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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Use of multiple dispersal pathways facilitates amphibian persistence in stream networks Use of multiple dispersal pathways facilitates amphibian persistence in stream networks
Although populations of amphibians are declining worldwide, there is no evidence that salamanders occupying small streams are experiencing enigmatic declines, and populations of these species seem stable. Theory predicts that dispersal through multiple pathways can stabilize populations, preventing extinction in habitat networks. However, empirical data to support this prediction are...
Authors
Grant E.H. Campbell, J.D. Nichols, W.H. Lowe, W.F. Fagan
Low prevalence of chytrid fungus (Batrachochytrium dendrobatidis) in amphibians of U.S. headwater streams Low prevalence of chytrid fungus (Batrachochytrium dendrobatidis) in amphibians of U.S. headwater streams
Many declines of amphibian populations have been associated with chytridiomycosis, a disease caused by the aquatic fungus Batrachochytrium dendrobatidis (Bd). Despite the relatively high prevalence of chytridiomycosis in stream amphibians globally, most surveys in North America have focused primarily on wetland-associated species, which are frequently infected. To better understand the
Authors
Blake R. Hossack, M. J. Adams, Evan H. Campbell Grant, Chistopher A. Pearl, James B. Bettaso, William J. Barichivich, Winsor H. Lowe, Kimberly TRUE, Joy L. Ware, Paul Stephen Corn
Monitoring multiple species: Estimating state variables and exploring the efficacy of a monitoring program Monitoring multiple species: Estimating state variables and exploring the efficacy of a monitoring program
Monitoring programs have the potential to identify population declines and differentiate among the possible cause(s) of these declines. Recent criticisms regarding the design of monitoring programs have highlighted a failure to clearly state objectives and to address detectability and spatial sampling issues. Here, we incorporate these criticisms to design an efficient monitoring program...
Authors
S.D. Mattfeldt, L.L. Bailey, E.H.C. Grant
Salamander occupancy in headwater stream networks Salamander occupancy in headwater stream networks
1. Stream ecosystems exhibit a highly consistent dendritic geometry in which linear habitat units intersect to create a hierarchical network of connected branches. 2. Ecological and life history traits of species living in streams, such as the potential for overland movement, may interact with this architecture to shape patterns of occupancy and response to disturbance. Specifically...
Authors
E.H.C. Grant, L.E. Green, W.H. Lowe
Prevalence of the amphibian pathogen Batrachochytrium dendrobatidis in stream and wetland amphibians in Maryland, USA 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...
Authors
Evan H. Campbell Grant, Larissa L. Bailey, Joy L. Ware, Karen L. Duncan
Multi-scale occupancy estimation and modelling using multiple detection methods Multi-scale occupancy estimation and modelling using multiple detection methods
Occupancy estimation and modelling based on detection–nondetection data provide an effective way of exploring change in a species’ distribution across time and space in cases where the species is not always detected with certainty. Today, many monitoring programmes target multiple species, or life stages within a species, requiring the use of multiple detection methods. When multiple...
Authors
James D. Nichols, Larissa L. Bailey, Allan F. O’Connell, Neil W. Talancy, Evan H. Campbell Grant, Andrew T. Gilbert, Elizabeth M. Annand, Thomas P. Husband, James E. Hines
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Science and Products
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No Result Found
Filter Total Items: 148
Use of multiple dispersal pathways facilitates amphibian persistence in stream networks Use of multiple dispersal pathways facilitates amphibian persistence in stream networks
Although populations of amphibians are declining worldwide, there is no evidence that salamanders occupying small streams are experiencing enigmatic declines, and populations of these species seem stable. Theory predicts that dispersal through multiple pathways can stabilize populations, preventing extinction in habitat networks. However, empirical data to support this prediction are...
Authors
Grant E.H. Campbell, J.D. Nichols, W.H. Lowe, W.F. Fagan
Low prevalence of chytrid fungus (Batrachochytrium dendrobatidis) in amphibians of U.S. headwater streams Low prevalence of chytrid fungus (Batrachochytrium dendrobatidis) in amphibians of U.S. headwater streams
Many declines of amphibian populations have been associated with chytridiomycosis, a disease caused by the aquatic fungus Batrachochytrium dendrobatidis (Bd). Despite the relatively high prevalence of chytridiomycosis in stream amphibians globally, most surveys in North America have focused primarily on wetland-associated species, which are frequently infected. To better understand the
Authors
Blake R. Hossack, M. J. Adams, Evan H. Campbell Grant, Chistopher A. Pearl, James B. Bettaso, William J. Barichivich, Winsor H. Lowe, Kimberly TRUE, Joy L. Ware, Paul Stephen Corn
Monitoring multiple species: Estimating state variables and exploring the efficacy of a monitoring program Monitoring multiple species: Estimating state variables and exploring the efficacy of a monitoring program
Monitoring programs have the potential to identify population declines and differentiate among the possible cause(s) of these declines. Recent criticisms regarding the design of monitoring programs have highlighted a failure to clearly state objectives and to address detectability and spatial sampling issues. Here, we incorporate these criticisms to design an efficient monitoring program...
Authors
S.D. Mattfeldt, L.L. Bailey, E.H.C. Grant
Salamander occupancy in headwater stream networks Salamander occupancy in headwater stream networks
1. Stream ecosystems exhibit a highly consistent dendritic geometry in which linear habitat units intersect to create a hierarchical network of connected branches. 2. Ecological and life history traits of species living in streams, such as the potential for overland movement, may interact with this architecture to shape patterns of occupancy and response to disturbance. Specifically...
Authors
E.H.C. Grant, L.E. Green, W.H. Lowe
Prevalence of the amphibian pathogen Batrachochytrium dendrobatidis in stream and wetland amphibians in Maryland, USA 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...
Authors
Evan H. Campbell Grant, Larissa L. Bailey, Joy L. Ware, Karen L. Duncan
Multi-scale occupancy estimation and modelling using multiple detection methods Multi-scale occupancy estimation and modelling using multiple detection methods
Occupancy estimation and modelling based on detection–nondetection data provide an effective way of exploring change in a species’ distribution across time and space in cases where the species is not always detected with certainty. Today, many monitoring programmes target multiple species, or life stages within a species, requiring the use of multiple detection methods. When multiple...
Authors
James D. Nichols, Larissa L. Bailey, Allan F. O’Connell, Neil W. Talancy, Evan H. Campbell Grant, Andrew T. Gilbert, Elizabeth M. Annand, Thomas P. Husband, James E. Hines
Filter Total Items: 15