Dave Wedin

Dave Wedin

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Title Ecosystem Ecologist
Address 411 Hardin Hall
3310 Holdrege Street
Lincoln NE
68583-0974
Phone 402-472-9608
FAX 402-472-2946
E-mail dwedin1@unl.edu
Vitae Download file

Hi, I'm David Wedin, professor in plant and ecosystem ecology at the School of Natural Resources.

My research interests include grassland and savanna ecology, carbon and nitrogen cycling in terrestrial ecosystems, biodiversity and ecosystem functioning, landscape ecology and fire ecology. They also include nitrogen-use-efficiency and resource allocation in plants and stable isotope studies of plant-soil feedbacks.

Current research projects in Nebraska include the Sandhills Biocomplexity Project, subtitled "Spatiotemporal coupling of ecological and geological dynamics in the Nebraska Sandhills" and the ecosystem consequences of ponderosa pine establishment in the Nebraska Sandhills at the planted Nebraska National Forest at Halsey.

In the biocomplexity project that I co-lead with two other researchers, 15 total co-investigators from diverse disciplines will use a $1.8 million grant from the National Science Foundation take an integrated approach to studying the dynamics of the Nebraska Sandhills from the last few thousand years to today, particularly the interactions of water, dunes and vegetation as the grass cover is stripped or recovers. The Sandhills are a model system for biocomplexity studies, in particular studies that integrate the perspectives of ecologists and geologists to understand how ecological interactions, geomorphology (landscape structure and development) and climate interact to shape a landscape.

Dave Wedin

Regarding pine establishment in the Sandhills, revisiting in a more sophisticated way notions of landscape influence on climate, near the end of the 20th century, hypotheses that changes in land cover may have significant feedbacks on climate at various scales returned to the fore in ecology and biogeochemistry. The documented site history, relatively uniform soils, and age (70 years on average) of the experimental ponderosa pine plantings at NNF make them uniquely suited to address these issues in the Great Plains.

Before coming to UNL, from 1992 1998, I was an assistant and associate professor in the Department of Botany at the University of Toronto.

I also have chaired the Initiative in Ecological and Evolutionary Analysis Graduate Students Grant Program in spring 2000.

I was a guest instructor in April 1999 for "Interactions between element cycles and ecosystems," a graduate course at Wageningen Agricultural University in The Netherlands. From 1997-2000, I was associate editor of "American Naturalist." In 1997, I was a member of the Ontario Graduate Scholarships Review Panel, and in 1996 I was a member of the Conservation and Restoration Biology Grant Review Panel of the U.S. National Science Foundation.

Selected Publications

Eggemeyer, K.D., T. Awada, D.A. Wedin, F.E. Harvey and X. Zhou. 2006. Ecophysiology of two native invasive woody species and two dominant warm-season grasses in the semiarid grasslands of the Nebraska Sandhills. International Journal of Plant Science. 167:991-999.
Sridhar, V., K.G. Hubbard, and D.A. Wedin. 2006. Assessment of soil moisture dynamics of the Nebraska Sandhills using long-term measurements and a hydrology model. J. of Irrigation and Drainage Engineering. 132:463-473.
Tjoelker, M.G., J.M. Craine, D. Wedin, P.B. Reich and D. Tilman. 2005. Linking leaf and root trait syndromes among 39 grassland and savannah species. New Phytologist, 167:493-508.
Tjoelker, M.G., J.M. Craine, D. Wedin, P.B. Reich and D. Tilman. 2005. Linking leaf and root trait syndromes among 39 grassland and savannah species. New Phytologist, 167:493-508.
Reich, P.B., D. Tilman, S. Naeem, D.S. Ellsworth, J. Knops, J. Craine, D. Wedin, and J. Trost. 2004. Species and functional group diversity independently influence biomass accumulation and its response to CO2 and N. Proceedings of the National Academy of Sciences, (PNAS) 101:10101-10106.
Reich, P.B., D. Tilman, S. Naeem, D.S. Ellsworth, J. Knops, J. Craine, D. Wedin, and J. Trost. 2004. Species and functional group diversity independently influence biomass accumulation and its response to CO2 and N. Proceedings of the National Academy of Sciences, (PNAS) 101:10101-10106.
Sanderson, M.A., R.H. Skinner, D.J. Barker, G.R. Edwards, B.F. Tracy, and D.A. Wedin. 2004. Plant species diversity and management of temperate forage and grazing land ecosystems. Crop Science, 44:1132-1144.
Wedin, D.A. 2004. C4 Grasses: Resource use, ecology and global change. 2004. Pages 15-50 in Moser, L.E., B.L. Burson, and L.E. Sollenberger (ed.) Warm-Season (C4) Grasses. Monograph No. 45. ASA, CSSA, SSSA. Madison, WI.
Craine, J.M., D.A. Wedin, F.S. Chapin and P.B. Reich. 2002. Relationship between the structure of root systems and resource use for 11 North American grassland plants. Plant Ecology 165:85-100.
Craine, J.M., D.A.Wedin, F.S. Chapin III, and P.B.Reich. 2003. The dependence of root system properties on root system biomass of 10 North American grassland species. Plant and Soil, 250:39-47. (UNL ARD #13772).
Craine, J. M., D. A. Wedin, and P. B. Reich. 2001. The response of soil CO2 flux to changes in atmospheric CO2, nitrogen supply, and plant diversity. Global Change Biology7:947-953.
Wedin, D.A. and D. Tilman. 1996. Influence of nitrogen loading and species composition on the carbon balance of grasslands. Science, 274:1720-1723.

