Douglas Johnson
Douglas Johnson is a Research Statistician (Emeritus) for the USGS Northern Prairie Wildlife Research Center in Jamestown, North Dakota.
Science and Products
Filter Total Items: 311
The role of hypothesis testing in wildlife science
No abstract available.
Authors
Douglas H. Johnson
Effects of management practices on wetland birds: Eared Grebe
Information on the habitat requirements and effects of habitat management on wetland birds were summarized from information in more than 500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although the BBS may not capture the presence of elusive waterbird species, the BBS is a st
Authors
Jill A. Dechant, Douglas H. Johnson, Christopher M. Goldade, James O. Church, Betty R. Euliss
Effects of management practices on wetland birds: Marsh Wren
Information on the habitat requirements and effects of habitat management on wetland birds were summarized from information in more than 500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although the BBS may not capture the presence of elusive waterbird species, the BBS is a st
Authors
Amy L. Zimmerman, Jill A. Dechant, Douglas H. Johnson, Christopher M. Goldade, James O. Church, Betty R. Euliss
Effects of management practices on wetland birds: Sora
Information on the habitat requirements and effects of habitat management on wetland birds were summarized from information in more than 500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although the BBS may not capture the presence of elusive waterbird species, the BBS is a st
Authors
Amy L. Zimmerman, Brent E. Jamison, Jill A. Dechant, Douglas H. Johnson, Christopher M. Goldade, James O. Church, Betty R. Euliss
Monitoring black-tailed prairie dog colonies with high-resolution satellite imagery
The United States Fish and Wildlife Service has determined that the black-tailed prairie dog (Cynomys ludovicianus) warrants listing as a threatened species under the Endangered Species Act. Central to any conservation planning for the black-tailed prairie dog is an appropriate detection and monitoring technique. Because coarse-resolution satellite imagery is not adequate to detect black-tailed p
Authors
John G. Sidle, D. H. Johnson, B.R. Euliss, M. Tooze
Grassland bird communities and environmental health: The role of landscape features
Ecosystems throughout the world are imperiled by myriad anthropogenic factors. It is critical to develop tools for evaluating and monitoring the health or integrity of various ecosystems. Because of the broad scale of the problem, the urgency to address informational needs, and the limited financial resources committed to the problem, relatively inexpensive tools that encompass large areas are esp
Authors
Douglas H. Johnson, S.F. Browder, Maiken Winter
Effects of management practices on grassland birds: Nelson's Sharp-tailed Sparrow
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated, the maps a
Authors
Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Paul A. Rabie, Betty R. Euliss
The importance of replication in wildlife research
Wildlife ecology and management studies have been widely criticized for deficiencies in design or analysis. Manipulative experiments--with controls, randomization, and replication in space and time--provide powerful ways of learning about natural systems and establishing causal relationships, but such studies are rare in our field. Observational studies and sample surveys are more common; they als
Authors
D. H. Johnson
Assemblages of breeding birds as indicators of grassland condition
We developed a measure of biological integrity for grasslands (GI) based on the most influential habitat types in the Prairie Pothole Region of North Dakota. GI is based on proportions of habitat types and the relationships of these habitat types to breeding birds. Habitat types were identified by digital aerial photography, verified on the ground, and quantified using GIS. We then developed an in
Authors
S.F. Browder, D. H. Johnson, I. J. Ball
Discussion comments on 'Evaluation of some random effects methodology applicable to bird ringing data' by Burnham and White
No abstract available.
Authors
Douglas H. Johnson
Evaluation of management practices in wetland meadows at Grays Lake National Wildlife Refuge, Idaho, 1997-2000
We assessed the relative values of 4 management practices (idle, late season grazing, fall prescribed burning, and rotation of idle and summer grazing) to biotic resources of the grassland-wetland meadow ecosystem at Grays Lake during 1997-2000. Three replicates of each treatment were randomly assigned to 12 experimental units that bordered the deep emergent marsh. Biotic factors examined include
Authors
J. E. Austin, W.H. Pyle, J.R. Keough, D. H. Johnson
Toward better atlases: improving presence-absence information
No abstract available.
