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: 48
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 monitoring bird
Authors
P. McElhone, P.W. Wood, D. Dawson
Characterizing stopover sites of migrating passerine birds in the lower Chesapeake Bay region for conservation: an integrated radar-habitat study
Many conservation organizations and initiatives including Partners-in-Flight and the U.S. Fish and Wildlife Service's regional Joint Ventures have identified migratory songbird stopover habitat as a priority conservation target. However, the spatial and temporal variability inherent in migration presents a number of challenges to both identifying and characterizing stopover habitat. Scarce conse
Authors
S. Mabey, B. Watts, B. Paxton, F. Smith, B. Truitt, D. Dawson
Using radar to advance migratory bird management: 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 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 altering migratory patterns.
Authors
R. Sojda, J. M. Ruth, W.C. Barrow, D.K. Dawson, R.H. Diehl, A. Manville, M.T. Green, D.J. Krueper, S. Johnston
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 current
Authors
P.A. Wood, D.K. Dawson, J.R. Sauer, M.H. Wilson
How we can learn more about the Cerulean Warbler (Dendroica cerulea)
A sense of urgency attends the study of species of concern, like the Cerulean Warbler (Dendroica cerulea). Sharpened by Robbins et al. (1992) and Hamel (1992), such concern prompted the U.S. Department of the Interior, Fish and Wildlife Service (USFWS) to commission a status assessment of the Cerulean Warbler (Hamel 2000a). Shortly after the status review was published, a petition (Ruley 2000) was
Authors
P.B. Hamel, D.K. Dawson, P.D. Keyser
Modeling abundance effects in distance sampling
Distance-sampling methods are commonly used in studies of animal populations to estimate population density. A common objective of such studies is to evaluate the relationship between abundance or density and covariates that describe animal habitat or other environmental influences. However, little attention has been focused on methods of modeling abundance covariate effects in conventional distan
Authors
J. Andrew Royle, D.K. Dawson, S. Bates
DENSITY: software for analysing capture-recapture data from passive detector arrays
A general computer-intensive method is described for fitting spatial detection functions to capture-recapture data from arrays of passive detectors such as live traps and mist nets. The method is used to estimate the population density of 10 species of breeding birds sampled by mist-netting in deciduous forest at Patuxent Research Refuge, Laurel, Maryland, U.S.A., from 1961 to 1972. Total densit
Authors
M.G. Efford, D.K. Dawson, C.S. Robbins
Atlantic Flyway review: Region IV - Fall 2003: Patuxent powerline right-of-way (390-0764)
The station was operated on fewer days than usual in 2003, opening a bit later, closing a week early, and missing several good days in September through mid-October, when the manager/lead bander was conducting research on migrating birds in Lower Delmarva. As a result, capture totals for many species are not comparable to other years, and totals for several species, including House Wren, Northern
Authors
Deanna K. Dawson
Atlantic Flyway review: Piedmont-Coastal Plain, Region IV, Fall 2001
The Hollywood, Butler Island, and Wekiva Basin stations did not operate this year, but we welcome back Jekyll Island, GA, with its flagship species, Western Palm Warbler (835); and we are glad to have a report from Rock Springs Run State Reserve in Florida to replace the Wekiva Station. Except for a couple of good rains in August, the second half of the year was droughty in Maryland and Virginia,
Authors
Chandler S. Robbins
Effects of urbanization on the distribution of area-sensitive forest birds in Prince George's County, Maryland
Bird survey data from Prince George's County, Maryland, were used to evaluate the effects of urbanization on the distribution of forest bird species that are area sensitive. We developed models that predict the probability of occurrence for species during the nesting season as a function of forest area and degree of urbanization. All of the 21 bird species considered occurred in a higher proport
Authors
D.K. Dawson, C.S. Robbins, L.J. Darr
Atlantic Flyway review: Piedmont-Coastal Plain, Region IV, Fall 1999: Patuxent powerline right-of-way (390-0764)
Fall 1999 was among the poorest seasons in this banding station's 20 years of operation. Record high capture totals were set for only two species: Ruby-throated Hummingbird (41 individuals captured, none banded; previous high 21) and White-breasted Nuthatch (two individuals banded; previous high, one). The only other species that stood out as being unusually numerous was Blackpoll Warbler, for whi
Authors
Deanna K. Dawson
Impacts of cowbird parasitism on wood thrushes and other neotropical migrants in suburban Maryland forests
During 1988-1993, we monitored nests of neotropical migrant birds in seven suburban Maryland forests to compare parasitism and predation rates in forests of different areas. Of 1,122 nests monitored, 672 were of Wood Thrush, the most commonly found nesting species. Study sites were forests that ranged in size from 21 ha to more than 1,300 ha in the Piedmont and Coastal Plain regions of Maryland
Authors
B.A. Dowell, J.E. Fallon, C.S. Robbins, D.K. Dawson, F.W. Fallon
Science and Products
Filter Total Items: 48
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 monitoring bird
Authors
P. McElhone, P.W. Wood, D. Dawson
Characterizing stopover sites of migrating passerine birds in the lower Chesapeake Bay region for conservation: an integrated radar-habitat study
Many conservation organizations and initiatives including Partners-in-Flight and the U.S. Fish and Wildlife Service's regional Joint Ventures have identified migratory songbird stopover habitat as a priority conservation target. However, the spatial and temporal variability inherent in migration presents a number of challenges to both identifying and characterizing stopover habitat. Scarce conse
Authors
S. Mabey, B. Watts, B. Paxton, F. Smith, B. Truitt, D. Dawson
Using radar to advance migratory bird management: 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 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 altering migratory patterns.
