Cory Overton (Former Employee)
Science and Products
Filter Total Items: 22
No Result Found
Filter Total Items: 58
Using high resolution satellite and telemetry data to track flooded habitats, their use by waterfowl, and evaluate effects of drought on waterfowl and shorebird bioenergetics in California Using high resolution satellite and telemetry data to track flooded habitats, their use by waterfowl, and evaluate effects of drought on waterfowl and shorebird bioenergetics in California
Wetland managers in the Central Valley of California, a dynamic hydrological landscape, require information regarding the amount and location of existing wetland habitat to make decisions on how to best use water resources to support multiple wildlife objectives, particularly during drought. Scientists from the U.S. Geological Survey Western Ecological Research Center (WERC), Point Blue
Authors
Elliott Matchett, Matthew Reiter, Cory T. Overton, Dennis Jongsomjit, Michael L. Casazza
Waterfowl use of wetland habitats informs wetland restoration designs for multi‐species benefits Waterfowl use of wetland habitats informs wetland restoration designs for multi‐species benefits
Extensive global estuarine wetland losses have prompted intensive focus on restoration of these habitats. In California, substantial tracts of freshwater, brackish and tidal wetlands have been lost. Given the anthropogenic footprint of development and urbanization in this region, wetland restoration must rely on conversion of existing habitat types rather than adding new wetlands. These
Authors
Michael L. Casazza, Fiona McDuie, Scott Jones, Austen Lorenz, Cory T. Overton, Julie L. Yee, Cliff L. Feldheim, Joshua T. Ackerman, Karen M. Thorne
Ecological insights from three decades of animal movement tracking across a changing Arctic Ecological insights from three decades of animal movement tracking across a changing Arctic
The Arctic is entering a new ecological state, with alarming consequences for humanity. Animal-borne sensors offer a window into these changes. Although substantial animal tracking data from the Arctic and subarctic exist, most are difficult to discover and access. Here, we present the new Arctic Animal Movement Archive (AAMA), a growing collection of more than 200 standardized...
Authors
Sarah C Davidson, Gil Bohrer, Eliezer Gurarie, Scott LaPoint, Peter J Mahoney, Natalie Boelman, Jan UH Eitel, Laura R. Prugh, Lee A. Vierling, Jyoti Jennewein, Emma Grier, Ophelie Couriot, Allicia P Kelly, Arjan JH Meddens, Ruth Y Oliver, Roland Kays, Martin Wikelski, Tomas Aarvak, Joshua T. Ackerman, Monica Almeida e Silva, José A. Alves, Erin Bayne, Bryan Bedrosian, Jerrold L. Belant, Andrew M Berdahl, Alicia Berlin, Dominique Berteaux, Joel Bety, Dmitrij Boiko, Travis L. Booms, Bridget L Borg, Stan Boutin, W. Sean Boyd, Kane Brides, Stephen C. Brown, Victor N. Bulyuk, Kurt K Burnham, David Cabot, Michael L. Casazza, Katherine S. Christie, Erica H. Craig, Shanti E. Davis, Tracy Davison, Dominic Demma, Christopher R. DeSorbo, Andrew E. Dixon, Robert Domenech, Gotz Eichhorn, Kyle Elliott, Joseph R. Evenson, Klaus-Michael Exo, Steven Ferguson, Wolfgang Fiedler, Aaron T. Fisk, J. Fort, Alastair Franke, Mark R. Fuller, Stefan Garthe, Gilles Gauthier, Grant Gilchrist, Petr Glazov, Carrie E. Gray, David Gremillet, Larry Griffin, Mike Hallworth, Autumn-Lynn Harrison, Holly Hennin, J Mark Hipfner, James Hodson, James A. Johnson, Kyle Joly, Kimberly Jones, Todd E. Katzner, Jeff W Kidd, Elly Knight, Michael N. Kochert, Andrea Kolzsch, Helmut Kruckenberg, Benjamin J Lagassé, Sandra Lai, Jean-François Lamarre, Richard B. Lanctot, Nicholas C Larter, A David Latham, Christopher J. Latty, James P. Lawler, Don-Jean Leandri-Breton, Hansoo