Terry Shaffer (Former Employee)
Science and Products
Filter Total Items: 38
Demographics and movements of least terns and piping plovers in the Central Platte River Valley, Nebraska
The Central Platte River Valley provides breeding habitat for a variety of migratory birds, including federally endangered interior least terns (Sternula antillarum; least tern) and threatened piping plovers (Charadrius melodus). Since 2009, researchers have collected demographic data on both species that span their lifecycle (that is, from egg laying through survival of adults). Demographic data
Authors
Erin A. Roche, Mark H. Sherfy, Megan M. Ring, Terry L. Shaffer, Michael J. Anteau, Jennifer H. Stucker
Synchrony of Piping Plover breeding populations in the U.S. Northern Great Plains
Local populations that fluctuate synchronously are at a greater risk of extinction than those that do not. The closer the geographic proximity of populations, the more prone they are to synchronizing. Shorebird species select habitat broadly, and many breed across regions with diverse nesting habitat types. Under these conditions, nearby populations may experience conditions sufficiently different
Authors
Erin A. Roche, Terry L. Shaffer, Colin M. Dovichin, Mark H. Sherfy, Michael J. Anteau, Mark T. Wiltermuth
Do ducks and songbirds initiate more nests when the probability of survival is greater?
Nesting chronology in grassland birds can vary by species, locality, and year. The date a nest is initiated can influence the subsequent probability of its survival in some grassland bird species. Because predation is the most significant cause of nest loss in grassland birds, we examined the relation between timing of nesting and nest survival. Periods of high nest survival that correspond with t
Authors
Todd A. Grant, Terry L. Shaffer
Landscape selection by piping plovers has implications for measuring habitat and population size
How breeding birds distribute in relation to landscape-scale habitat features has important implications for conservation because those features may constrain habitat suitability. Furthermore, knowledge of these associations can help build models to improve area-wide demographic estimates or to develop a sampling stratification for research and monitoring. This is particularly important for rare s
Authors
Michael J. Anteau, Terry L. Shaffer, Mark T. Wiltermuth, Mark H. Sherfy
Detection probability of least tern and piping plover chicks in a large river system
Monitoring the abundance and stability of populations of conservation concern is often complicated by an inability to perfectly detect all members of the population. Mark-recapture offers a flexible framework in which one may identify factors contributing to imperfect detection, while at the same time estimating demographic parameters such as abundance or survival. We individually color-marked, re
Authors
Erin A. Roche, Terry L. Shaffer, Michael J. Anteau, Mark H. Sherfy, Jennifer H. Stucker, Mark T. Wiltermuth, Colin M. Dovichin
The role of landscape features and density dependence in growth and fledging rates of Piping Plovers in North Dakota, USA
For species with precocial young, survival from hatching to fledging is a key factor influencing recruitment. Furthermore, growth rates of precocial chicks are an indicator of forage quality and habitat suitability of brood-rearing areas. We examined how growth and fledging rates of Piping Plover (Charadrius melodus) chicks were influenced by landscape features, such as hatchling density (hatchli
Authors
Michael J. Anteau, Mark T. Wiltermuth, Mark H. Sherfy, Terry L. Shaffer, Aaron T. Pearse
Establishing endangered species recovery criteria using predictive simulation modeling
Listing a species under the Endangered Species Act (ESA) and developing a recovery plan requires U.S. Fish and Wildlife Service to establish specific and measurable criteria for delisting. Generally, species are listed because they face (or are perceived to face) elevated risk of extinction due to issues such as habitat loss, invasive species, or other factors. Recovery plans identify recovery cri
Authors
Conor P. McGowan, Daniel H. Catlin, Terry L. Shaffer, Cheri L. Gratto-Trevor, Carol Aron
Accuracy of the Missouri River Least Tern and Piping Plover Monitoring Program: considerations for the future