Authors
R. Sojda, J. M. Ruth, W.C. Barrow, D.K. Dawson, R.H. Diehl, A. Manville, M.T. Green, D.J. Krueper, S. Johnston
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 current
Authors
P.A. Wood, D.K. Dawson, J.R. Sauer, M.H. Wilson
How we can learn more about the Cerulean Warbler (Dendroica cerulea)
A sense of urgency attends the study of species of concern, like the Cerulean Warbler (Dendroica cerulea). Sharpened by Robbins et al. (1992) and Hamel (1992), such concern prompted the U.S. Department of the Interior, Fish and Wildlife Service (USFWS) to commission a status assessment of the Cerulean Warbler (Hamel 2000a). Shortly after the status review was published, a petition (Ruley 2000) was
Authors
P.B. Hamel, D.K. Dawson, P.D. Keyser
Modeling abundance effects in distance sampling
Distance-sampling methods are commonly used in studies of animal populations to estimate population density. A common objective of such studies is to evaluate the relationship between abundance or density and covariates that describe animal habitat or other environmental influences. However, little attention has been focused on methods of modeling abundance covariate effects in conventional distan
Authors
J. Andrew Royle, D.K. Dawson, S. Bates
DENSITY: software for analysing capture-recapture data from passive detector arrays
A general computer-intensive method is described for fitting spatial detection functions to capture-recapture data from arrays of passive detectors such as live traps and mist nets. The method is used to estimate the population density of 10 species of breeding birds sampled by mist-netting in deciduous forest at Patuxent Research Refuge, Laurel, Maryland, U.S.A., from 1961 to 1972. Total densit
Authors
M.G. Efford, D.K. Dawson, C.S. Robbins
Atlantic Flyway review: Region IV - Fall 2003: Patuxent powerline right-of-way (390-0764)
The station was operated on fewer days than usual in 2003, opening a bit later, closing a week early, and missing several good days in September through mid-October, when the manager/lead bander was conducting research on migrating birds in Lower Delmarva. As a result, capture totals for many species are not comparable to other years, and totals for several species, including House Wren, Northern
Authors
Deanna K. Dawson
Atlantic Flyway review: Piedmont-Coastal Plain, Region IV, Fall 2001
The Hollywood, Butler Island, and Wekiva Basin stations did not operate this year, but we welcome back Jekyll Island, GA, with its flagship species, Western Palm Warbler (835); and we are glad to have a report from Rock Springs Run State Reserve in Florida to replace the Wekiva Station. Except for a couple of good rains in August, the second half of the year was droughty in Maryland and Virginia,
Authors
Chandler S. Robbins
Effects of urbanization on the distribution of area-sensitive forest birds in Prince George's County, Maryland
Bird survey data from Prince George's County, Maryland, were used to evaluate the effects of urbanization on the distribution of forest bird species that are area sensitive. We developed models that predict the probability of occurrence for species during the nesting season as a function of forest area and degree of urbanization. All of the 21 bird species considered occurred in a higher proport
Authors
D.K. Dawson, C.S. Robbins, L.J. Darr
Atlantic Flyway review: Piedmont-Coastal Plain, Region IV, Fall 1999: Patuxent powerline right-of-way (390-0764)
Fall 1999 was among the poorest seasons in this banding station's 20 years of operation. Record high capture totals were set for only two species: Ruby-throated Hummingbird (41 individuals captured, none banded; previous high 21) and White-breasted Nuthatch (two individuals banded; previous high, one). The only other species that stood out as being unusually numerous was Blackpoll Warbler, for whi
Authors
Deanna K. Dawson
Impacts of cowbird parasitism on wood thrushes and other neotropical migrants in suburban Maryland forests
During 1988-1993, we monitored nests of neotropical migrant birds in seven suburban Maryland forests to compare parasitism and predation rates in forests of different areas. Of 1,122 nests monitored, 672 were of Wood Thrush, the most commonly found nesting species. Study sites were forests that ranged in size from 21 ha to more than 1,300 ha in the Piedmont and Coastal Plain regions of Maryland
Authors
B.A. Dowell, J.E. Fallon, C.S. Robbins, D.K. Dawson, F.W. Fallon