Mary Freeman, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 8
Filter Total Items: 4
No Result Found
Filter Total Items: 110
Multispecies approaches to status assessments in support of endangered species classifications Multispecies approaches to status assessments in support of endangered species classifications
Multispecies risk assessments have developed within many international conservation programs, reflecting a widespread need for efficiency. Under the United States Endangered Species Act (ESA), multispecies assessments ultimately lead to species-level listing decisions. Although this approach provides opportunities for improved efficiency, it also risks overwhelming or biasing the...
Authors
Daniel Fitzgerald, Mary Freeman, Kelly Maloney, John Young, Amanda Rosenberger, David C. Kazyak, David Smith
Toward improved prediction of streamflow effects on freshwater fishes Toward improved prediction of streamflow effects on freshwater fishes
Understanding the effects of hydrology on fish populations is essential to managing for native fish conservation. However, despite decades of research illustrating streamflow influences on fish habitat, reproduction and survival, biologists remain challenged when tasked with predicting how fish populations will respond to changes in flow regimes. This uncertainty stems from insufficient
Authors
Mary Freeman, Kevin R. Bestgen, Daren Carlisle, Emmanuel Frimpong, Nathan Franssen, Ketih Gido, Elise Irwin, Yoichiro Kanno, Charles Luce, S. McKay, Meryl Mims, Julian D. Olden, N. Poff, David Propst, Laura Rack, Allison Roy, Edward Stowe, Annika Walters, Seth J. Wenger
Effects of stream intermittency on minnow (Leuciscidae) and darter (Percidae) trophic dynamics in an agricultural watershed Effects of stream intermittency on minnow (Leuciscidae) and darter (Percidae) trophic dynamics in an agricultural watershed
Stream intermittency is predicted to increase where water withdrawals and climate warming are increasing. In regions coupled with high fish diversity, understanding how intermittency influences fish trophic ecology is critical for informing ecosystem function. This study compared fish diets across seasons in perennial and intermittent streams to estimate the immediate and cumulative...
Authors
Christine Fallon, Krista A. Capps, Mary Freeman, Chelsea Smith, Stephen Golladay
Evaluating the impact of watershed development and climate change on stream ecosystems: A Bayesian network modeling approach Evaluating the impact of watershed development and climate change on stream ecosystems: A Bayesian network modeling approach
A continuous-variable Bayesian network (cBN) model is used to link watershed development and climate change to stream ecosystem indicators. A graphical model, reflecting our understanding of the connections between climate change, weather condition, loss of natural land cover, stream flow characteristics, and stream ecosystem indicators is used as the basis for selecting flow metrics for
Authors
Song Qian, Jonathan G. Kennen, Jason May, Mary Freeman, Thomas Cuffney
Do crayfish affect stream ecosystem response to riparian vegetation removal? Do crayfish affect stream ecosystem response to riparian vegetation removal?
1. Riparian vegetation management alters stream basal resources, but stream ecosystem responses partly depend on top-down interactions with in-stream consumers. Large-bodied omnivores can exert particularly strong influences on stream benthic environments through consumption of food resources and physical disturbance of the benthos. Trophic dynamics studies conducted within the context...
Authors
Maura Dudley, Kelsey Solomon, Seth J. Wenger, C. Jackson, Mary Freeman, Katherine Elliott, Chelcy F. Miniat, Catherine Pringle
Integrating tracking and resight data enables unbiased inferences about migratory connectivity and winter range survival from archival tags Integrating tracking and resight data enables unbiased inferences about migratory connectivity and winter range survival from archival tags
Archival geolocators have transformed the study of small, migratory organisms but analysis of data from these devices requires bias correction because tags are only recovered from individuals that survive and are re-captured at their tagging location. We show that integrating geolocator recovery data and mark–resight data enables unbiased estimates of both migratory connectivity between...
Authors
Clark Rushing, Aimee Van Tatenhove, Andrew Sharp, Viviana Ruiz-Gutierrez, Mary Freeman, Paul Sykes, Aaron Given, T. Scott Sillett
Slow recovery of headwater-stream fishes following a catastrophic poisoning event Slow recovery of headwater-stream fishes following a catastrophic poisoning event
Accidental spills of chemicals and other pollutants can decimate populations of stream-dwelling species. Recovery from such accidents can be relatively fast and complete when the affected stream reaches can be recolonized from upstream and downstream sources. However, faunal recoveries from accidental spills that extirpate populations from entire headwater streams have not been...
