Evan Grant, Ph.D.
Evan Grant the principle investigator of the US Geological Survey’s Amphibian Research and Monitoring Initiative (ARMI), northeast region.
Evan's research focuses on questions relating to amphibian populations, specifically with respect to their landscape-scale ecology. Evan also uses decision science to aid resource managers.
Education:
- PhD, 2009, University of Maryland College Park, Program of Marine, Estuarine and Environmental Sciences and Department of Entomology
- BS, 2001, Cornell University, Natural Resources, with Distinction in Research
Science and Products
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Please don't misuse the museum: 'declines' may be statistical Please don't misuse the museum: 'declines' may be statistical
Detecting declines in populations at broad spatial scales takes enormous effort, and long-term data are often more sparse than is desired for estimating trends, identifying drivers for population changes, framing conservation decisions or taking management actions. Museum records and historic data can be available at large scales across multiple decades, and are therefore an attractive...
Authors
Evan H. Campbell Grant
Inferences about population dynamics from count data using multi-state models: A comparison to capture-recapture approaches Inferences 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...
Authors
Evan H. Campbell Grant, Elise Zipkin, Sillett T. Scott, Richard Chandler, J. Andrew Royle
Modeling structured population dynamics using data from unmarked individuals Modeling 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...
Authors
Evan H. Campbell Grant, Elise Zipkin, James T. Thorson, Kevin See, Heather J. Lynch, Yoichiro Kanno, Richard Chandler, Benjamin H. Letcher, J. Andrew Royle
Management and monitoring of the endangered Shenandoah salamander under climate change: Workshop report 10-12 April 2012 Management and monitoring of the endangered Shenandoah salamander under climate change: Workshop report 10-12 April 2012
Here we report on a structured decision making (SDM) process to identify management strategies to ensure persistence of the federally endangered Shenandoah salamander (Plethodon shenandoah), given that it may be at increased extinction risk under projected climate change. The focus of this report is the second of two SDM workshops; in the first workshop, participants developed a...
Authors
Evan H. Campbell Grant, John E. B. Wofford, D. R. Smith, J. Dennis, C. Hawkins-Hoffman, J. Schaberl, M. Foley, M. Bogle
Stream water temperature limits occupancy of salamanders in mid-Atlantic protected areas Stream 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...
Authors
Evan H. Campbell Grant, Amber N. M. Wiewel, Karen C. Rice
Relaxing the closure assumption in single-season occupancy models: staggered arrival and departure times Relaxing 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...
Authors
William L. Kendall, James E. Hines, James D. Nichols, Evan H. Campbell Grant
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Science and Products
Filter Total Items: 21
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Filter Total Items: 148
Please don't misuse the museum: 'declines' may be statistical Please don't misuse the museum: 'declines' may be statistical
Detecting declines in populations at broad spatial scales takes enormous effort, and long-term data are often more sparse than is desired for estimating trends, identifying drivers for population changes, framing conservation decisions or taking management actions. Museum records and historic data can be available at large scales across multiple decades, and are therefore an attractive...
Authors
Evan H. Campbell Grant
Inferences about population dynamics from count data using multi-state models: A comparison to capture-recapture approaches Inferences 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...
Authors
Evan H. Campbell Grant, Elise Zipkin, Sillett T. Scott, Richard Chandler, J. Andrew Royle
Modeling structured population dynamics using data from unmarked individuals Modeling 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...
Authors
Evan H. Campbell Grant, Elise Zipkin, James T. Thorson, Kevin See, Heather J. Lynch, Yoichiro Kanno, Richard Chandler, Benjamin H. Letcher, J. Andrew Royle
Management and monitoring of the endangered Shenandoah salamander under climate change: Workshop report 10-12 April 2012 Management and monitoring of the endangered Shenandoah salamander under climate change: Workshop report 10-12 April 2012
Here we report on a structured decision making (SDM) process to identify management strategies to ensure persistence of the federally endangered Shenandoah salamander (Plethodon shenandoah), given that it may be at increased extinction risk under projected climate change. The focus of this report is the second of two SDM workshops; in the first workshop, participants developed a...
Authors
Evan H. Campbell Grant, John E. B. Wofford, D. R. Smith, J. Dennis, C. Hawkins-Hoffman, J. Schaberl, M. Foley, M. Bogle
Stream water temperature limits occupancy of salamanders in mid-Atlantic protected areas Stream 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...
Authors
Evan H. Campbell Grant, Amber N. M. Wiewel, Karen C. Rice
Relaxing the closure assumption in single-season occupancy models: staggered arrival and departure times Relaxing 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...
Authors
William L. Kendall, James E. Hines, James D. Nichols, Evan H. Campbell Grant
Filter Total Items: 15