Northeast Amphibian Research and Monitoring Initiative Active
Shenandoah Salamander
Plethodon shenandoah
Overlook at Shenandoah National Park
The U.S. Geological Survey’s Eastern Ecological Science Center is home to the Northeast Amphibian Research and Monitoring Initiative (NEARMI), one of 7 ARMI regions across the United States. NEARMI works on public lands in thirteen states from Maine to Virginia, including many National Parks and National Wildlife Refuges.
Dr. Evan H. Campbell Grant coordinates ARMI activities in the Northeast by conducting and developing amphibian research and monitoring projects. Research by NEARMI staff at the US Geological Survey's Eastern Ecological Science Center provides public land managers (like the National Park Service and US Fish and Wildlife Service) information they need on the current status of amphibians, how amphibian distributions have change or are expected to change over time, and threats to populations. Data from the Northeast is also used collaboratively to evaluate questions about amphibian declines, threats, and changes over time at larger spatial scales.
NEARMI works to provide timely science not only about common, widespread species, but also to assist with conservation of species at risk and those being evaluated for listing under the Endangered Species Act. Work on these species may include field surveys, data analysis, or decision support for local managers. Many NEARMI projects are long-term collaborations and involve decision science, a set of tools and techniques for evaluating multiple goals and unknowns to aid resource management decisions.
Below are other science projects associated with this project.
Below are publications associated with this project.
Inferences about population dynamics from count data using multi-state models: A comparison to capture-recapture approaches
Modeling structured population dynamics using data from unmarked individuals
Stream water temperature limits occupancy of salamanders in mid-Atlantic protected areas
Relaxing the closure assumption in single-season occupancy models: staggered arrival and departure times
Trends in amphibian occupancy in the United States
Presence-only modeling using MAXENT: when can we trust the inferences?
Evaluating the predictive abilities of community occupancy models using AUC while accounting for imperfect detection
Experimental investigation of false positive errors in auditory species occurrence surveys
Interbasin water transfer, riverine connectivity, and spatial controls on fish biodiversity
Structural complexity, movement bias, and metapopulation extinction risk in dendritic ecological networks
Landscape matrix mediates occupancy dynamics of Neotropical avian insectivores
How restructuring river connectivity changes freshwater fish biodiversity and biogeography
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Below are FAQ associated with this project.
Below are partners associated with this project. For a complete list for Partners and Collaborators click here.
- Overview
The U.S. Geological Survey’s Eastern Ecological Science Center is home to the Northeast Amphibian Research and Monitoring Initiative (NEARMI), one of 7 ARMI regions across the United States. NEARMI works on public lands in thirteen states from Maine to Virginia, including many National Parks and National Wildlife Refuges.
Dr. Evan H. Campbell Grant coordinates ARMI activities in the Northeast by conducting and developing amphibian research and monitoring projects. Research by NEARMI staff at the US Geological Survey's Eastern Ecological Science Center provides public land managers (like the National Park Service and US Fish and Wildlife Service) information they need on the current status of amphibians, how amphibian distributions have change or are expected to change over time, and threats to populations. Data from the Northeast is also used collaboratively to evaluate questions about amphibian declines, threats, and changes over time at larger spatial scales.
NEARMI works to provide timely science not only about common, widespread species, but also to assist with conservation of species at risk and those being evaluated for listing under the Endangered Species Act. Work on these species may include field surveys, data analysis, or decision support for local managers. Many NEARMI projects are long-term collaborations and involve decision science, a set of tools and techniques for evaluating multiple goals and unknowns to aid resource management decisions. - Science
Below are other science projects associated with this project.
- Publications
Below are publications associated with this project.
