Susan Walls, Ph.D.
Susan Walls is a research wildlife biologist who serves as the coordinator and lead scientist for the southeastern region of the Amphibian Research and Monitoring Initiative (ARMI).
ARMI is a national program for which funding was appropriated by Congress in 2000 in response to mounting evidence and concern for declines of amphibians in the U.S. and worldwide. Susan's research group establishes and implements long-term monitoring of amphibians at key sites within the southeastern U.S. (AL, GA, FL, SC, NC and TN) and conducts research on potential causes of declines. The team focuses on model-based monitoring to assess the impacts of climate change, emerging diseases, habitat restoration, and invasive species on amphibian communities.
Science and Products
Filter Total Items: 61
Trends in amphibian occupancy in the United States Trends in amphibian occupancy in the United States
Though a third of amphibian species worldwide are thought to be imperiled, existing assessments simply categorize extinction risk, providing little information on the rate of population losses. We conducted the first analysis of the rate of change in the probability that amphibians occupy ponds and other comparable habitat features across the United States. We found that overall...
Authors
M. J. Adams, David A.W. Miller, Erin Muths, Paul Stephen Corn, Evan H. Campbell Grant, Larissa L. Bailey, Gary M. Fellers, Robert N. Fisher, Walter J. Sadinski, Hardin Waddle, Susan C. Walls
Influence of drought on salamander occupancy of isolated wetlands on the southeastern Coastal Plain of the United States Influence of drought on salamander occupancy of isolated wetlands on the southeastern Coastal Plain of the United States
In the southeastern U.S., changes in temperature and precipitation over the last three decades have been the most dramatic in winter and spring seasons. Continuation of these trends could negatively impact pond-breeding amphibians, especially those that rely on winter and spring rains to fill seasonal wetlands, trigger breeding, and ensure reproductive success. From 2009 to 2012, we...
Authors
Susan C. Walls, William J. Barichivich, Mary E. Brown, David E. Scott, Blake R. Hossack
Drought, deluge and declines: the impact of precipitation extremes on amphibians in a changing climate Drought, deluge and declines: the impact of precipitation extremes on amphibians in a changing climate
The Class Amphibia is one of the most severely impacted taxa in an on-going global biodiversity crisis. Because amphibian reproduction is tightly associated with the presence of water, climatic changes that affect water availability pose a particularly menacing threat to both aquatic and terrestrial-breeding amphibians. We explore the impacts that one facet of climate change—that of...
Authors
Susan C. Walls, William J. Barichivich, Mary E. Brown
Ambystoma talpoideum (Mole Salamander). Oviposition mode and timing Ambystoma talpoideum (Mole Salamander). Oviposition mode and timing
No abstract available.
Authors
S.C. Walls, W.J. Barichivich, M.E. Brown
Estimating occupancy dynamics in an anuran assemblage from Louisiana, USA Estimating occupancy dynamics in an anuran assemblage from Louisiana, USA
Effective monitoring programs are designed to track changes in the distribution, occurrence, and abundance of species. We developed an extension of Royle and Kéry's (2007) single species model to estimate simultaneously temporal changes in probabilities of detection, occupancy, colonization, extinction, and species turnover using data on calling anuran amphibians, collected from 2002 to...
Authors
Susan C. Walls, J. Hardin Waddle, Robert M. Dorazio
Effects of conservation practices on wetland ecosystem services in the Mississippi Alluvial Valley Effects of conservation practices on wetland ecosystem services in the Mississippi Alluvial Valley
Restoration of wetland ecosystems is an important priority for many state and federal agencies, as well as nongovernmental conservation organizations. The historic conversion of wetlands in the Mississippi Alluvial Valley (MAV) has resulted in large‐scale implementation of a variety of conservation practices designed to restore and enhance wetland ecosystem services. As a consequence...
Authors
Stephen Faulkner, Wylie C. Barrow, Bob Keeland, Susan E. Walls, David Telesco
Science and Products
Filter Total Items: 61
Trends in amphibian occupancy in the United States Trends in amphibian occupancy in the United States
Though a third of amphibian species worldwide are thought to be imperiled, existing assessments simply categorize extinction risk, providing little information on the rate of population losses. We conducted the first analysis of the rate of change in the probability that amphibians occupy ponds and other comparable habitat features across the United States. We found that overall...
Authors
M. J. Adams, David A.W. Miller, Erin Muths, Paul Stephen Corn, Evan H. Campbell Grant, Larissa L. Bailey, Gary M. Fellers, Robert N. Fisher, Walter J. Sadinski, Hardin Waddle, Susan C. Walls
Influence of drought on salamander occupancy of isolated wetlands on the southeastern Coastal Plain of the United States Influence of drought on salamander occupancy of isolated wetlands on the southeastern Coastal Plain of the United States
In the southeastern U.S., changes in temperature and precipitation over the last three decades have been the most dramatic in winter and spring seasons. Continuation of these trends could negatively impact pond-breeding amphibians, especially those that rely on winter and spring rains to fill seasonal wetlands, trigger breeding, and ensure reproductive success. From 2009 to 2012, we...
Authors
Susan C. Walls, William J. Barichivich, Mary E. Brown, David E. Scott, Blake R. Hossack
Drought, deluge and declines: the impact of precipitation extremes on amphibians in a changing climate Drought, deluge and declines: the impact of precipitation extremes on amphibians in a changing climate
The Class Amphibia is one of the most severely impacted taxa in an on-going global biodiversity crisis. Because amphibian reproduction is tightly associated with the presence of water, climatic changes that affect water availability pose a particularly menacing threat to both aquatic and terrestrial-breeding amphibians. We explore the impacts that one facet of climate change—that of...
Authors
Susan C. Walls, William J. Barichivich, Mary E. Brown
Ambystoma talpoideum (Mole Salamander). Oviposition mode and timing Ambystoma talpoideum (Mole Salamander). Oviposition mode and timing
No abstract available.
Authors
S.C. Walls, W.J. Barichivich, M.E. Brown
Estimating occupancy dynamics in an anuran assemblage from Louisiana, USA Estimating occupancy dynamics in an anuran assemblage from Louisiana, USA
Effective monitoring programs are designed to track changes in the distribution, occurrence, and abundance of species. We developed an extension of Royle and Kéry's (2007) single species model to estimate simultaneously temporal changes in probabilities of detection, occupancy, colonization, extinction, and species turnover using data on calling anuran amphibians, collected from 2002 to...
Authors
Susan C. Walls, J. Hardin Waddle, Robert M. Dorazio
Effects of conservation practices on wetland ecosystem services in the Mississippi Alluvial Valley Effects of conservation practices on wetland ecosystem services in the Mississippi Alluvial Valley
Restoration of wetland ecosystems is an important priority for many state and federal agencies, as well as nongovernmental conservation organizations. The historic conversion of wetlands in the Mississippi Alluvial Valley (MAV) has resulted in large‐scale implementation of a variety of conservation practices designed to restore and enhance wetland ecosystem services. As a consequence...
Authors
Stephen Faulkner, Wylie C. Barrow, Bob Keeland, Susan E. Walls, David Telesco