Lee, Stephen B. Lewis, Oliver P. Love, Jesper Madsen, Mark Maftei, Mark L. Mallory, Buck Mangipane, Mikhail Y. Markovets, Peter P. Marra, Rebecca L McGuire, Carol McIntyre, Emily A McKinnon, Tricia A. Miller, Sander Moonen, Tong Mu, Gerhard JDM Muskens, Janet Ng, Kerry L Nicholson, Ingar Jostein Oien, Cory T. Overton, Patricia A Owen, Allison G. L. Patterson, Aevar Petersen, Ivan Pokrovsky, Luke L. Powell, Rui Prieto, Petra Quillfeldt, Jennie Rausch, Kelsey Russell, Sarah T. Saalfeld, Hans Schekkerman, Joel A. Schmutz, Philipp Schwemmer, Dale R. Seip, Adam Shreading, Mónica A. Silva, Brian W. Smith, Fletcher Smith, Jeff P. Smith, Katherine RS Snell, Aleksandr Sokolov, Vasiliy Sokolov, Diana V Solovyeva, Mathew S Sorum, Grigori Tertitski, J. F. Therrien, Kasper Thorup, T. Lee Tibbitts, Ingrid Tulp, Brian D. Uher-Koch, Rob van Bemmelen, Steve Van Wilgenburg, Andrew L. Von Duyke, Jesse Watson, Bryan D Watts, Judy A Williams, Matthew Wilson, Jay Wright, Michael A Yates, David Yurkowski, Ramūnas Žydelis, Mark Hebblewhite
Gambel’s quail survey variability and implications for survey design in the Mohave Desert Gambel’s quail survey variability and implications for survey design in the Mohave Desert
Careful design of a wildlife population monitoring strategy is necessary to obtain accurate and precise results whether the purpose of the survey is development of habitat suitability models, to estimate abundance, or assess site occupancy. Important characteristics to consider in survey design are sources of elevated variability, particularly within‐subject variability, which increases...
Authors
Cory T. Overton, Michael L. Casazza, Daniel Connelley, Scott C. Gardner
Good prospects: High-resolution telemetry data suggests novel brood-site selection behavior in waterfowl Good prospects: High-resolution telemetry data suggests novel brood-site selection behavior in waterfowl
Breeding success should increase with prior knowledge of the surrounding environment, which is dependent upon an animal’s ability to evaluate habitat. Prospecting for nesting locations and migratory stop-over sites are well-established behaviors among bird species. We assessed whether ducks in Suisun Marsh, California, USA, a brackish marsh, prospect for suitable wetlands in the week...
Authors
Michael L. Casazza, Fiona McDuie, Austen Lorenz, David A. Keiter, Julie L. Yee, Cory T. Overton, Sarah H. Peterson, Cliff L. Feldheim, Joshua T. Ackerman
Moving at the speed of flight: Dabbling duck-movement rates and the relationship with electronic tracking interval Moving at the speed of flight: Dabbling duck-movement rates and the relationship with electronic tracking interval
Context. Effective wildlife management requires information on habitat and resource needs, which can be estimated with movement information and modelling energetics. One necessary component of avian models is flight speeds at multiple temporal scales. Technology has limited the ability to accurately assess flight speeds, leading to estimates of questionable accuracy, many of which have...
Authors
Fiona McDuie, Michael L. Casazza, David A. Keiter, Cory T. Overton, Mark P. Herzog, Cliff L. Feldheim, Joshua T. Ackerman
GPS tracking data reveals daily spatio-temporal movement patterns of waterfowl GPS tracking data reveals daily spatio-temporal movement patterns of waterfowl
Background Spatio-temporal patterns of movement can characterize relationships between organisms and their surroundings, and address gaps in our understanding of species ecology, activity budgets, bioenergetics, and habitat resource management. Highly mobile waterfowl, which can exploit resources over large spatial extents, are excellent models to understand relationships between...
