David Andersen, PhD (Former Employee)
Science and Products
Filter Total Items: 64
Do singing-ground surveys reflect american woodcock abundance in the western Great Lakes region? Do singing-ground surveys reflect american woodcock abundance in the western Great Lakes region?
The Singing-ground Survey (SGS) is the primary monitoring tool used to assess population status and trends of American woodcock (Scolopax minor). Like most broad-scale surveys, the SGS cannot be directly validated because there are no independent estimates of abundance of displaying male American woodcock at an appropriate spatial scale. Furthermore, because locations of individual SGS...
Authors
Matthew R. Nelson, David E. Andersen
Effects of brood parasitism by brown-headed cowbirds may persist in the post fledging period Effects of brood parasitism by brown-headed cowbirds may persist in the post fledging period
Brood parasitism by Brown-headed Cowbirds (Molothrus ater) typically decreases the number of host juveniles that fledge: however, little information exists regarding the effect of cowbird parasitism during the post-fledging period. We monitored 115 Ovenbird (Seiurus aurocapilla) nests in 2006–2008 in northcentral Minnesota, six of which were parasitized. We used radiotelemetry to monitor...
Authors
Sean M. Peterson, Henry M. Streby, David E. Andersen
Spot-mapping underestimates song-territory size and use of mature forest by breeding golden-winged warblers in Minnesota, USA Spot-mapping underestimates song-territory size and use of mature forest by breeding golden-winged warblers in Minnesota, USA
Studies of songbird breeding habitat often compare habitat characteristics of used and unused areas. Although there is usually meticulous effort to precisely and consistently measure habitat characteristics, accuracy of methods for estimating which areas are used versus which are unused by birds remains generally untested. To examine accuracy of spot-mapping to identify singing...
Authors
Henry M. Streby, John P. Loegering, David E. Andersen
Northern goshawk monitoring in the western Great Lakes bioregion Northern goshawk monitoring in the western Great Lakes bioregion
Uncertainties about factors affecting Northern Goshawk (Accipiter gentilis) ecology and the status of populations have added to the challenge of managing this species. To address data needs for determining the status of goshawk populations, Hargis and Woodbridge (2006) developed a bioregional monitoring protocol based on estimating occupancy. The goal of our study was to implement this...
Authors
Jason E. Bruggeman, David E. Andersen, James E. Woodford
Use of early-successional managed northern forest by mature-forest species during the post-fledging period Use of early-successional managed northern forest by mature-forest species during the post-fledging period
In eastern North America, after the young fledge, both adult and juvenile mature-forest birds may use regenerating clearcuts, although which species frequent early-successional forest and during which life stages is not well documented. To assess whether birds nesting in mature forest in north-central Minnesota use regenerating clearcuts 2–10 years old, we netted after birds fledged...
Authors
Henry M. Streby, Sean M. Peterson, Tara L. McAllister, David E. Andersen
Invertebrate availability and vegetation characteristics explain use of nonnesting cover types by mature-forest songbirds during the postfledging period Invertebrate availability and vegetation characteristics explain use of nonnesting cover types by mature-forest songbirds during the postfledging period
Some species of mature‐forest‐nesting songbirds use regenerating clearcuts and forested wetlands during the postfledging period (between nesting and migration). Relatively dense vegetation structure and abundant food resources in non‐mature‐forest cover types have been hypothesized to explain this phenomenon. We examined the relative importance of vegetation structure and invertebrate...
Authors
Henry M. Streby, Sean M. Peterson, David E. Andersen
Science and Products
Filter Total Items: 64
Do singing-ground surveys reflect american woodcock abundance in the western Great Lakes region? Do singing-ground surveys reflect american woodcock abundance in the western Great Lakes region?
The Singing-ground Survey (SGS) is the primary monitoring tool used to assess population status and trends of American woodcock (Scolopax minor). Like most broad-scale surveys, the SGS cannot be directly validated because there are no independent estimates of abundance of displaying male American woodcock at an appropriate spatial scale. Furthermore, because locations of individual SGS...
Authors
Matthew R. Nelson, David E. Andersen
Effects of brood parasitism by brown-headed cowbirds may persist in the post fledging period Effects of brood parasitism by brown-headed cowbirds may persist in the post fledging period
Brood parasitism by Brown-headed Cowbirds (Molothrus ater) typically decreases the number of host juveniles that fledge: however, little information exists regarding the effect of cowbird parasitism during the post-fledging period. We monitored 115 Ovenbird (Seiurus aurocapilla) nests in 2006–2008 in northcentral Minnesota, six of which were parasitized. We used radiotelemetry to monitor...
Authors
Sean M. Peterson, Henry M. Streby, David E. Andersen
Spot-mapping underestimates song-territory size and use of mature forest by breeding golden-winged warblers in Minnesota, USA Spot-mapping underestimates song-territory size and use of mature forest by breeding golden-winged warblers in Minnesota, USA
Studies of songbird breeding habitat often compare habitat characteristics of used and unused areas. Although there is usually meticulous effort to precisely and consistently measure habitat characteristics, accuracy of methods for estimating which areas are used versus which are unused by birds remains generally untested. To examine accuracy of spot-mapping to identify singing...
Authors
Henry M. Streby, John P. Loegering, David E. Andersen
Northern goshawk monitoring in the western Great Lakes bioregion Northern goshawk monitoring in the western Great Lakes bioregion
Uncertainties about factors affecting Northern Goshawk (Accipiter gentilis) ecology and the status of populations have added to the challenge of managing this species. To address data needs for determining the status of goshawk populations, Hargis and Woodbridge (2006) developed a bioregional monitoring protocol based on estimating occupancy. The goal of our study was to implement this...
Authors
Jason E. Bruggeman, David E. Andersen, James E. Woodford
Use of early-successional managed northern forest by mature-forest species during the post-fledging period Use of early-successional managed northern forest by mature-forest species during the post-fledging period
In eastern North America, after the young fledge, both adult and juvenile mature-forest birds may use regenerating clearcuts, although which species frequent early-successional forest and during which life stages is not well documented. To assess whether birds nesting in mature forest in north-central Minnesota use regenerating clearcuts 2–10 years old, we netted after birds fledged...
Authors
Henry M. Streby, Sean M. Peterson, Tara L. McAllister, David E. Andersen
Invertebrate availability and vegetation characteristics explain use of nonnesting cover types by mature-forest songbirds during the postfledging period Invertebrate availability and vegetation characteristics explain use of nonnesting cover types by mature-forest songbirds during the postfledging period
Some species of mature‐forest‐nesting songbirds use regenerating clearcuts and forested wetlands during the postfledging period (between nesting and migration). Relatively dense vegetation structure and abundant food resources in non‐mature‐forest cover types have been hypothesized to explain this phenomenon. We examined the relative importance of vegetation structure and invertebrate...
Authors
Henry M. Streby, Sean M. Peterson, David E. Andersen