Authors
D. H. Johnson, G.A. Sargeant
Science and Products
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Filter Total Items: 311
The role of hypothesis testing in wildlife science
No abstract available.AuthorsDouglas H. JohnsonEffects of management practices on wetland birds: Eared Grebe
Information on the habitat requirements and effects of habitat management on wetland birds were summarized from information in more than 500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although the BBS may not capture the presence of elusive waterbird species, the BBS is a stAuthorsJill A. Dechant, Douglas H. Johnson, Christopher M. Goldade, James O. Church, Betty R. EulissEffects of management practices on wetland birds: Marsh Wren
Information on the habitat requirements and effects of habitat management on wetland birds were summarized from information in more than 500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although the BBS may not capture the presence of elusive waterbird species, the BBS is a stAuthorsAmy L. Zimmerman, Jill A. Dechant, Douglas H. Johnson, Christopher M. Goldade, James O. Church, Betty R. EulissEffects of management practices on wetland birds: Sora
Information on the habitat requirements and effects of habitat management on wetland birds were summarized from information in more than 500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although the BBS may not capture the presence of elusive waterbird species, the BBS is a stAuthorsAmy L. Zimmerman, Brent E. Jamison, Jill A. Dechant, Douglas H. Johnson, Christopher M. Goldade, James O. Church, Betty R. EulissMonitoring black-tailed prairie dog colonies with high-resolution satellite imagery
The United States Fish and Wildlife Service has determined that the black-tailed prairie dog (Cynomys ludovicianus) warrants listing as a threatened species under the Endangered Species Act. Central to any conservation planning for the black-tailed prairie dog is an appropriate detection and monitoring technique. Because coarse-resolution satellite imagery is not adequate to detect black-tailed pAuthorsJohn G. Sidle, D. H. Johnson, B.R. Euliss, M. ToozeGrassland bird communities and environmental health: The role of landscape features
Ecosystems throughout the world are imperiled by myriad anthropogenic factors. It is critical to develop tools for evaluating and monitoring the health or integrity of various ecosystems. Because of the broad scale of the problem, the urgency to address informational needs, and the limited financial resources committed to the problem, relatively inexpensive tools that encompass large areas are espAuthorsDouglas H. Johnson, S.F. Browder, Maiken WinterEffects of management practices on grassland birds: Nelson's Sharp-tailed Sparrow
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 5,500 published and unpublished papers. A range map is provided to indicate the relative densities of the species in North America, based on Breeding Bird Survey (BBS) data. Although birds frequently are observed outside the breeding range indicated, the maps aAuthorsJill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Paul A. Rabie, Betty R. EulissThe importance of replication in wildlife research
Wildlife ecology and management studies have been widely criticized for deficiencies in design or analysis. Manipulative experiments--with controls, randomization, and replication in space and time--provide powerful ways of learning about natural systems and establishing causal relationships, but such studies are rare in our field. Observational studies and sample surveys are more common; they alsAuthorsD. H. JohnsonAssemblages of breeding birds as indicators of grassland condition
We developed a measure of biological integrity for grasslands (GI) based on the most influential habitat types in the Prairie Pothole Region of North Dakota. GI is based on proportions of habitat types and the relationships of these habitat types to breeding birds. Habitat types were identified by digital aerial photography, verified on the ground, and quantified using GIS. We then developed an inAuthorsS.F. Browder, D. H. Johnson, I. J. BallDiscussion comments on 'Evaluation of some random effects methodology applicable to bird ringing data' by Burnham and White
No abstract available.AuthorsDouglas H. JohnsonEvaluation of management practices in wetland meadows at Grays Lake National Wildlife Refuge, Idaho, 1997-2000
We assessed the relative values of 4 management practices (idle, late season grazing, fall prescribed burning, and rotation of idle and summer grazing) to biotic resources of the grassland-wetland meadow ecosystem at Grays Lake during 1997-2000. Three replicates of each treatment were randomly assigned to 12 experimental units that bordered the deep emergent marsh. Biotic factors examined includeAuthorsJ. E. Austin, W.H. Pyle, J.R. Keough, D. H. JohnsonToward better atlases: improving presence-absence information
No abstract available.AuthorsD. H. Johnson, G.A. Sargeant