Authors
Fiona McDuie, Michael L. Casazza, Cory T. Overton, Mark P. Herzog, C. Alex Hartman, Sarah H. Peterson, Cliff L. Feldheim, Joshua T. Ackerman
Rising tides: Assessing habitat vulnerability for an endangered salt marsh-dependent species with sea-level rise Rising tides: Assessing habitat vulnerability for an endangered salt marsh-dependent species with sea-level rise
Salt marsh-dependent species are vulnerable to impacts of sea-level rise (SLR). Site-specific differences in ecogeomorphic processes result in different SLR vulnerabilities. SLR impacts to Ridgway’s rail (Rallus obsoletus) of Southern California (SC) and San Francisco Bay (SF), U.S.A. could foreshadow SLR effects on other coastal endemic species. Salt marsh vulnerabilities to SLR were...
Authors
Jordan A. Rosencranz, Karen M. Thorne, Kevin Buffington, Cory T. Overton, John Takekawa, Michael L. Casazza, Jennifer McBroom, Julian K. Wood, Nadav Nur, Richard L. Zembal, Glen M. MacDonald, Richard F. Ambrose
Duck nest depredation, predator behavior, and female response using video Duck nest depredation, predator behavior, and female response using video
Depredation plays an important role in determining duck nest success and predator and female duck behavior during nest depredation can influence nest fate. We examined depredation of mallard (Anas platyrhynchos) and gadwall (A. strepera) nests in Suisun Marsh, California, USA, in 2015–2016 with continuous infrared video monitoring to identify nest predators and characterize predator and...
Authors
Rebecca Croston, Joshua T. Ackerman, Mark P. Herzog, Jeffrey D. Kohl, C. Alex Hartman, Sarah H. Peterson, Cory T. Overton, Cliff L. Feldheim, Michael L. Casazza
Lessons from the past: isotopes of an endangered rail as indicators of underlying change to tidal marsh habitats Lessons from the past: isotopes of an endangered rail as indicators of underlying change to tidal marsh habitats
Introduction: Tidal marsh systems along the Pacific coast of the United States have experienced substantial stress and loss of area and ecosystem function, which we examined by using the endangered California Ridgway’s Rail, Rallus obsoletus obsoletus (‘rail’) as an indicator of its tidal marsh habitat in the San Francisco Estuary. We organized a collection of historical (1885-1940) and...
Authors
Angela M. Merritt, Michael L. Casazza, Cory T. Overton, John Y. Takekawa, Thomas P. Hahn, Joshua M. Hull
Environmental extremes and biotic interactions facilitate depredation of endangered California Ridgway’s rail in a San Francisco Bay tidal marsh Environmental extremes and biotic interactions facilitate depredation of endangered California Ridgway’s rail in a San Francisco Bay tidal marsh
On 23 December 2015 while performing a high tide population survey for endangered Ridgway’s rails (Rallus obsoletus obsoletus; formerly known as the California clapper rail) and other rail species at Arrowhead Marsh, Martin Luther King Jr. Regional Shoreline, Oakland, California, the authors observed a series of species interactions resulting in the predation of a Ridgway’s rail by an...
Authors
Cory T. Overton, Steven Bobzien, Marcia Grefsrud
A century of landscape disturbance and urbanization of the San Francisco Bay region affects the present-day genetic diversity of the California Ridgway’s rail (Rallus obsoletus obsoletus) A century of landscape disturbance and urbanization of the San Francisco Bay region affects the present-day genetic diversity of the California Ridgway’s rail (Rallus obsoletus obsoletus)
Fragmentation and loss of natural habitat have important consequences for wild populations and can negatively affect long-term viability and resilience to environmental change. Salt marsh obligate species, such as those that occupy the San Francisco Bay Estuary in western North America, occupy already impaired habitats as result of human development and modifications and are highly...
