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
ResearcherID: N-5160-2014
Research Gate profile: http://www.researchgate.net/profile/Evan_Grant2
Science and Products
Filter Total Items: 20
Filter Total Items: 15
No Result Found
Filter Total Items: 130
Prevalence of the amphibian pathogen Batrachochytrium dendrobatidis in stream and wetland amphibians in Maryland, USA
The amphibian chytrid fungus Batrachochytrium dendrobatidis, responsible for the potentially fatal amphibian disease chytridiomycosis, is known to occur in a large and ever increasing number of amphibian populations around the world. However, sampling has been biased towards stream- and wetland-breeding anurans, with little attention paid to stream-associated salamanders. We sampled three frog and
Authors
Evan H. Campbell Grant, Larissa L. Bailey, Joy L. Ware, Karen L. Duncan
Visual implant elastomer mark retention through metamorphosis in amphibian larvae
Questions in population ecology require the study of marked animals, and marks are assumed to be permanent and not overlooked by observers. I evaluated retention through metamorphosis of visual implant elastomer marks in larval salamanders and frogs and assessed error in observer identification of these marks. I found 1) individual marks were not retained in larval wood frogs (Rana sylvatica), whe
Authors
Evan H. Campbell Grant
Living in the branches: Population dynamics and ecological processes in dendritic networks
Spatial structure regulates and modifies processes at several levels of ecological organization (e.g. individual/genetic, population and community) and is thus a key component of complex systems, where knowledge at a small scale can be insufficient for understanding system behaviour at a larger scale. Recent syntheses outline potential applications of network theory to ecological systems, but do
Authors
E.H.C. Grant, W.H. Lowe, W.F. Fagan
Are two methods better than one? Area constrained transects and leaf litterbags for sampling stream salamanders
No abstract available.
Authors
S.D. Mattfeldt, E.H.C. Grant
Addressing error in identification of Ambystoma maculatum (spotted salamanders) using spot patterns
No abstract available.
Authors
E.H.C. Grant, P. Nanjappa
The Amphibian Research and Monitoring Initiative (ARMI): 5-year report
The Amphibian Research and Monitoring Initiative (ARMI) is an innovative, multidisciplinary program that began in 2000 in response to a congressional directive for the Department of the Interior to address the issue of amphibian declines in the United States. ARMI’s formulation was cross-disciplinary, integrating U.S. Geological Survey scientists from Biology, Water, and Geography to develop a cou
Authors
Erin Muths, Alisa L. Gallant, Evan H. Campbell Grant, William A. Battaglin, David E. Green, Jennifer S. Staiger, Susan C. Walls, Margaret S. Gunzburger, Rick F. Kearney
Stream salamander species richness and abundance in relation to environmental factors in Shenandoah National Park, Virginia
Stream salamanders are sensitive to acid mine drainage and may be sensitive to acidification and low acid neutralizing capacity (ANC) of a watershed. Streams in Shenandoah National Park, Virginia, are subject to episodic acidification from precipitation events. We surveyed 25 m by 2 m transects located on the stream bank adjacent to the water channel in Shenandoah National Park for salamanders usi
Authors
Evan H. Campbell Grant, Robin E. Jung, Karen C. Rice
Double-observer approach to estimating egg mass abundance of vernal pool breeding amphibians
Interest in seasonally flooded pools, and the status of associated amphibian populations, has initiated programs in the northeastern United States to document and monitor these habitats. Counting egg masses is an effective way to determine the population size of pool-breeding amphibians, such as wood frogs (Rana sylvatica) and spotted salamanders (Ambystoma maculatum). However, bias is associated
Authors
Evan H. Campbell Grant, Robin E. Jung, James D. Nichols, James E. Hines
Correlates of vernal pool occurrence in the Massachusetts USA, landscape
Vernal pool wetlands are at risk of destruction across the northeast United States, due in part to their diminutive size and short hydroperiolds. These characteristics make it difficult to locate vernal pool habitats in the landscape during much of the year, and no efficient method exists for predicting their occurrence. A logistic regression procedure was used to identify large-scale variables th
Authors
Evan H. Campbell Grant
Natural history notes: Rana spp. (multiple ranid species). Hibernacula
No abstract available.
