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Sigrid Smith Ph.D.

Assistant Professor / Biostatistician
Department of Agriculture and Natural Resources
College of Agriculture and Related Sciences
Delaware State University
ssmith [at] desu.edu


Ph.D., Program in Ecology, Evolution, and Conservation Biology, Univ. of Illinois at Urbana-Champaign, 2010
B.S., Biology, Environmental Studies, Tufts Univ., 2003


NTRS 456/644 Wetlands biology
NTRS 321 Biometrics (introductory biostatistics)
AGRI 501 Advanced statistical techniques for data analysis
NTRS 506 Experimental design

Current research

Response of wetland plant communities to human impacts:
The composition of wetlands can change a lot from place to place and over time, especially in small wetlands and ponds that dry during part of the year.  However, the natural long-term changes in plants and their responses to new stresses such as climate change are not well documented.  I’ve been working in wetlands in southwest Michigan and am currently expanding to Delmarva bays (coastal plain ponds) and sinkhole ponds in the mid-Atlantic region, looking at the influences of water level changes and agriculture on plant communities.

Mapping human impacts and ecosystem services in coastal communities:
Healthy lakes and coastal ecosystems benefit humans by providing recreational opportunities, flood mitigation, and many other ecosystem services.  This delivery of services may be affected by human activities (environmental stressors), but the feedbacks between stressors and services are not well studied in many ecosystems.  With detailed spatial data, we can begin to link where human activities occur, how they affect the biological communities in those places, and how those impacts affect the benefits that humans enjoy from the ecosystem.  I have been working with collaborators to explore this interplay between nature and people in the Laurentian Great Lakes and am starting to explore mid-Atlantic coastal waters.

Publications (selected)

Allan, J.D., N.F. Manning, S.D.P. Smith, C.E. Dickinson, C.A. Joseph, and D.R. Pearsall.  In press.  Ecosystem services of Lake Erie:  spatial distribution and concordance of multiple services.  Journal of Great Lakes Research.

Allan, J.D.*, S.D.P. Smith*, P.B. McIntyre, C.A. Joseph, C.E. Dickinson, A.L. Marino, R.G. Biel, J.C. Olson, P.J. Doran, E.S. Rutherford, J.E. Adkins, and A.O. Adeyemo.  2015.  Using cultural ecosystem services to inform restoration priorities in the Laurentian Great Lakes.  Frontiers in Ecology and the Environment 13:  418-424.  (* = equal contributors)

Smith, S.D.P., P.B. McIntyre, B.S. Halpern, R.M. Cooke, A.L. Marino, G.L. Boyer, A. Buchsbaum, G.A. Burton Jr., L.M. Campbell, J.J.H. Ciborowski, P.J. Doran, D.M. Infante, L.B. Johnson, J.G. Read, J.B. Rose, E.S. Rutherford, A.D. Steinman, and J.D. Allan.  2015.  Assessing relative impacts in a multi-stressor world:  expert opinion on 50 stressors to the Laurentian Great Lakes.  Ecological Applications 25:  717-728.

Smith, S.D.P.  2014.  The roles of nitrogen and phosphorus in regulating the dominance of floating and submerged aquatic plants in a field mesocosm experiment.  Aquatic Botany 112:  1-9.

Allan, J.D.*, P.B. McIntyre*, S.D.P. Smith*, B.S. Halpern, G.L. Boyer, A. Buchsbaum, G.A. Burton Jr., L.M. Campbell, W.L. Chadderton, J.J.H. Ciborowski, P.J. Doran, T. Eder, D.M. Infante, L.B. Johnson, C.A. Joseph, A.L. Marino, A. Prusevich, J.G. Read, J.B. Rose, E.S. Rutherford, S.P. Sowa, and A.D. Steinman.  2013.  Joint analysis of stressors and ecosystem services to enhance restoration effectiveness.  Proceedings of the National Academy of Sciences 110:  372-377.  (* = equal contributors)

Smith, S.D.P.  2012.  Identifying and evaluating causes of alternative community states in wetland plant communities.  Oikos 121:  675-686.