
Changing land use: Problems and opportunities Changing land use: Problems and opportunities
Under the pressure of increasing human populations and expanding demands for food and fiber, native tropical and temperate habitats are becoming more restricted, and populations of many resident and migratory birds are declining. Mist net surveys of 111 forest and agricultural sites in Mexico, Belize, and Guatemala show that some migratory species use a wide variety of habitats during...
Authors
C.S. Robbins, D.K. Dawson, B.A. Dowell
Point count length and detection of forest neotropical migrant birds Point count length and detection of forest neotropical migrant birds
Comparisons of bird abundances among years or among habitats assume that the rates at which birds are detected and counted are constant within species. We use point count data collected in forests of the Mid-Atlantic states to estimate detection probabilities for Neotropical migrant bird species as a function of count length. For some species, significant differences existed among years...
Authors
D.K. Dawson, D. R. Smith, C.S. Robbins
Estimating bird species richness from capture and count data Estimating bird species richness from capture and count data
We used capture-recapture methods to estimate bird species richness from mist-net and point-count data from a study area in Campeche, Mexico. We estimated species richness separately for each survey technique for two habitats, forest and pasture, in six sampling periods. We then estimated richness based on species' detections by either technique, and estimated the proportion of species...
Authors
D.K. Dawson, J.R. Sauer, P.A. Wood, M. Berlanga, M.H. Wilson, C.S. Robbins
Point count length and detection of forest neotropical migrant birds Point count length and detection of forest neotropical migrant birds
No abstract available at this time
Authors
D.K. Dawson, D. R. Smith, C.S. Robbins
Habitat constraints on the distribution of passerine residents and neotropical migrants in Latin America Habitat constraints on the distribution of passerine residents and neotropical migrants in Latin America
With continuing tropical deforestation, there is increased concern for birds that depend on forest habitats in Latin America. During the past 10 northern winters, we have conducted quantitative studies of habitat use by wintering migrant songbirds and by residents in the Greater Antilles, Mexico, Central America, and northern South America. Many migrants, but few residents, winter in...
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson
Predicting the distribution of breeding forest birds in a fragmented landscape Predicting the distribution of breeding forest birds in a fragmented landscape
No abstract available.
Authors
D.K. Dawson, L.J. Darr, C.S. Robbins