The upper Missouri River system provides nesting and foraging habitat for federally endangered least terns (Sternula antillarum; hereafter “terns”) and threatened piping plovers (Charadrius melodus; hereafter “plovers”). These species are the subject of substantial management interest on the Missouri River for several reasons. First, ecosystem recovery is a goal for management agencies that seek t
Authors
Terry L. Shaffer, Mark H. Sherfy, Michael J. Anteau, Jennifer H. Stucker, Marsha A. Sovada, Erin A. Roche, Mark T. Wiltermuth, Thomas K. Buhl, Colin M. Dovichin
Measuring and predicting abundance and dynamics of habitat for piping plovers on a large reservoir
Measuring habitat and understanding habitat dynamics have become increasingly important for wildlife conservation. Using remotely-sensed data, we developed procedures to measure breeding habitat abundance for the federally listed piping plover (Charadrius melodus) at Lake Sakakawea, North Dakota, USA. We also developed a model to predict habitat abundance based on past and projected water levels,
Authors
Michael J. Anteau, Mark T. Wiltermuth, Mark H. Sherfy, Terry L. Shaffer
Songbird abundance in native and planted grassland varies with type and amount of grassland in the surrounding landscape
Agriculture and wildlife conservation programs have converted vast amounts of cropland into grasslands planted with exotic species. Understanding how landscape context influences avian use of native and planted grasslands is essential for developing effective conservation strategies in agricultural landscapes. Our primary objective was to determine the extent to which the amount and type of grassl
Authors
Stephen K. Davis, Ryan Fisher, Susan Skinner, Terry L. Shaffer, R. Mark Brigham
Spatial education: improving conservation delivery through space-structured decision making
Adaptive management is a form of structured decision making designed to guide management of natural resource systems when their behaviors are uncertain. Where decision making can be replicated across units of a landscape, learning can be accelerated, and biological processes can be understood in a larger spatial context. Broad-based partnerships among land management agencies, exemplified by Lands
Authors
Clinton T. Moore, Terry L. Shaffer, Jill J. Gannon
Native Prairie Adaptive Management: a multi region adaptive approach to invasive plant management on Fish and Wildlife Service owned native prairies
Much of the native prairie managed by the U.S. Fish and Wildlife Service (FWS) in the Prairie Pothole Region (PPR) of the northern Great Plains is extensively invaded by the introduced cool-season grasses, smooth brome (Bromus inermis) and Kentucky bluegrass (Poa pratensis). Management to suppress these invasive plants has had poor to inconsistent success. The central challenge to managers is sele
Authors
Jill J. Gannon, Terry L. Shaffer, Clinton T. Moore
Science and Products
Filter Total Items: 38
Demographics and movements of least terns and piping plovers in the Central Platte River Valley, Nebraska
The Central Platte River Valley provides breeding habitat for a variety of migratory birds, including federally endangered interior least terns (Sternula antillarum; least tern) and threatened piping plovers (Charadrius melodus). Since 2009, researchers have collected demographic data on both species that span their lifecycle (that is, from egg laying through survival of adults). Demographic data
Authors
Erin A. Roche, Mark H. Sherfy, Megan M. Ring, Terry L. Shaffer, Michael J. Anteau, Jennifer H. Stucker
Synchrony of Piping Plover breeding populations in the U.S. Northern Great Plains
Local populations that fluctuate synchronously are at a greater risk of extinction than those that do not. The closer the geographic proximity of populations, the more prone they are to synchronizing. Shorebird species select habitat broadly, and many breed across regions with diverse nesting habitat types. Under these conditions, nearby populations may experience conditions sufficiently different
Authors
Erin A. Roche, Terry L. Shaffer, Colin M. Dovichin, Mark H. Sherfy, Michael J. Anteau, Mark T. Wiltermuth
Do ducks and songbirds initiate more nests when the probability of survival is greater?
