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James Dyer Associate Professor of Geography Ph.D. 1992, University of Georgia |
| Contact Information |
e-mail: phone: fax: mailing address: |
dyer@ohio.edu 740.593.1142 740.593.1139 Department of Geography 122 Clippinger Labs Ohio University Athens OH 45701 |
Jump to: | Downloads Recent Research Projects Publications Graduate Student Theses Courses I Teach Useful Links |
| Downloads |
Water
Balance Toolbox for ArcGIS
and User Manual
from Dyer, J.M. 2009. Assessing
topographic patterns in moisture use
and stress using a water balance approach, Landscape Ecology 24: 391-403.
Revised Map of Braun's Forest Regions (image and ArcGIS shapefile) from
Dyer, J.M. 2006. Revisiting the
Deciduous Forests of Eastern North America. BioScience 56: 341-352.
Maps of the Ridges Land Lab Orthophotographs, historic air
photos, land cover maps, trails & contour maps for Ohio
University's Land Lab
|
| Recent Research Projects |
My recent research interests have focused
on predicting vegetation-site relationships, using a water balance
approach. Such an understanding is
critical for assessing the effects of future climate change, or to
evaluate
changes related to historic land use patterns. Since
plants respond to moisture supply and demand across
all geographic
scales, the water balance can serve as an effective predictor of
continental
range limits, or species occurrence within individual forest plots. I also have been actively exploring
changes in forest composition and structure in southeastern Ohio since
settlement. I have used witness tree records to construct
“baseline”
vegetation patterns, then drew upon archival land use records, historic
air
photos, and field sampling to examining the role of historic land use
in
shaping the present-day flora of central Appalachian forests.
Although southeastern
Ohio is heavily forested today, land use practices have left
distinctive “signatures”
on these communities. Ongoing research as a co-PI on an EPA STAR grant seeks to develop a classification system for gaging stream health. I am utilizing GIS to evaluate the role of landscape variables in affecting the chemical and biological conditions of streams in the Western Allegheny Plateau. |
| Publications Click here to view abstracts |
|
Dyer, J.M. (forthcoming) Land
use legacies in a central Appalachian forest: Differential response of
trees and herbs to historic agricultural practices. Applied Vegetation Science. Dyer, J.M. 2009. Assessing topographic patterns in moisture use and stress using a water balance approach, Landscape Ecology 24: 391-403. ArcGIS toolbox & user manual available as Download Dyer, J.M., and C.M. Cowell, 2008. Invasive Species and the Resiliency of a Riparian Environment. Pages 87-103 in R.K. Kohli and S. Jose (eds.) Invasive Plants and Forest Ecosystems. CRC Press, Boca Raton, FL. Dyer, J.M. 2006. Revisiting the Deciduous Forests of Eastern North America. BioScience 56: 341-352. Shapefile & image available as Download Dyer, J.M. 2004. A water budget approach to predicting tree species growth and abundance, utilizing paleoclimatology sources. Climate Research 28: 1-10. Dyer, J.M. 2002. A comparison of moisture scalars and water budget methods to assess vegetation-site relationships. Physical Geography, 23: 245-258. Cowell, C.M., and J.M. Dyer. 2002. Vegetation development in a modified riparian environment: Human imprints on an Allegheny River Wilderness. Annals of the Association of American Geographers 92: 189-202. Dyer, J.M. 2001. Using witness trees to assess forest change in southeastern Ohio. Canadian Journal of Forest Research, 31: 1708-1718. Dyer, J.M., and K.E. Moffett. 1999. Meadow invasion from high-elevation spruce-fir forest in south-central New Mexico. The Southwestern Naturalist 44: 445-457. Dyer, J.M., and P.R. Baird. 1997. Remnant forest stands at a prairie ecotone site: presettlement history and comparison with other maple-basswood stands. Physical Geography 18: 146-159. Dyer, J.M., and P.R. Baird. 1997. Wind disturbance in remnant forest stands along the prairie-forest ecotone, Minnesota, U.S.A. Plant Ecology 129: 121-137. Click here to see simulation of species migration in response to climate change Pitelka, L.F., and The Plant Migration Workshop Group. 1997. Plant migration and climate change. American Scientist 85: 464-473. Dyer, J.M. 1996. Considerations of scale and ecological processes in a forest migration model: a reply to Roth. Professional Geographer 48: 86-88. Dyer, J.M. 1995. Assessment of climatic warming using a model of forest species migration. Ecological Modelling 79: 199-219. Dyer, J.M. 1994. Implications of habitat fragmentation on climate change-induced forest migration. Professional Geographer 46: 449-459. Dyer, J.M. 1994. Land use pattern, forest migration, and global warming. Landscape and Urban Planning 29: 77-83. Dyer, J.M., and G.A. Brook. 1991. Spatial and temporal variations in temperate forest soil carbon dioxide during the non-growing season. Earth Surface Processes and Landforms 16: 411-426. |
| Graduate
Student Theses I've Advised Click here to view abstracts |
|
Microclimatic
and Topographic Controls of Fire Radiative Energy in Southeastern Ohio,
Loredana G. Suciu, Geography MA 2009. [Link
to PDF] Ecological Considerations for Risk Management of the Hemlock Woolly Adelgid in the Hocking Hills, Ohio USA, Nicole Stump, MSc 2008 (Albert-Ludwigs University). Using Landscape Variables to Assess Stream Health in Ohio’s Western Allegheny Plateau, Lisa King, Geography MA 2008. [Link to PDF] Predicting Infestations of Hemlock Woolly Adelgid (Adelges tsugae) in Great Smoky Mountains National Park Tennessee/North Carolina, USA, Scott Snider, Geography MA 2004. Exotic Plant Colonization of the Forest Adjacent to Transmission Line Corridors in Athens County, Ohio, Kaabe Shaw, MSES 2002. Linking Spatial Data with Population Viability Analysis: Reserve Network Design in the Northeastern Ecuadorian Amazon, Galo Zapato-Rios, MSES 2001. Land Use Land Cover Change From 1915 to 1999 in The Gwynns Falls Watershed, Baltimore County, Maryland: Creation of a Suburban Social Ecology, Michael Wehling, Geography MA 2001. Click here to view a summary with figures. The Biogeography of Gapper's Red-backed Vole (Clethrionomys gapperi): A Comparison of Genetic and Morphological Variation in Landscape Suitability: A Case Study of Wolf Habitat in Catastrophic Windthrow: A Case Study of the A Spatial Analysis of an Urban Fishery: A Case Study of |
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| Courses I Teach | Click on course title
for
syllabus from most-recent offering (Click here
if you need to download the Acrobat Reader.) Other course material available on Blackboard |
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| GEOG 101: | Physical Geography | ||
| GEOG 316/516 (BIOS 316/516): | Biogeography | ||
| GEOG 417/517: | Landscape Ecology | ||
| GEOG 476/576: | Field Methods | ||
| GEOG 570: | GIS Applications | ||
| GEOG 681A: | Seminar in Biogeography | ||
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Last Updated 5 January 2009