Authors
Dustin A. Wood, Thuy-Vy D. Bui, Cory T. Overton, Amy G. Vandergast, Michael L. Casazza, Joshua M. Hull, John Y. Takekawa
Science and Products
Filter Total Items: 22
No Result Found
Filter Total Items: 58
Using high resolution satellite and telemetry data to track flooded habitats, their use by waterfowl, and evaluate effects of drought on waterfowl and shorebird bioenergetics in California Using high resolution satellite and telemetry data to track flooded habitats, their use by waterfowl, and evaluate effects of drought on waterfowl and shorebird bioenergetics in California
Wetland managers in the Central Valley of California, a dynamic hydrological landscape, require information regarding the amount and location of existing wetland habitat to make decisions on how to best use water resources to support multiple wildlife objectives, particularly during drought. Scientists from the U.S. Geological Survey Western Ecological Research Center (WERC), Point Blue
Authors
Elliott Matchett, Matthew Reiter, Cory T. Overton, Dennis Jongsomjit, Michael L. Casazza
Waterfowl use of wetland habitats informs wetland restoration designs for multi‐species benefits Waterfowl use of wetland habitats informs wetland restoration designs for multi‐species benefits
Extensive global estuarine wetland losses have prompted intensive focus on restoration of these habitats. In California, substantial tracts of freshwater, brackish and tidal wetlands have been lost. Given the anthropogenic footprint of development and urbanization in this region, wetland restoration must rely on conversion of existing habitat types rather than adding new wetlands. These
Authors
Michael L. Casazza, Fiona McDuie, Scott Jones, Austen Lorenz, Cory T. Overton, Julie L. Yee, Cliff L. Feldheim, Joshua T. Ackerman, Karen M. Thorne
Ecological insights from three decades of animal movement tracking across a changing Arctic Ecological insights from three decades of animal movement tracking across a changing Arctic
The Arctic is entering a new ecological state, with alarming consequences for humanity. Animal-borne sensors offer a window into these changes. Although substantial animal tracking data from the Arctic and subarctic exist, most are difficult to discover and access. Here, we present the new Arctic Animal Movement Archive (AAMA), a growing collection of more than 200 standardized...
Authors
Sarah C Davidson, Gil Bohrer, Eliezer Gurarie, Scott LaPoint, Peter J Mahoney, Natalie Boelman, Jan UH Eitel, Laura R. Prugh, Lee A. Vierling, Jyoti Jennewein, Emma Grier, Ophelie Couriot, Allicia P Kelly, Arjan JH Meddens, Ruth Y Oliver, Roland Kays, Martin Wikelski, Tomas Aarvak, Joshua T. Ackerman, Monica Almeida e Silva, José A. Alves, Erin Bayne, Bryan Bedrosian, Jerrold L. Belant, Andrew M Berdahl, Alicia Berlin, Dominique Berteaux, Joel Bety, Dmitrij Boiko, Travis L. Booms, Bridget L Borg, Stan Boutin, W. Sean Boyd, Kane Brides, Stephen C. Brown, Victor N. Bulyuk, Kurt K Burnham, David Cabot, Michael L. Casazza, Katherine S. Christie, Erica H. Craig, Shanti E. Davis, Tracy Davison, Dominic Demma, Christopher R. DeSorbo, Andrew E. Dixon, Robert Domenech, Gotz Eichhorn, Kyle Elliott, Joseph R. Evenson, Klaus-Michael Exo, Steven Ferguson, Wolfgang Fiedler, Aaron T. Fisk, J. Fort, Alastair Franke, Mark R. Fuller, Stefan Garthe, Gilles Gauthier, Grant Gilchrist, Petr Glazov, Carrie E. Gray, David Gremillet, Larry Griffin, Mike Hallworth, Autumn-Lynn Harrison, Holly Hennin, J Mark Hipfner, James Hodson, James A. Johnson, Kyle Joly, Kimberly Jones, Todd E. Katzner, Jeff W Kidd, Elly Knight, Michael N. Kochert, Andrea Kolzsch, Helmut Kruckenberg, Benjamin J Lagassé, Sandra Lai, Jean-François Lamarre, Richard B. Lanctot, Nicholas C Larter, A David Latham, Christopher J. Latty, James