Nesting chronology in grassland birds can vary by species, locality, and year. The date a nest is initiated can influence the subsequent probability of its survival in some grassland bird species. Because predation is the most significant cause of nest loss in grassland birds, we examined the relation between timing of nesting and nest survival. Periods of high nest survival that correspond with t
Authors
Todd A. Grant, Terry L. Shaffer
Landscape selection by piping plovers has implications for measuring habitat and population size
How breeding birds distribute in relation to landscape-scale habitat features has important implications for conservation because those features may constrain habitat suitability. Furthermore, knowledge of these associations can help build models to improve area-wide demographic estimates or to develop a sampling stratification for research and monitoring. This is particularly important for rare s
Authors
Michael J. Anteau, Terry L. Shaffer, Mark T. Wiltermuth, Mark H. Sherfy
Detection probability of least tern and piping plover chicks in a large river system
Monitoring the abundance and stability of populations of conservation concern is often complicated by an inability to perfectly detect all members of the population. Mark-recapture offers a flexible framework in which one may identify factors contributing to imperfect detection, while at the same time estimating demographic parameters such as abundance or survival. We individually color-marked, re
Authors
Erin A. Roche, Terry L. Shaffer, Michael J. Anteau, Mark H. Sherfy, Jennifer H. Stucker, Mark T. Wiltermuth, Colin M. Dovichin
The role of landscape features and density dependence in growth and fledging rates of Piping Plovers in North Dakota, USA
For species with precocial young, survival from hatching to fledging is a key factor influencing recruitment. Furthermore, growth rates of precocial chicks are an indicator of forage quality and habitat suitability of brood-rearing areas. We examined how growth and fledging rates of Piping Plover (Charadrius melodus) chicks were influenced by landscape features, such as hatchling density (hatchli
Authors
Michael J. Anteau, Mark T. Wiltermuth, Mark H. Sherfy, Terry L. Shaffer, Aaron T. Pearse
Establishing endangered species recovery criteria using predictive simulation modeling
Listing a species under the Endangered Species Act (ESA) and developing a recovery plan requires U.S. Fish and Wildlife Service to establish specific and measurable criteria for delisting. Generally, species are listed because they face (or are perceived to face) elevated risk of extinction due to issues such as habitat loss, invasive species, or other factors. Recovery plans identify recovery cri
Authors
Conor P. McGowan, Daniel H. Catlin, Terry L. Shaffer, Cheri L. Gratto-Trevor, Carol Aron
Accuracy of the Missouri River Least Tern and Piping Plover Monitoring Program: considerations for the future
The upper Missouri River system provides nesting and foraging habitat for federally endangered least terns (Sternula antillarum; hereafter “terns”) and threatened piping plovers (Charadrius melodus; hereafter “plovers”). These species are the subject of substantial management interest on the Missouri River for several reasons. First, ecosystem recovery is a goal for management agencies that seek t
Authors
Terry L. Shaffer, Mark H. Sherfy, Michael J. Anteau, Jennifer H. Stucker, Marsha A. Sovada, Erin A. Roche, Mark T. Wiltermuth, Thomas K. Buhl, Colin M. Dovichin
Measuring and predicting abundance and dynamics of habitat for piping plovers on a large reservoir
Measuring habitat and understanding habitat dynamics have become increasingly important for wildlife conservation. Using remotely-sensed data, we developed procedures to measure breeding habitat abundance for the federally listed piping plover (Charadrius melodus) at Lake Sakakawea, North Dakota, USA. We also developed a model to predict habitat abundance based on past and projected water levels,
Authors
Michael J. Anteau, Mark T. Wiltermuth, Mark H. Sherfy, Terry L. Shaffer
Songbird abundance in native and planted grassland varies with type and amount of grassland in the surrounding landscape
Agriculture and wildlife conservation programs have converted vast amounts of cropland into grasslands planted with exotic species. Understanding how landscape context influences avian use of native and planted grasslands is essential for developing effective conservation strategies in agricultural landscapes. Our primary objective was to determine the extent to which the amount and type of grassl
Authors
Stephen K. Davis, Ryan Fisher, Susan Skinner, Terry L. Shaffer, R. Mark Brigham
Spatial education: improving conservation delivery through space-structured decision making
Adaptive management is a form of structured decision making designed to guide management of natural resource systems when their behaviors are uncertain. Where decision making can be replicated across units of a landscape, learning can be accelerated, and biological processes can be understood in a larger spatial context. Broad-based partnerships among land management agencies, exemplified by Lands
Authors
Clinton T. Moore, Terry L. Shaffer, Jill J. Gannon
Native Prairie Adaptive Management: a multi region adaptive approach to invasive plant management on Fish and Wildlife Service owned native prairies
Much of the native prairie managed by the U.S. Fish and Wildlife Service (FWS) in the Prairie Pothole Region (PPR) of the northern Great Plains is extensively invaded by the introduced cool-season grasses, smooth brome (Bromus inermis) and Kentucky bluegrass (Poa pratensis). Management to suppress these invasive plants has had poor to inconsistent success. The central challenge to managers is sele
Authors
Jill J. Gannon, Terry L. Shaffer, Clinton T. Moore