Authors
Mary Freeman, Duncan Elkins, Peter Maholland, Zachary Butler, Maxwell Kleinhans, Jonathan Skaggs, Edward Stowe, Carrie Straight, Seth J. Wenger
Mixed evidence for biotic homogenization of southern Appalachian fish communities Mixed evidence for biotic homogenization of southern Appalachian fish communities
Anthropogenic impacts on the landscape can drive biotic homogenization, whereby distinct biological communities become more similar to one another over time. Land-use change in the Southern Appalachian region is expected to result in homogenization of the highly diverse freshwater fish communities as in-stream habitat alterations favor widespread cosmopolitan species at the expense of...
Authors
Kelly Petersen, Mary Freeman, Joseph Kirsch, William O McLarney, Mark C Scott, Seth J. Wenger
A Bayesian framework for assessing extinction risk based on ordinal categories of population condition and projected landscape change A Bayesian framework for assessing extinction risk based on ordinal categories of population condition and projected landscape change
Many at-risk species lack standardized surveys across their range or quantitative data capable of detecting demographic trends. As a result, extinction risk assessments often rely on ordinal categories of risk based on explicit criteria or expert elicitation. This study demonstrates a Bayesian approach to assessing extinction risk based on this common data structure, using three...
Authors
Daniel Fitzgerald, Andrew Henderson, Kelly Maloney, Mary Freeman, John Young, Amanda Rosenberger, David C. Kazyak, David Smith
Ecological forecasting—21st century science for 21st century management Ecological forecasting—21st century science for 21st century management
Natural resource managers are coping with rapid changes in both environmental conditions and ecosystems. Enabled by recent advances in data collection and assimilation, short-term ecological forecasting may be a powerful tool to help resource managers anticipate impending near-term changes in ecosystem conditions or dynamics. Managers may use the information in forecasts to minimize the...
Authors
John Bradford, Jake Weltzin, Molly McCormick, Jill Baron, Zack Bowen, Sky Bristol, Daren Carlisle, Theresa Crimmins, Paul C. Cross, Joe DeVivo, Mike Dietze, Mary Freeman, Jason Goldberg, Mevin Hooten, Leslie Hsu, Karen Jenni, Jennifer Keisman, Jonathan G. Kennen, Kathy Lee, David Lesmes, Keith Loftin, Brian Miller, Peter Murdoch, Jana Newman, Karen Prentice, Imtiaz Rangwala, Jordan Read, Jennifer Sieracki, Helen Sofaer, Steve Thur, Gordon Toevs, Francisco Werner, C. White, Timothy White, Mark Wiltermuth
By
Ecosystems Mission Area, Water Resources Mission Area, Science Synthesis, Analysis and Research Program, Contaminant Biology, Environmental Health Program, Science Analytics and Synthesis (SAS) Program, Central Plains Water Science Center, Eastern Ecological Science Center, Fort Collins Science Center, Kansas Water Science Center, Maryland-Delaware-D.C. Water Science Center, National Wildlife Health Center, New Jersey Water Science Center, Pacific Island Ecosystems Research Center, Southwest Biological Science Center, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center
Incorporating spatial synchrony in the status assessment of a threatened species with multivariate analysis Incorporating spatial synchrony in the status assessment of a threatened species with multivariate analysis
Spatial synchrony—correlated abundance fluctuations among distinct populations—is associated with increased extinction risk but is not a component of widely-used extinction risk assessments (e.g., IUCN Red List, U.S. Fish and Wildlife Service’s Species Status Assessment). Alongside traditional viability metrics (i.e., the number of populations, their spatial extent, the status of each...
Authors
Edward Stowe, Seth J. Wenger, Mary Freeman, Byron Freeman
Rethinking foundation species in a changing world: The case for Rhododendron maximum as an emerging foundation species in shifting ecosystems of the southern Appalachians Rethinking foundation species in a changing world: The case for Rhododendron maximum as an emerging foundation species in shifting ecosystems of the southern Appalachians
“Foundation species” are widespread, abundant species that play critical roles in structuring ecosystem characteristics and processes. Ecosystem change in response to human activities, climate change, disease introduction, or other environmental conditions may promote the emergence of new foundation species or the decline of previously important foundation species. We present...