P. Lawler, Don-Jean Leandri-Breton, Hansoo Lee, Stephen B. Lewis, Oliver P. Love, Jesper Madsen, Mark Maftei, Mark L. Mallory, Buck Mangipane, Mikhail Y. Markovets, Peter P. Marra, Rebecca L McGuire, Carol McIntyre, Emily A McKinnon, Tricia A. Miller, Sander Moonen, Tong Mu, Gerhard JDM Muskens, Janet Ng, Kerry L Nicholson, Ingar Jostein Oien, Cory T. Overton, Patricia A Owen, Allison G. L. Patterson, Aevar Petersen, Ivan Pokrovsky, Luke L. Powell, Rui Prieto, Petra Quillfeldt, Jennie Rausch, Kelsey Russell, Sarah T. Saalfeld, Hans Schekkerman, Joel A. Schmutz, Philipp Schwemmer, Dale R. Seip, Adam Shreading, Mónica A. Silva, Brian W. Smith, Fletcher Smith, Jeff P. Smith, Katherine RS Snell, Aleksandr Sokolov, Vasiliy Sokolov, Diana V Solovyeva, Mathew S Sorum, Grigori Tertitski, J. F. Therrien, Kasper Thorup, T. Lee Tibbitts, Ingrid Tulp, Brian D. Uher-Koch, Rob van Bemmelen, Steve Van Wilgenburg, Andrew L. Von Duyke, Jesse Watson, Bryan D Watts, Judy A Williams, Matthew Wilson, Jay Wright, Michael A Yates, David Yurkowski, Ramūnas Žydelis, Mark Hebblewhite
Gambel’s quail survey variability and implications for survey design in the Mohave Desert Gambel’s quail survey variability and implications for survey design in the Mohave Desert
Careful design of a wildlife population monitoring strategy is necessary to obtain accurate and precise results whether the purpose of the survey is development of habitat suitability models, to estimate abundance, or assess site occupancy. Important characteristics to consider in survey design are sources of elevated variability, particularly within‐subject variability, which increases...
Authors
Cory T. Overton, Michael L. Casazza, Daniel Connelley, Scott C. Gardner
Good prospects: High-resolution telemetry data suggests novel brood-site selection behavior in waterfowl Good prospects: High-resolution telemetry data suggests novel brood-site selection behavior in waterfowl
Breeding success should increase with prior knowledge of the surrounding environment, which is dependent upon an animal’s ability to evaluate habitat. Prospecting for nesting locations and migratory stop-over sites are well-established behaviors among bird species. We assessed whether ducks in Suisun Marsh, California, USA, a brackish marsh, prospect for suitable wetlands in the week...
Authors
Michael L. Casazza, Fiona McDuie, Austen Lorenz, David A. Keiter, Julie L. Yee, Cory T. Overton, Sarah H. Peterson, Cliff L. Feldheim, Joshua T. Ackerman
Moving at the speed of flight: Dabbling duck-movement rates and the relationship with electronic tracking interval Moving at the speed of flight: Dabbling duck-movement rates and the relationship with electronic tracking interval
Context. Effective wildlife management requires information on habitat and resource needs, which can be estimated with movement information and modelling energetics. One necessary component of avian models is flight speeds at multiple temporal scales. Technology has limited the ability to accurately assess flight speeds, leading to estimates of questionable accuracy, many of which have...
Authors
Fiona McDuie, Michael L. Casazza, David A. Keiter, Cory T. Overton, Mark P. Herzog, Cliff L. Feldheim, Joshua T. Ackerman
GPS tracking data reveals daily spatio-temporal movement patterns of waterfowl GPS tracking data reveals daily spatio-temporal movement patterns of waterfowl
Background Spatio-temporal patterns of movement can characterize relationships between organisms and their surroundings, and address gaps in our understanding of species ecology, activity budgets, bioenergetics, and habitat resource management. Highly mobile waterfowl, which can exploit resources over large spatial extents, are excellent models to understand relationships between...
