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Jeffrey J. Duda, Research Ecologist, Ecology Section
Email: Jeff Duda
M.S. Ecology, Wayne State University, 1998; B.S. Biology, Wayne State University, 1993.
Jeff conducts ecological research in three primary areas. The first is studying the ecological effects of river restoration and dam removal on the Elwha River. In 2008, two dams will be removed from the Elwha River, allowing anadromous salmonids to return to over 70 miles of spawning habitat in Olympic National Park. Research scientists from multiple state and federal agencies, and numerous universities are involved in a collaborative interdisciplinary research program for the Elwha. The second area of research, with Dr. John Emlen, involves developing an ecological modeling approach that determines the population growth dynamics of species as functions of their ecological surroundings. This approach, called Interaction Assessment (INTASS), uses emergent patterns of dispersion to parameterize population models. Once parameterized, population growth projections of a species, as a function of competitors, predators, and physical factors, can be placed in a management context. Currently, INTASS models are being developed for multiple taxa and systems. The third research program involves the development of ecological indicators of landscape change for use at military installations in the southeastern United States. Primarily, this involves studying aspects of terrestrial systems, such as ant and vegetation communities, physical habitat properties, and soil microbial dynamics, that respond in a predictable and correlative way to disturbance from military training activities.
Representative Publications:
Graham, J.H., H.H. Hughie, S. Jones, K. Wrinn, A.J. Krzysik,
J.J. Duda, D.C. Freeman, J.M. Emlen, J.C. Zak, C. Chamberlin-Graham,
and H.E. Balbach. 2004. Habitat disturbance and the diversity
and abundance of ants (Formicidae) in the southeastern Fall-Line
Sandhills. 15 pp. Journal of Insect Science 4:30. Available online:
insectscience.org/4.30.
Freeman, D.C., M.L. Brown, J.J. Duda, J.H. Graham, J.M. Emlen,
A.J. Krzysik, H.E. Balbach, D.A. Kovacic, and J.C. Zak. Leaf fluctuating
asymmetry, soil disturbance, and plant stress: A multiple year
comparison using two herbs, Ipomoea pandurata and Cnidoscolus
stimulosus. Ecological Indicators. In Press.
Freeman, D.C., M.L. Brown, J.J. Duda, J.H. Graham, J.M. Emlen,
A.J. Krzysik, J.C. Zak, and D.A. Kovacic. 2004. Developmental
instability in Rhus copallinum L.: multiple stressors,
years, and responses. International Journal of Plant Science 165(1):53-63.
Freeman, D.C., M.L. Brown, J.J. Duda, J.H. Graham, J.M. Emlen,
A.J. Krzysik, H.E. Balbach, D.A. Kovacic, and J.C. Zak. 2004.
Photosynthesis and fluctuating asymmetry as indicators of plant
response to soil disturbance in the Fall-Line Sandhills of Georgia:
A case study using Rhus copallinum and Ipomoea pandurata.
International Journal of Plant Science 165(5):805-816.
Freilich, J.E., J.M. Emlen, J.J. Duda, D.C. Freeman, and P.J. Cafaro. 2003. Ecological effects of ranching: A six-point critique. BioScience 53(8):759-765. Journal
Article in PDF Format
Duda, J.J., D.C. Freeman, M. Brown, J.M. Emlen, J.H. Graham, A.J. Krzysik,
J.C. Zak, and D.A. Kovacic. 2004. Estimating disturbance effects
from military training using developmental instability and physiological
measures of plant stress. Ecological Indicators 3(4):252-262.
Emlen, J.M., D.C. Freeman, M.D. Kirchhoff, C.L. Alados, J. Escos, and J.J. Duda. 2003. Fitting population models from field data. Ecological Modeling 162:119-143. Journal
Article in PDF Format
Duda, J.J., D.C. Freeman, J.M. Emlen, J. Belnap, S.G. Kitchen,
J.C. Zak, E. Sobek, M. Tracy, and J. Montante. 2003. Differences
in native soil ecology associated with invasion of the exotic
annual chenopod, Halogeton glomeratus. Biology and Fertility
of Soils 38(2):72-77. Journal
Article in PDF Format
Duda, J.J., A.J. Krzysik, and J.M Meloche. 2002. Spatial organization of desert tortoises and their burrows at a landscape scale. Chelonian Conservation and Biology 4(2):387-397. Journal
Article in PDF Format
Duda, J.J., A.J. Krzysik, and J.E. Frelich. 1999. Effects of drought on desert tortoise movement and activity. Journal of Wildlife Management 63:1181-1192.
Mailing Address:
U.S. Geological Survey
Western Fisheries Research Center
6505 NE 65th St.
Seattle, WA 98115
Phone: 206-526-6282
Fax: 206-526-6654
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