Daniel Twedt, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 93
Development of management objectives for breeding birds in the Mississippi Alluvial Valley Development of management objectives for breeding birds in the Mississippi Alluvial Valley
We used a six-step process to set habitat objectives and population goals for breeding birds in the Mississippi Alluvial Valley. Specifically, we used existing empirical studies and mathematically derived viable population estimates to define habitat objectives and population goals for bottomland hardwood forest, the most important habitat type in this physiographic area. Although...
Authors
A.J. Mueller, D.J. Twedt, C.R. Loesch
An evaluation strategy for conservation goals of the Mississippi Alluvial Valley An evaluation strategy for conservation goals of the Mississippi Alluvial Valley
The population goals and habitat objectives established by the Mississippi Alluvial Valley Migratory Bird Initiative are based on several unverified assumptions. We have developed an evaluation strategy that identifies research needed to verify these assumptions. We also have outlined a monitoring strategy designed to track progress toward achieving habitat objectives and population...
Authors
D.J. Twedt, P.B. Hamel, R.J. Cooper, M.S. Woodrey
Conservation planning and monitoring avian habitat Conservation planning and monitoring avian habitat
Migratory bird conservation plans should not only develop population goals, they also should establish attainable objectives for optimizing avian habitats. Meeting population goals is of paramount importance, but progress toward established habitat objectives can generally be monitored more easily than can progress toward population goals. Additionally, local or regional habitat...
Authors
D.J. Twedt, C.R. Loesch
Temporal differences in point counts of bottomland forest landbirds Temporal differences in point counts of bottomland forest landbirds
We compared number of avian species and individuals in morning and evening point counts during the breeding season and during winter in a bottomland hardwood forest in west-central Mississippi. USA. In both seasons, more species and individuals were recorded during morning counts than during evening counts. We also compared morning and evening detections for 18 species during the...
Authors
W.P. Smith, D.J. Twedt
Impact of forest type and management strategy on avian densities in the Mississippi Alluvial Valley, USA Impact of forest type and management strategy on avian densities in the Mississippi Alluvial Valley, USA
Avian territory densities were determined from 20 Breeding Bird Censuses in mature (>30 years) bottomland hardwood stand: and 18 Breeding Bird Censuses in young (6-9 years old) cottonwood (Populas deltoides) plantations in the Mississippi Alluvial Valley. Avian species richness, diversity, and territory density were greater (p 0.01) in bottomland hardwood stands than in intensively...
Authors
D.J. Twedt, R.R. Wilson, J. L. Henne-Kerr, R.B. Hamilton
Waterfowl density on agricultural fields managed to retain water in winter Waterfowl density on agricultural fields managed to retain water in winter
Managed water on private and public land provides habitat for wintering waterfowl in the Mississippi Valley, where flood control projects have reduced the area of natural flooding. We compared waterfowl densities on rice, soybean, and moist-soil fields under cooperative agreements to retain water from 1 November through 28 February in Arkansas and Mississippi and assessed temporal...
Authors
D.J. Twedt, C.O. Nelms
Science and Products
Filter Total Items: 93
Development of management objectives for breeding birds in the Mississippi Alluvial Valley Development of management objectives for breeding birds in the Mississippi Alluvial Valley
We used a six-step process to set habitat objectives and population goals for breeding birds in the Mississippi Alluvial Valley. Specifically, we used existing empirical studies and mathematically derived viable population estimates to define habitat objectives and population goals for bottomland hardwood forest, the most important habitat type in this physiographic area. Although...
Authors
A.J. Mueller, D.J. Twedt, C.R. Loesch
An evaluation strategy for conservation goals of the Mississippi Alluvial Valley An evaluation strategy for conservation goals of the Mississippi Alluvial Valley
The population goals and habitat objectives established by the Mississippi Alluvial Valley Migratory Bird Initiative are based on several unverified assumptions. We have developed an evaluation strategy that identifies research needed to verify these assumptions. We also have outlined a monitoring strategy designed to track progress toward achieving habitat objectives and population...
Authors
D.J. Twedt, P.B. Hamel, R.J. Cooper, M.S. Woodrey
Conservation planning and monitoring avian habitat Conservation planning and monitoring avian habitat
Migratory bird conservation plans should not only develop population goals, they also should establish attainable objectives for optimizing avian habitats. Meeting population goals is of paramount importance, but progress toward established habitat objectives can generally be monitored more easily than can progress toward population goals. Additionally, local or regional habitat...
Authors
D.J. Twedt, C.R. Loesch
Temporal differences in point counts of bottomland forest landbirds Temporal differences in point counts of bottomland forest landbirds
We compared number of avian species and individuals in morning and evening point counts during the breeding season and during winter in a bottomland hardwood forest in west-central Mississippi. USA. In both seasons, more species and individuals were recorded during morning counts than during evening counts. We also compared morning and evening detections for 18 species during the...
Authors
W.P. Smith, D.J. Twedt
Impact of forest type and management strategy on avian densities in the Mississippi Alluvial Valley, USA Impact of forest type and management strategy on avian densities in the Mississippi Alluvial Valley, USA
Avian territory densities were determined from 20 Breeding Bird Censuses in mature (>30 years) bottomland hardwood stand: and 18 Breeding Bird Censuses in young (6-9 years old) cottonwood (Populas deltoides) plantations in the Mississippi Alluvial Valley. Avian species richness, diversity, and territory density were greater (p 0.01) in bottomland hardwood stands than in intensively...
Authors
D.J. Twedt, R.R. Wilson, J. L. Henne-Kerr, R.B. Hamilton
Waterfowl density on agricultural fields managed to retain water in winter Waterfowl density on agricultural fields managed to retain water in winter
Managed water on private and public land provides habitat for wintering waterfowl in the Mississippi Valley, where flood control projects have reduced the area of natural flooding. We compared waterfowl densities on rice, soybean, and moist-soil fields under cooperative agreements to retain water from 1 November through 28 February in Arkansas and Mississippi and assessed temporal...
Authors
D.J. Twedt, C.O. Nelms