Authors
Fiona McDuie, Michael L. Casazza, Cory T. Overton, Mark P. Herzog, C. Alex Hartman, Sarah H. Peterson, Cliff L. Feldheim, Joshua T. Ackerman
Rising tides: Assessing habitat vulnerability for an endangered salt marsh-dependent species with sea-level rise Rising tides: Assessing habitat vulnerability for an endangered salt marsh-dependent species with sea-level rise
Salt marsh-dependent species are vulnerable to impacts of sea-level rise (SLR). Site-specific differences in ecogeomorphic processes result in different SLR vulnerabilities. SLR impacts to Ridgway’s rail (Rallus obsoletus) of Southern California (SC) and San Francisco Bay (SF), U.S.A. could foreshadow SLR effects on other coastal endemic species. Salt marsh vulnerabilities to SLR were...
Authors
Jordan A. Rosencranz, Karen M. Thorne, Kevin Buffington, Cory T. Overton, John Takekawa, Michael L. Casazza, Jennifer McBroom, Julian K. Wood, Nadav Nur, Richard L. Zembal, Glen M. MacDonald, Richard F. Ambrose
Duck nest depredation, predator behavior, and female response using video Duck nest depredation, predator behavior, and female response using video
Depredation plays an important role in determining duck nest success and predator and female duck behavior during nest depredation can influence nest fate. We examined depredation of mallard (Anas platyrhynchos) and gadwall (A. strepera) nests in Suisun Marsh, California, USA, in 2015–2016 with continuous infrared video monitoring to identify nest predators and characterize predator and...
Authors
Rebecca Croston, Joshua T. Ackerman, Mark P. Herzog, Jeffrey D. Kohl, C. Alex Hartman, Sarah H. Peterson, Cory T. Overton, Cliff L. Feldheim, Michael L. Casazza
Lessons from the past: isotopes of an endangered rail as indicators of underlying change to tidal marsh habitats Lessons from the past: isotopes of an endangered rail as indicators of underlying change to tidal marsh habitats
Introduction: Tidal marsh systems along the Pacific coast of the United States have experienced substantial stress and loss of area and ecosystem function, which we examined by using the endangered California Ridgway’s Rail, Rallus obsoletus obsoletus (‘rail’) as an indicator of its tidal marsh habitat in the San Francisco Estuary. We organized a collection of historical (1885-1940) and...
Authors
Angela M. Merritt, Michael L. Casazza, Cory T. Overton, John Y. Takekawa, Thomas P. Hahn, Joshua M. Hull
Environmental extremes and biotic interactions facilitate depredation of endangered California Ridgway’s rail in a San Francisco Bay tidal marsh Environmental extremes and biotic interactions facilitate depredation of endangered California Ridgway’s rail in a San Francisco Bay tidal marsh
On 23 December 2015 while performing a high tide population survey for endangered Ridgway’s rails (Rallus obsoletus obsoletus; formerly known as the California clapper rail) and other rail species at Arrowhead Marsh, Martin Luther King Jr. Regional Shoreline, Oakland, California, the authors observed a series of species interactions resulting in the predation of a Ridgway’s rail by an...
Authors
Cory T. Overton, Steven Bobzien, Marcia Grefsrud
A century of landscape disturbance and urbanization of the San Francisco Bay region affects the present-day genetic diversity of the California Ridgway’s rail (Rallus obsoletus obsoletus) A century of landscape disturbance and urbanization of the San Francisco Bay region affects the present-day genetic diversity of the California Ridgway’s rail (Rallus obsoletus obsoletus)
Fragmentation and loss of natural habitat have important consequences for wild populations and can negatively affect long-term viability and resilience to environmental change. Salt marsh obligate species, such as those that occupy the San Francisco Bay Estuary in western North America, occupy already impaired habitats as result of human development and modifications and are highly...
Authors
Dustin A. Wood, Thuy-Vy D. Bui, Cory T. Overton, Amy G. Vandergast, Michael L. Casazza, Joshua M. Hull, John Y. Takekawa