Authors
Maura Dudley, Mary Freeman, Seth J. Wenger, C. Jackson, Catherine Pringle
Science and Products
Filter Total Items: 8
Filter Total Items: 4
No Result Found
Filter Total Items: 110
Multispecies approaches to status assessments in support of endangered species classifications Multispecies approaches to status assessments in support of endangered species classifications
Multispecies risk assessments have developed within many international conservation programs, reflecting a widespread need for efficiency. Under the United States Endangered Species Act (ESA), multispecies assessments ultimately lead to species-level listing decisions. Although this approach provides opportunities for improved efficiency, it also risks overwhelming or biasing the...
Authors
Daniel Fitzgerald, Mary Freeman, Kelly Maloney, John Young, Amanda Rosenberger, David C. Kazyak, David Smith
Toward improved prediction of streamflow effects on freshwater fishes Toward improved prediction of streamflow effects on freshwater fishes
Understanding the effects of hydrology on fish populations is essential to managing for native fish conservation. However, despite decades of research illustrating streamflow influences on fish habitat, reproduction and survival, biologists remain challenged when tasked with predicting how fish populations will respond to changes in flow regimes. This uncertainty stems from insufficient
Authors
Mary Freeman, Kevin R. Bestgen, Daren Carlisle, Emmanuel Frimpong, Nathan Franssen, Ketih Gido, Elise Irwin, Yoichiro Kanno, Charles Luce, S. McKay, Meryl Mims, Julian D. Olden, N. Poff, David Propst, Laura Rack, Allison Roy, Edward Stowe, Annika Walters, Seth J. Wenger
Effects of stream intermittency on minnow (Leuciscidae) and darter (Percidae) trophic dynamics in an agricultural watershed Effects of stream intermittency on minnow (Leuciscidae) and darter (Percidae) trophic dynamics in an agricultural watershed
Stream intermittency is predicted to increase where water withdrawals and climate warming are increasing. In regions coupled with high fish diversity, understanding how intermittency influences fish trophic ecology is critical for informing ecosystem function. This study compared fish diets across seasons in perennial and intermittent streams to estimate the immediate and cumulative...
Authors
Christine Fallon, Krista A. Capps, Mary Freeman, Chelsea Smith, Stephen Golladay
Evaluating the impact of watershed development and climate change on stream ecosystems: A Bayesian network modeling approach Evaluating the impact of watershed development and climate change on stream ecosystems: A Bayesian network modeling approach
A continuous-variable Bayesian network (cBN) model is used to link watershed development and climate change to stream ecosystem indicators. A graphical model, reflecting our understanding of the connections between climate change, weather condition, loss of natural land cover, stream flow characteristics, and stream ecosystem indicators is used as the basis for selecting flow metrics for
Authors
Song Qian, Jonathan G. Kennen, Jason May, Mary Freeman, Thomas Cuffney
Do crayfish affect stream ecosystem response to riparian vegetation removal? Do crayfish affect stream ecosystem response to riparian vegetation removal?
1. Riparian vegetation management alters stream basal resources, but stream ecosystem responses partly depend on top-down interactions with in-stream consumers. Large-bodied omnivores can exert particularly strong influences on stream benthic environments through consumption of food resources and physical disturbance of the benthos. Trophic dynamics studies conducted within the context...
Authors
Maura Dudley, Kelsey Solomon, Seth J. Wenger, C. Jackson, Mary Freeman, Katherine Elliott, Chelcy F. Miniat, Catherine Pringle
Integrating tracking and resight data enables unbiased inferences about migratory connectivity and winter range survival from archival tags Integrating tracking and resight data enables unbiased inferences about migratory connectivity and winter range survival from archival tags
Archival geolocators have transformed the study of small, migratory organisms but analysis of data from these devices requires bias correction because tags are only recovered from individuals that survive and are re-captured at their tagging location. We show that integrating geolocator recovery data and mark–resight data enables unbiased estimates of both migratory connectivity between...
Authors
Clark Rushing, Aimee Van Tatenhove, Andrew Sharp, Viviana Ruiz-Gutierrez, Mary Freeman, Paul Sykes, Aaron Given, T. Scott Sillett
Slow recovery of headwater-stream fishes following a catastrophic poisoning event Slow recovery of headwater-stream fishes following a catastrophic poisoning event
Accidental spills of chemicals and other pollutants can decimate populations of stream-dwelling species. Recovery from such accidents can be relatively fast and complete when the affected stream reaches can be recolonized from upstream and downstream sources. However, faunal recoveries from accidental spills that extirpate populations from entire headwater streams have not been...