Educational Background

  • BS - St. Olaf College, Biology (1981)
  • PhD - University of Minnesota, Ecology (1990)

SNR Faculty Area(s)

Notable Websites

Coordinator - Sandhills Biocomplexity Project, various projects at the Nebraska National Forest (Halsey, NE), ecological studies using stable isotopes.Ecosystem science, forest / grassland ecology, plant-soil interactions, carbon and nitrogen cycling, ecohydrology

Currently this page only displays grants that were awarded on 1/1/2009 to the present. If a grant was awarded prior to 1/1/2009 and is still active, it will not be displayed on this page.

Grant Title Learning from the 2012 Niobrara Fire
Starting Date 6/5/2013
Principal Investigators
Dave Wedin
Co-PIs
Walt Schacht
Twidwell Jr., Dirac
Ending Date 8/31/2015
Funding Level $132,050.00
Funding Source Nature Conservancy

 
Grant Title Methane Uptake by Grassland Soils (additional funding)
Starting Date 4/15/2011
Principal Investigators
Dave Wedin
Ending Date 3/31/2015
Funding Level $13,165.00
Funding Source Colorado State University

 
Grant Title Methane Uptake by Grassland Soils: Biogeochemistry, Microbial Ecology and Integrative Modeling (additional funding)
Starting Date 4/15/2011
Principal Investigators
Dave Wedin
Ending Date 3/31/2015
Funding Level $12,871.00
Funding Source CU

 
Grant Title Methane Uptake by Grassland Soils: Biogeochemistry, Microbial Ecology and Integrative Modeling
Starting Date 4/15/2011
Principal Investigators
Dave Wedin
Ending Date 3/31/2015
Funding Level $12,587.00
Funding Source CU

 

Undergraduate Majors Bachelor of Science in
  • Fisheries & Wildlife
  • Grassland Ecology & Management
  • Pre-Natural Resources
Graduate Program(s)

Master of Science in Natural Resource Sciences


including specializations in
  • Applied Ecology

Doctor of Philosophy in Natural Resource Sciences


including specializations in
  • Applied Ecology

Courses Taught in the Current Semester
Course Number Course Title Day Time Cross Listing
NRES 299B Independent Study: Ecosystems of Northeast Nebraska TBA TBA n/a
Courses Taught
Course Number Course Title Fall Even Years Fall Odd Years Spring Even Years Spring Odd Years Summer Session Cross Listing
NRES 220 Principles of Ecology X X BIOS 220
NRES 222 Ecology Laboratory X X BIOS 222
NRES 424 Forest Ecology X X NRES 824
NRES 824 Forest Ecology X X NRES 424