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
Occupancy in continuous habitat Occupancy in continuous habitat
The probability that a site has at least one individual of a species ('occupancy') has come to be widely used as a state variable for animal population monitoring. The available statistical theory for estimation when detection is imperfect applies particularly to habitat patches or islands, although it is also used for arbitrary plots in continuous habitat. The probability that such a...
Authors
Murray G. Efford, Deanna K. Dawson
Radar analysis of fall bird migration stopover sites in the Northeastern U.S. Radar analysis of fall bird migration stopover sites in the Northeastern U.S.
The national network of weather surveillance radars (WSR-88D/NEXRAD) detects birds in flight, and has proven to be a useful remote-sensing tool for ornithological study. We used data collected during Fall 2008 and 2009 by 16 WSR-88D and 3 terminal Doppler weather radars in the northeastern U.S. (U.S. Fish and Wildlife Service Region 5) to study the spatial distribution of landbirds...
Authors
Jeffrey J. Butler, Deanna K. Dawson
Cerulean Warbler Technical Group: Coordinating international research and conservation Cerulean Warbler Technical Group: Coordinating international research and conservation
Effective conservation for species of concern requires interchange and collaboration among conservationists and stakeholders. The Cerulean Warbler Technical Group (CWTG) is a consortium of biologists and managers from government agencies, non-governmental organizations, academia, and industry, who are dedicated to finding pro-active, science-based solutions for conservation of the...
Authors
D.K. Dawson, T.B. Wigley, P.D. Keyser
Effects of stop-level habitat change on cerulean warbler detections along breeding bird survey routes in the central appalachians Effects of stop-level habitat change on cerulean warbler detections along breeding bird survey routes in the central appalachians
- We examined the effects of habitat change on Cerulean Warbler ( Dendroica cerulea) populations at stops along Breeding Bird Survey (BBS) routes in the central Appalachians. We used aerial photographs to compare early (1967/1971), middle (1982/1985), and late (2000/2003) periods and compared 1992 and 2001 National Land Cover Data (NLCD). Mean Cerulean Warbler detections per stop...
Authors
Patrick M. McElhone, Petra B. Wood, Deanna K. Dawson
Multi-species occurrence models to evaluate the effects of conservation and management actions Multi-species occurrence models to evaluate the effects of conservation and management actions
Conservation and management actions often have direct and indirect effects on a wide range of species. As such, it is important to evaluate the impacts that such actions may have on both target and non-target species within a region. Understanding how species richness and composition differ as a result of management treatments can help determine potential ecological consequences. Yet it...
Authors
E.F. Zipkin, Royle J. Andrew, D.K. Dawson, S. Bates
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
Science and Products
Filter Total Items: 54
Occupancy in continuous habitat Occupancy in continuous habitat
The probability that a site has at least one individual of a species ('occupancy') has come to be widely used as a state variable for animal population monitoring. The available statistical theory for estimation when detection is imperfect applies particularly to habitat patches or islands, although it is also used for arbitrary plots in continuous habitat. The probability that such a...
Authors
Murray G. Efford, Deanna K. Dawson
Radar analysis of fall bird migration stopover sites in the Northeastern U.S. Radar analysis of fall bird migration stopover sites in the Northeastern U.S.
The national network of weather surveillance radars (WSR-88D/NEXRAD) detects birds in flight, and has proven to be a useful remote-sensing tool for ornithological study. We used data collected during Fall 2008 and 2009 by 16 WSR-88D and 3 terminal Doppler weather radars in the northeastern U.S. (U.S. Fish and Wildlife Service Region 5) to study the spatial distribution of landbirds...
Authors
Jeffrey J. Butler, Deanna K. Dawson
Cerulean Warbler Technical Group: Coordinating international research and conservation Cerulean Warbler Technical Group: Coordinating international research and conservation
Effective conservation for species of concern requires interchange and collaboration among conservationists and stakeholders. The Cerulean Warbler Technical Group (CWTG) is a consortium of biologists and managers from government agencies, non-governmental organizations, academia, and industry, who are dedicated to finding pro-active, science-based solutions for conservation of the...
Authors
D.K. Dawson, T.B. Wigley, P.D. Keyser
Effects of stop-level habitat change on cerulean warbler detections along breeding bird survey routes in the central appalachians Effects of stop-level habitat change on cerulean warbler detections along breeding bird survey routes in the central appalachians
- We examined the effects of habitat change on Cerulean Warbler ( Dendroica cerulea) populations at stops along Breeding Bird Survey (BBS) routes in the central Appalachians. We used aerial photographs to compare early (1967/1971), middle (1982/1985), and late (2000/2003) periods and compared 1992 and 2001 National Land Cover Data (NLCD). Mean Cerulean Warbler detections per stop...
Authors
Patrick M. McElhone, Petra B. Wood, Deanna K. Dawson
Multi-species occurrence models to evaluate the effects of conservation and management actions Multi-species occurrence models to evaluate the effects of conservation and management actions
Conservation and management actions often have direct and indirect effects on a wide range of species. As such, it is important to evaluate the impacts that such actions may have on both target and non-target species within a region. Understanding how species richness and composition differ as a result of management treatments can help determine potential ecological consequences. Yet it...
Authors
E.F. Zipkin, Royle J. Andrew, D.K. Dawson, S. Bates
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