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
Population density estimated from locations of individuals on a passive detector array Population density estimated from locations of individuals on a passive detector array
The density of a closed population of animals occupying stable home ranges may be estimated from detections of individuals on an array of detectors, using newly developed methods for spatially explicit capture–recapture. Likelihood-based methods provide estimates for data from multi-catch traps or from devices that record presence without restricting animal movement ("proximity"...
Authors
Murray G. Efford, Deanna K. Dawson, David L. Borchers
Bird population density estimated from acoustic signals Bird population density estimated from acoustic signals
Many animal species are detected primarily by sound. Although songs, calls and other sounds are often used for population assessment, as in bird point counts and hydrophone surveys of cetaceans, there are few rigorous methods for estimating population density from acoustic data. 2. The problem has several parts - distinguishing individuals, adjusting for individuals that are missed, and...
Authors
D.K. Dawson, M.G. Efford
Effects of habitat change along Breeding Bird Survey routes in the central Appalachians on Cerulean Warbler population Effects of habitat change along Breeding Bird Survey routes in the central Appalachians on Cerulean Warbler population
The cerulean warbler (Dendroica cerulea) is one of the highest priority bird species in the eastern United States because populations have declined 4.3% annually during 1966?2005 based on Breeding Bird Survey (BBS) data. Habitat loss and fragmentation due to land use changes is thought to be one of the major factors contributing to the decline. BBS routes, the primary source for...
Authors
P. McElhone, P.W. Wood, D. Dawson
Applying radar technology to migratory bird conservation and management: Strengthening and expanding a collaborative Applying radar technology to migratory bird conservation and management: Strengthening and expanding a collaborative
Executive Summary Understanding the factors affecting migratory bird and bat populations during all three phases of their life cycle—breeding, nonbreeding, and migration—is critical to species conservation planning. This includes the need for information about these species’ responses to natural challenges, as well as information about the effects of human activities and structures...
Authors
Janet M. Ruth, Albert Manville, Ron Larkin, Wylie C. Barrow, Lori Johnson-Randall, Deanna K. Dawson, Robert H. Diehl, Yufang Wang, Richard S. Sojda, Rafal Angryk, Robert W. Klaver, Reggie Mead, John Paxton, Patricia J. Heglund, Eileen Kirsch, Manuel J. Suarez, Larry Robinson, Sidney A. Gauthreaux, Carroll G. Belser, Steven J. Franke, Bruno Bruderer, Jeffrey J. Buler, Frank R. Moore, David S. Mizrahi, Robert Fogg, T. Adam Kelly, Paul M. Cryan, Tim Crum, Terry J. Schuur, Dave Krueper, Robb Diehl, Tom Will
Advancing migratory bird conservation and management by using radar: An interagency collaboration Advancing migratory bird conservation and management by using radar: An interagency collaboration
Migratory birds face many changes to the landscapes they traverse and the habitats they use. Wind turbines and communications towers, which pose hazards to birds and bats in flight, are being erected or proposed across the United States and offshore. Human activities can also destroy or threaten habitats critical to birds during migratory passage, and climate change appears to be...
Authors
Janet M. Ruth, Wylie C. Barrow, Richard S. Sojda, Deanna K. Dawson, Robert H. Diehl, Albert Manville, Michael T. Green, David J. Krueper, Scott Johnston
Predicting bird response to alternative management scenarios on a ranch in Campeche, Mexico Predicting bird response to alternative management scenarios on a ranch in Campeche, Mexico
We developed models to predict the potential response of wintering Neotropical migrant and resident bird species to alternative management scenarios, using data from point counts of birds along with habitat variables measured or estimated from remotely sensed data in a Geographic Information System. Expected numbers of occurrences at points were calculated for 100 species of birds, under...
Authors
P.A. Wood, D.K. Dawson, J.R. Sauer, M.H. Wilson
Science and Products
Filter Total Items: 54
Population density estimated from locations of individuals on a passive detector array Population density estimated from locations of individuals on a passive detector array
The density of a closed population of animals occupying stable home ranges may be estimated from detections of individuals on an array of detectors, using newly developed methods for spatially explicit capture–recapture. Likelihood-based methods provide estimates for data from multi-catch traps or from devices that record presence without restricting animal movement ("proximity"...
Authors
Murray G. Efford, Deanna K. Dawson, David L. Borchers
Bird population density estimated from acoustic signals Bird population density estimated from acoustic signals
Many animal species are detected primarily by sound. Although songs, calls and other sounds are often used for population assessment, as in bird point counts and hydrophone surveys of cetaceans, there are few rigorous methods for estimating population density from acoustic data. 2. The problem has several parts - distinguishing individuals, adjusting for individuals that are missed, and...
Authors
D.K. Dawson, M.G. Efford
Effects of habitat change along Breeding Bird Survey routes in the central Appalachians on Cerulean Warbler population Effects of habitat change along Breeding Bird Survey routes in the central Appalachians on Cerulean Warbler population
The cerulean warbler (Dendroica cerulea) is one of the highest priority bird species in the eastern United States because populations have declined 4.3% annually during 1966?2005 based on Breeding Bird Survey (BBS) data. Habitat loss and fragmentation due to land use changes is thought to be one of the major factors contributing to the decline. BBS routes, the primary source for...
Authors
P. McElhone, P.W. Wood, D. Dawson
Applying radar technology to migratory bird conservation and management: Strengthening and expanding a collaborative Applying radar technology to migratory bird conservation and management: Strengthening and expanding a collaborative
Executive Summary Understanding the factors affecting migratory bird and bat populations during all three phases of their life cycle—breeding, nonbreeding, and migration—is critical to species conservation planning. This includes the need for information about these species’ responses to natural challenges, as well as information about the effects of human activities and structures...
Authors
Janet M. Ruth, Albert Manville, Ron Larkin, Wylie C. Barrow, Lori Johnson-Randall, Deanna K. Dawson, Robert H. Diehl, Yufang Wang, Richard S. Sojda, Rafal Angryk, Robert W. Klaver, Reggie Mead, John Paxton, Patricia J. Heglund, Eileen Kirsch, Manuel J. Suarez, Larry Robinson, Sidney A. Gauthreaux, Carroll G. Belser, Steven J. Franke, Bruno Bruderer, Jeffrey J. Buler, Frank R. Moore, David S. Mizrahi, Robert Fogg, T. Adam Kelly, Paul M. Cryan, Tim Crum, Terry J. Schuur, Dave Krueper, Robb Diehl, Tom Will
Advancing migratory bird conservation and management by using radar: An interagency collaboration Advancing migratory bird conservation and management by using radar: An interagency collaboration
Migratory birds face many changes to the landscapes they traverse and the habitats they use. Wind turbines and communications towers, which pose hazards to birds and bats in flight, are being erected or proposed across the United States and offshore. Human activities can also destroy or threaten habitats critical to birds during migratory passage, and climate change appears to be...
Authors
Janet M. Ruth, Wylie C. Barrow, Richard S. Sojda, Deanna K. Dawson, Robert H. Diehl, Albert Manville, Michael T. Green, David J. Krueper, Scott Johnston
Predicting bird response to alternative management scenarios on a ranch in Campeche, Mexico Predicting bird response to alternative management scenarios on a ranch in Campeche, Mexico
We developed models to predict the potential response of wintering Neotropical migrant and resident bird species to alternative management scenarios, using data from point counts of birds along with habitat variables measured or estimated from remotely sensed data in a Geographic Information System. Expected numbers of occurrences at points were calculated for 100 species of birds, under...
Authors
P.A. Wood, D.K. Dawson, J.R. Sauer, M.H. Wilson