Abby Powell, PhD (Former Employee)
Science and Products
Filter Total Items: 52
Nest-site selection and nest success of an Arctic-breeding passerine, Smith's Longspur, in a changing climate Nest-site selection and nest success of an Arctic-breeding passerine, Smith's Longspur, in a changing climate
Despite changes in shrub cover and weather patterns associated with climate change in the Arctic, little is known about the breeding requirements of most passerines tied to northern regions. We investigated the nesting biology and nest habitat characteristics of Smith's Longspurs (Calcarius pictus) in 2 study areas in the Brooks Range of Alaska, USA. First, we examined variation in...
Authors
Heather R. McFarland, Steve J. Kendall, Abby Powell
Nesting ecology of Whimbrels in boreal Alaska Nesting ecology of Whimbrels in boreal Alaska
Breeding ecology studies of boreal waders have been relatively scarce in North America. This paucity is due in part to boreal habitats being difficult to access, and boreal waders being widely dispersed and thus difficult to monitor. Between 2008 and 2014 we studied the nesting ecology of Whimbrels Numenius phaeopus hudsonicus in interior Alaska, a region characterized by an active...
Authors
Christopher M. Harwood, Robert E. Gill, Abby Powell
Biochemical and clinical responses of Common Eiders to implanted satellite transmitters Biochemical and clinical responses of Common Eiders to implanted satellite transmitters
Implanted biologging devices, such as satellite-linked platform transmitter terminals (PTTs), have been used widely to delineate populations and identify movement patterns of sea ducks. Although in some cases these ecological studies could reveal transmitter effects on behavior and mortality, experiments conducted under controlled conditions can provide valuable information to understand...
Authors
Christopher J. Latty, Tuula E. Hollmen, Margaret R. Petersen, Abby Powell, Russel D. Andrews
Natural disturbance shapes benthic intertidal macroinvertebrate communities of high latitude river deltas Natural disturbance shapes benthic intertidal macroinvertebrate communities of high latitude river deltas
Unlike lower latitude coastlines, the estuarine nearshore zones of the Alaskan Beaufort Sea are icebound and frozen up to 9 months annually. This annual freezing event represents a dramatic physical disturbance to fauna living within intertidal sediments. The main objectives of this study were to describe the benthic communities of Beaufort Sea deltas, including temporal changes and...
Authors
Roy T. Churchwell, Steve J. Kendall, Amy L. Blanchard, Kenneth H. Dunton, Abby N. Powell
Shifts in the distribution of molting Spectacled Eiders (Somateria fischeri) indicate ecosystem change in the Arctic Shifts in the distribution of molting Spectacled Eiders (Somateria fischeri) indicate ecosystem change in the Arctic
Shifts in the distribution of benthivorous predators provide an indication of underlying environmental changes in benthic-mediated ecosystems. Spectacled Eiders (Somateria fischeri) are benthivorous sea ducks that spend the nonbreeding portion of their annual cycle in the Bering, Chukchi, Beaufort, and East Siberian seas. Sea ducks generally molt in biologically productive areas with...
Authors
Matthew G. Sexson, Margaret R. Petersen, Greg A. Breed, Abby N. Powell
Limits to benthic feeding by eiders in a vital Arctic migration corridor due to localized prey and changing sea ice Limits to benthic feeding by eiders in a vital Arctic migration corridor due to localized prey and changing sea ice
Four species of threatened or declining eider ducks that nest in the Arctic migrate through the northeast Chukchi Sea, where anticipated industrial development may require prioritizing areas for conservation. In this nearshore corridor (10–40 m depth), the eiders’ access to benthic prey during the spring is restricted to variable areas of open water within sea ice. For the most abundant...
Authors
James R. Lovvorn, Aariel R. Rocha, Stephen C. Jewett, Douglas Dasher, Steffen Oppel, Abby Powell
Science and Products
Filter Total Items: 52
Nest-site selection and nest success of an Arctic-breeding passerine, Smith's Longspur, in a changing climate Nest-site selection and nest success of an Arctic-breeding passerine, Smith's Longspur, in a changing climate
Despite changes in shrub cover and weather patterns associated with climate change in the Arctic, little is known about the breeding requirements of most passerines tied to northern regions. We investigated the nesting biology and nest habitat characteristics of Smith's Longspurs (Calcarius pictus) in 2 study areas in the Brooks Range of Alaska, USA. First, we examined variation in...
Authors
Heather R. McFarland, Steve J. Kendall, Abby Powell
Nesting ecology of Whimbrels in boreal Alaska Nesting ecology of Whimbrels in boreal Alaska
Breeding ecology studies of boreal waders have been relatively scarce in North America. This paucity is due in part to boreal habitats being difficult to access, and boreal waders being widely dispersed and thus difficult to monitor. Between 2008 and 2014 we studied the nesting ecology of Whimbrels Numenius phaeopus hudsonicus in interior Alaska, a region characterized by an active...
Authors
Christopher M. Harwood, Robert E. Gill, Abby Powell
Biochemical and clinical responses of Common Eiders to implanted satellite transmitters Biochemical and clinical responses of Common Eiders to implanted satellite transmitters
Implanted biologging devices, such as satellite-linked platform transmitter terminals (PTTs), have been used widely to delineate populations and identify movement patterns of sea ducks. Although in some cases these ecological studies could reveal transmitter effects on behavior and mortality, experiments conducted under controlled conditions can provide valuable information to understand...
Authors
Christopher J. Latty, Tuula E. Hollmen, Margaret R. Petersen, Abby Powell, Russel D. Andrews
Natural disturbance shapes benthic intertidal macroinvertebrate communities of high latitude river deltas Natural disturbance shapes benthic intertidal macroinvertebrate communities of high latitude river deltas
Unlike lower latitude coastlines, the estuarine nearshore zones of the Alaskan Beaufort Sea are icebound and frozen up to 9 months annually. This annual freezing event represents a dramatic physical disturbance to fauna living within intertidal sediments. The main objectives of this study were to describe the benthic communities of Beaufort Sea deltas, including temporal changes and...
Authors
Roy T. Churchwell, Steve J. Kendall, Amy L. Blanchard, Kenneth H. Dunton, Abby N. Powell
Shifts in the distribution of molting Spectacled Eiders (Somateria fischeri) indicate ecosystem change in the Arctic Shifts in the distribution of molting Spectacled Eiders (Somateria fischeri) indicate ecosystem change in the Arctic
Shifts in the distribution of benthivorous predators provide an indication of underlying environmental changes in benthic-mediated ecosystems. Spectacled Eiders (Somateria fischeri) are benthivorous sea ducks that spend the nonbreeding portion of their annual cycle in the Bering, Chukchi, Beaufort, and East Siberian seas. Sea ducks generally molt in biologically productive areas with...
Authors
Matthew G. Sexson, Margaret R. Petersen, Greg A. Breed, Abby N. Powell
Limits to benthic feeding by eiders in a vital Arctic migration corridor due to localized prey and changing sea ice Limits to benthic feeding by eiders in a vital Arctic migration corridor due to localized prey and changing sea ice
Four species of threatened or declining eider ducks that nest in the Arctic migrate through the northeast Chukchi Sea, where anticipated industrial development may require prioritizing areas for conservation. In this nearshore corridor (10–40 m depth), the eiders’ access to benthic prey during the spring is restricted to variable areas of open water within sea ice. For the most abundant...
Authors
James R. Lovvorn, Aariel R. Rocha, Stephen C. Jewett, Douglas Dasher, Steffen Oppel, Abby Powell