Filter Total Items: 79Inferences about population dynamics from count data using multi-state models: A comparison to capture-recapture approaches
Wildlife populations consist of individuals that contribute disproportionately to growth and viability. Understanding a population's spatial and temporal dynamics requires estimates of abundance and demographic rates that account for this heterogeneity. Estimating these quantities can be difficult, requiring years of intensive data collection. Often, this is accomplished through the capture and reAuthorsEvan H. Campbell Grant, Elise Zipkin, Sillett T. Scott, Richard Chandler, J. Andrew RoyleModeling structured population dynamics using data from unmarked individuals
The study of population dynamics requires unbiased, precise estimates of abundance and vital rates that account for the demographic structure inherent in all wildlife and plant populations. Traditionally, these estimates have only been available through approaches that rely on intensive mark–recapture data. We extended recently developed N-mixture models to demonstrate how demographic parameters aAuthorsEvan H. Campbell Grant, Elise Zipkin, James T. Thorson, Kevin See, Heather J. Lynch, Yoichiro Kanno, Richard Chandler, Benjamin H. Letcher, J. Andrew RoyleStream water temperature limits occupancy of salamanders in mid-Atlantic protected areas
Stream ecosystems are particularly sensitive to urbanization, and tolerance of water-quality parameters is likely important to population persistence of stream salamanders. Forecasted climate and landscape changes may lead to significant changes in stream flow, chemical composition, and temperatures in coming decades. Protected areas where landscape alterations are minimized will therefore becomeAuthorsEvan H. Campbell Grant, Amber N. M. Wiewel, Karen C. RiceRelaxing the closure assumption in single-season occupancy models: staggered arrival and departure times
Occupancy statistical models that account for imperfect detection have proved very useful in several areas of ecology, including species distribution and spatial dynamics, disease ecology, and ecological responses to climate change. These models are based on the collection of multiple samples at each of a number of sites within a given season, during which it is assumed the species is either absenAuthorsWilliam L. Kendall, James E. Hines, James D. Nichols, Evan H. Campbell GrantTrends 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 occupancy by amphiAuthorsM. 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. WallsPresence-only modeling using MAXENT: when can we trust the inferences?
1. Recently, interest in species distribution modelling has increased following the development of new methods for the analysis of presence-only data and the deployment of these methods in user-friendly and powerful computer programs. However, reliable inference from these powerful tools requires that several assumptions be met, including the assumptions that observed presences are the consequenceAuthorsCharles B. Yackulic, Richard Chandler, Elise F. Zipkin, J. Andrew Royle, James D. Nichols, Evan H. Campbell Grant, Sophie VeranEvaluating the predictive abilities of community occupancy models using AUC while accounting for imperfect detection
The ability to accurately predict patterns of species' occurrences is fundamental to the successful management of animal communities. To determine optimal management strategies, it is essential to understand species-habitat relationships and how species habitat use is related to natural or human-induced environmental changes. Using five years of monitoring data in the Chesapeake and Ohio Canal NAuthorsElise F. Zipkin, Evan H. Campbell Grant, William F. FaganExperimental investigation of false positive errors in auditory species occurrence surveys
False positive errors are a significant component of many ecological data sets, which in combination with false negative errors, can lead to severe biases in conclusions about ecological systems. We present results of a field experiment where observers recorded observations for known combinations of electronically broadcast calling anurans under conditions mimicking field surveys to determine specAuthorsDavid A.W. Miller, Linda A. Weir, Brett T. McClintock, Evan H. Campbell Grant, Larissa L. Bailey, Theodore R. SimonsInterbasin water transfer, riverine connectivity, and spatial controls on fish biodiversity
Background Large-scale inter-basin water transfer (IBWT) projects are commonly proposed as solutions to water distribution and supply problems. These problems are likely to intensify under future population growth and climate change scenarios. Scarce data on the distribution of freshwater fishes frequently limits the ability to assess the potential implications of an IBWT project on freshwater fisAuthorsEvan H. Campbell Grant, Heather J. Lynch, Rachata Muneepeerakul, Arunachalam Muthukumarasamy, Ignacio Rodríguez-Iturbe, William F. FaganStructural complexity, movement bias, and metapopulation extinction risk in dendritic ecological networks
Spatial complexity in metacommunities can be separated into 3 main components: size (i.e., number of habitat patches), spatial arrangement of habitat patches (network topology), and diversity of habitat patch types. Much attention has been paid to lattice-type networks, such as patch-based metapopulations, but interest in understanding ecological networks of alternative geometries is building. DenAuthorsEvan H. Campbell GrantLandscape matrix mediates occupancy dynamics of Neotropical avian insectivores
In addition to patch‐level attributes (i.e., area and isolation), the nature of land cover between habitat patches (the matrix) may drive colonization and extinction dynamics in fragmented landscapes. Despite a long‐standing recognition of matrix effects in fragmented systems, an understanding of the relative impacts of different types of land cover on patterns and dynamics of species occurrence rAuthorsChristina M. Kennedy, Evan H. Campbell Grant, Maile C. Neel, William F. Fagan, Peter P. MarraHow restructuring river connectivity changes freshwater fish biodiversity and biogeography
Interbasin water transfer projects, in which river connectivity is restructured via man-made canals, are an increasingly popular solution to address the spatial mismatch between supply and demand of fresh water. However, the ecological consequences of such restructuring remain largely unexplored, and there are no general theoretical guidelines from which to derive these expectations. River systemsAuthorsHeather L. Lynch, Evan H. Campbell Grant, Rachata Muneepeerakul, Muthukumarasamy Arunachalam, Ignacio Rodriguez-Iturbe, William F. Fagan - News
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- Partners
Below are partners associated with this project. For a complete list for Partners and Collaborators click here.