Evan Grant

Research Wildlife Biologist

Short Biography

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

Miller, DA, JD Nichols, BA McClintock, EHC Grant, LL Bailey, L Weir. Improving estimates of occupancy when two forms of observation error occur: non-detection and species misidentification. In press, Ecology.

 Gratwicke, B, M Evans, EHC Grant, J. Greathouse,  WJ McShea, N Rotzel and RC Fleischer. Low prevalence of Batrachochytrium dendrobatidis detected in Appalachian salamanders from Warren County, Virginia, USA. Herpetological Review 42(2), 217–219

 Kennedy, CM, EHC Grant, WF Fagan, PP Marra and MC Neel. Landscape matrix mediates occupancy dynamics of neotropical avian insectivores. In press, Ecological Applications.

Lynch, HJ, EHC Grant, R Muneepeerakul, M Arunachalam, I Rodriguez-Iturbe and WF Fagan.  How restructuring river connectivity changes freshwater fish biodiversity and biogeography.  In press, Water Resources Research.

 Brown, BL, CM Swan, D Auerbach, C Patrick and EHC Grant.  2011. Advancing theory of community assembly in spatially structured environments: local vs regional processes in river networks. Journal of the North American Benthological Society 30:232-234

 Grant, EHC. 2011. Structural complexity, movement bias and metapopulation extinction risk in dendritic ecological networks. Journal of the North American Benthological Society 30:252–258.

 Grant, EHC. 2010. Book Review: Amphibian Ecology and Conservation: A Handbook of Techniques. Herpetological Review. 41: 393-396.

 Hossack, BL, MJ Adams, EHC Grant, CA Pearl, JB Bettaso, WJ Barichivich, WH Lowe, K True, JL Ware, and PS Corn. 2010. Low prevalence of chytrid fungus (Batrachochytrium dendrobatidis) in U. S. headwater amphibians. In press, Journal of Herpetology Journal of Herpetology 44:253-260.

 Grant, EHC, JD Nichols, WH Lowe and WF Fagan. 2010. Overland movement facilitates amphibian persistence in stream networks. Proceedings of the National Academy of Sciences, USA 107:6936-6940.

 Grant, EHC. 2010. Organized Oral Session 16. Linking data and theory in dendritic ecological networks: from ecological problems to rapid understanding. Bulletin of the Ecological Society of America 91:65-67.

 Fagan, WF, EHC Grant, HJ Lynch & PJ Unmack.  2009. Riverine landscapes: ecology for an alternative geometry. Pages 85-101 In Cantrell, RS and C Cosner (eds.), Spatial Ecology. Academic Press.

 Grant, EHC, LE Green and WH Lowe. 2009. Salamander occupancy in dendritic ecological networks. Freshwater Biology 54: 1370-1378

 Mattfeldt, SD, LL Bailey, and EHC Grant. 2009. Monitoring multiple species: estimating site occupancy, local colonization, extinction and exploring the efficacy of a monitoring program. Biological Conservation142: 720-737

 Grant, EHC.  2008. Assessing visual implant elastomer mark retention in amphibian larvae through metamorphosis. Journal of Wildlife Management 72:1247-52.

 Grant, EHC, LL Bailey, JL Ware, and KC Duncan. 2008. The amphibian pathogen Batrachochytrium dendrobatidis detected in a community of stream and wetland amphibians. Applied Herpetology 5: 233-241

 Nichols, JD, LL Bailey, AF O’Connell, Jr., NW Talancy, EHC Grant, AT Gilbert, EM Annand, TP Husband and JE Hines. 2008.  Multi-scale occupancy estimation and modeling using multiple detection methods.  Journal of Applied Ecology. 45:1321-1329

 Van Meter, R., LL Bailey, and EHC Grant. Methods for Estimating the Amount of Vernal Pool Habitat in the Northeastern United States. Wetlands 28: 585-593

 Grant, EHC, WH Lowe and WF Fagan.  2007. Living in the branches: population dynamics and ecological processes in dendritic networks.  Ecology Letters 10: 165-175.

 SD Mattfeldt and EHC Grant.  2007. Are two methods better than one?  Area constrained transects and leaf litterbags for sampling stream salamanders.  Herpetological Review 38: 43-45

 Muths, E, AL Gallant, EHC Grant, WA Battaglin, DE Green, J Staiger, S Walls, M. Gunzburger and R Kearney. 2006. Amphibian Research and Monitoring Initiative: 5 year report. U.S. Geological Survey Scientific Investigations Report 2006-5224, 77 p.

 Grant, EHC and P Nanjappa.  2006. Individual identification of spotted salamanders (Ambystoma maculatum) using spot patterns with recommendations for an improved method. Herpetological Review 37:57-60.

 Grant, EHC.  2005. Correlates of vernal pool occurrence in a Massachusetts landscape.  Wetlands. 25: 480-487.

 Grant, EHC, RE Jung, and KC Rice. 2005.  Stream Salamander Species Richness and Abundance in Relation to Environmental Factors in Shenandoah National Park, Virginia. American Midland Naturalist 153: 348-356.

 Grant, EHC, RE Jung, JD Nichols and JE Hines. 2005. Double observer counts of egg masses.  Wetlands Ecology and Management 13: 305-320.

My Science Topics

My USGS Science Strategy Areas

Active projects:

Movement ecology of stream salamanders

Dendritic network ecology

 Dynamics of vernal pool breeding amphibian populations

 Management of amphibian populations in the National Capital Region Network of National Parks

Planning a management response to population change in the endangered Shenandoah salamander

I am the principle investigator of the US Geological Survey’s Amphibian Research and Monitoring Initiative, northeast region (BRD).  My research focuses on questions relating to amphibian populations, specifically with respect to their landscape-scale ecology and conservation.  My work is focused on monitoring and research questions which can aid resource managers and conservationists.