Authors
Mary Freeman, Duncan Elkins, Peter Maholland, Zachary Butler, Maxwell Kleinhans, Jonathan Skaggs, Edward Stowe, Carrie Straight, Seth J. Wenger
Mixed evidence for biotic homogenization of southern Appalachian fish communities Mixed evidence for biotic homogenization of southern Appalachian fish communities
Anthropogenic impacts on the landscape can drive biotic homogenization, whereby distinct biological communities become more similar to one another over time. Land-use change in the Southern Appalachian region is expected to result in homogenization of the highly diverse freshwater fish communities as in-stream habitat alterations favor widespread cosmopolitan species at the expense of...
Authors
Kelly Petersen, Mary Freeman, Joseph Kirsch, William O McLarney, Mark C Scott, Seth J. Wenger
A Bayesian framework for assessing extinction risk based on ordinal categories of population condition and projected landscape change A Bayesian framework for assessing extinction risk based on ordinal categories of population condition and projected landscape change
Many at-risk species lack standardized surveys across their range or quantitative data capable of detecting demographic trends. As a result, extinction risk assessments often rely on ordinal categories of risk based on explicit criteria or expert elicitation. This study demonstrates a Bayesian approach to assessing extinction risk based on this common data structure, using three...
Authors
Daniel Fitzgerald, Andrew Henderson, Kelly Maloney, Mary Freeman, John Young, Amanda Rosenberger, David C. Kazyak, David Smith
Ecological forecasting—21st century science for 21st century management Ecological forecasting—21st century science for 21st century management
Natural resource managers are coping with rapid changes in both environmental conditions and ecosystems. Enabled by recent advances in data collection and assimilation, short-term ecological forecasting may be a powerful tool to help resource managers anticipate impending near-term changes in ecosystem conditions or dynamics. Managers may use the information in forecasts to minimize the...
Authors
John Bradford, Jake Weltzin, Molly McCormick, Jill Baron, Zack Bowen, Sky Bristol, Daren Carlisle, Theresa Crimmins, Paul C. Cross, Joe DeVivo, Mike Dietze, Mary Freeman, Jason Goldberg, Mevin Hooten, Leslie Hsu, Karen Jenni, Jennifer Keisman, Jonathan G. Kennen, Kathy Lee, David Lesmes, Keith Loftin, Brian Miller, Peter Murdoch, Jana Newman, Karen Prentice, Imtiaz Rangwala, Jordan Read, Jennifer Sieracki, Helen Sofaer, Steve Thur, Gordon Toevs, Francisco Werner, C. White, Timothy White, Mark Wiltermuth
By
Ecosystems Mission Area, Water Resources Mission Area, Science Synthesis, Analysis and Research Program, Contaminant Biology, Environmental Health Program, Science Analytics and Synthesis (SAS) Program, Central Plains Water Science Center, Eastern Ecological Science Center, Fort Collins Science Center, Kansas Water Science Center, Maryland-Delaware-D.C. Water Science Center, National Wildlife Health Center, New Jersey Water Science Center, Pacific Island Ecosystems Research Center, Southwest Biological Science Center, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center
Incorporating spatial synchrony in the status assessment of a threatened species with multivariate analysis Incorporating spatial synchrony in the status assessment of a threatened species with multivariate analysis
Spatial synchrony—correlated abundance fluctuations among distinct populations—is associated with increased extinction risk but is not a component of widely-used extinction risk assessments (e.g., IUCN Red List, U.S. Fish and Wildlife Service’s Species Status Assessment). Alongside traditional viability metrics (i.e., the number of populations, their spatial extent, the status of each...
Authors
Edward Stowe, Seth J. Wenger, Mary Freeman, Byron Freeman
Rethinking foundation species in a changing world: The case for Rhododendron maximum as an emerging foundation species in shifting ecosystems of the southern Appalachians Rethinking foundation species in a changing world: The case for Rhododendron maximum as an emerging foundation species in shifting ecosystems of the southern Appalachians
“Foundation species” are widespread, abundant species that play critical roles in structuring ecosystem characteristics and processes. Ecosystem change in response to human activities, climate change, disease introduction, or other environmental conditions may promote the emergence of new foundation species or the decline of previously important foundation species. We present...
Authors
Maura Dudley, Mary Freeman, Seth J. Wenger, C. Jackson, Catherine Pringle