Authors
E.H.C. Grant, I. Chellman, P. Nanjappa, R.E. Jung
Science and Products
Filter Total Items: 20
Filter Total Items: 15
No Result Found
Filter Total Items: 130
Prevalence of the amphibian pathogen Batrachochytrium dendrobatidis in stream and wetland amphibians in Maryland, USA
The amphibian chytrid fungus Batrachochytrium dendrobatidis, responsible for the potentially fatal amphibian disease chytridiomycosis, is known to occur in a large and ever increasing number of amphibian populations around the world. However, sampling has been biased towards stream- and wetland-breeding anurans, with little attention paid to stream-associated salamanders. We sampled three frog and
Authors
Evan H. Campbell Grant, Larissa L. Bailey, Joy L. Ware, Karen L. Duncan
Visual implant elastomer mark retention through metamorphosis in amphibian larvae
Questions in population ecology require the study of marked animals, and marks are assumed to be permanent and not overlooked by observers. I evaluated retention through metamorphosis of visual implant elastomer marks in larval salamanders and frogs and assessed error in observer identification of these marks. I found 1) individual marks were not retained in larval wood frogs (Rana sylvatica), whe
Authors
Evan H. Campbell Grant
Living in the branches: Population dynamics and ecological processes in dendritic networks
Spatial structure regulates and modifies processes at several levels of ecological organization (e.g. individual/genetic, population and community) and is thus a key component of complex systems, where knowledge at a small scale can be insufficient for understanding system behaviour at a larger scale. Recent syntheses outline potential applications of network theory to ecological systems, but do
Authors
E.H.C. Grant, W.H. Lowe, W.F. Fagan
Are two methods better than one? Area constrained transects and leaf litterbags for sampling stream salamanders
No abstract available.
Authors
S.D. Mattfeldt, E.H.C. Grant
Addressing error in identification of Ambystoma maculatum (spotted salamanders) using spot patterns
No abstract available.
Authors
E.H.C. Grant, P. Nanjappa
The Amphibian Research and Monitoring Initiative (ARMI): 5-year report
The Amphibian Research and Monitoring Initiative (ARMI) is an innovative, multidisciplinary program that began in 2000 in response to a congressional directive for the Department of the Interior to address the issue of amphibian declines in the United States. ARMI’s formulation was cross-disciplinary, integrating U.S. Geological Survey scientists from Biology, Water, and Geography to develop a cou
Authors
Erin Muths, Alisa L. Gallant, Evan H. Campbell Grant, William A. Battaglin, David E. Green, Jennifer S. Staiger, Susan C. Walls, Margaret S. Gunzburger, Rick F. Kearney
Stream salamander species richness and abundance in relation to environmental factors in Shenandoah National Park, Virginia
Stream salamanders are sensitive to acid mine drainage and may be sensitive to acidification and low acid neutralizing capacity (ANC) of a watershed. Streams in Shenandoah National Park, Virginia, are subject to episodic acidification from precipitation events. We surveyed 25 m by 2 m transects located on the stream bank adjacent to the water channel in Shenandoah National Park for salamanders usi
Authors
Evan H. Campbell Grant, Robin E. Jung, Karen C. Rice
Double-observer approach to estimating egg mass abundance of vernal pool breeding amphibians
Interest in seasonally flooded pools, and the status of associated amphibian populations, has initiated programs in the northeastern United States to document and monitor these habitats. Counting egg masses is an effective way to determine the population size of pool-breeding amphibians, such as wood frogs (Rana sylvatica) and spotted salamanders (Ambystoma maculatum). However, bias is associated
Authors
Evan H. Campbell Grant, Robin E. Jung, James D. Nichols, James E. Hines
Correlates of vernal pool occurrence in the Massachusetts USA, landscape
Vernal pool wetlands are at risk of destruction across the northeast United States, due in part to their diminutive size and short hydroperiolds. These characteristics make it difficult to locate vernal pool habitats in the landscape during much of the year, and no efficient method exists for predicting their occurrence. A logistic regression procedure was used to identify large-scale variables th
Authors
Evan H. Campbell Grant
Natural history notes: Rana spp. (multiple ranid species). Hibernacula
No abstract available.
Authors
E.H.C. Grant, I. Chellman, P. Nanjappa, R.E. Jung