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Daniel J. Twedt

USGS Patuxent Wildlife Research Center
University of Memphis, South Campus,
Building 8, Room 208
950 Getwell Road, Memphis, TN 38111

Photo of Daniel J. Twedt 

Telephone: 901-327-0174 ext 3

Fax: 901-327-8046

Email: dtwedt@usgs.gov 

Research Wildlife Biologist

Primary Responsibilities: 
As a Principle Investigator, conducts research on forest and grassland birds and their associated habitats. Particularly with regard to the effects of forest restoration and management on birds. 

Education/Training: 
Ph.D., North Dakota State University, Zoology, 1990
M.S., North Dakota State University, Applied Statistics, 1990
M.S., Western Kentucky University, Biology, 1982
B.A., North Dakota State University, Biology, 1977

Areas of Expertise/Interest: Ecology of forest and grassland birds, particularly the impact of forest management practices, forest restoration methods, and landscape context.  Evaluating assumptions used by Partners-In-Flight for avian conservation planning in the Mississippi Alluvial Valley.
Accomplishments/Awards/Achievements: 
Scientific Achievement Award, USGS, 2006
Certified Senior Ecologist (Ecological Society of America), 2005
Partners in Flight Investigations Award, 2002
Associate Editor – American Midland Naturalist, 1999 – 2002
Co-chair Partners-in-Flight Mississippi Valley Bird Conservation Region, 1998 – 2002
Certified Wildlife Biologist (The Wildlife Society), 2000
Citation for Outstanding Contribution to Partners-in-Flight, 1998
Citation for Outstanding Performance, USFWS, 1979, 1985, & 1992
Special Achievement Award, USFWS, USDA, 1979, 1985

Active Projects: 

Enhancement of hardwood plantation diversity by incorporation of mast-producing trees.

Impact of placement of bottomland hardwood forest restoration on avian demography.

Bird Use of Silvicultural Treatments Prescribed to Enhance Avian Habitat on Tensas River NWR.

Estimating Survival of Breeding Birds in a Bottomland Hardwood Forest.

Methodological Framework for Ecoregional Scale Landbird Conservation Planning in Forested Biomes.

Publications/Products: 

King, S.L., D.J. Twedt and R.R. Wilson. 2006. The role of the Wetland Reserve Program in conservation efforts in the Mississippi Alluvial Valley. Wildlife Society Bulletin 34:914-920.

Somershoe, S. G., D. J. Twedt, and B. Reid.  2006.  Combining breeding bird survey and distance sampling to estimate density of migrant and breeding birds.  Condor 108:691-699.  

Twedt, D. J.  2006.  Direct seeding woody species for restoration of bottomlands.  Pages 212 – 217 in K. Conner, editor.  Proceedings of the Thirteenth Biennial Southern Silvicultural Research Conference, 1– 4 March 2005, Memphis, TN, U.S. Forest Service, General Technical Report SRS-GTR– 92, Asheville, NC.

Twedt, D. J.  2006.  Small clusters of fast-growing trees enhance forest structure on restored bottomland sites.  Restoration Ecology 14:316– 320.

Twedt, D. J., W. B. Uihlein, III, and A. B. Elliott. 2006.  Habitat restoration for forest bird conservation: A spatially explicit decision support model. Conservation Biology 20:100-110. 

Twedt, D. J. and R. J. Cooper.  2005.  Bird Use of Reforestation Sites: Influence of Location and Vertical Structure.  U. S. Department of Agriculture, Natural Resources Conservation Service Technical Note 190–34:1-7.

Twedt, D. J.  2005.  An objective method to determine an area’s relative value for avian conservation.  Pages 71 – 77 in Ralph, C. J. and T. D. Rich (eds.), Bird conservation implementation and integration in the Americas: Proceedings of the Third International Partners in Flight Conference, 2002 March 20-24, Asilomar, CA, U.S. Forest Service, General Technical Report PSW-GTR-191

Wilson, R. R. and D. J. Twedt.  2005.  Bottomland Hardwood Establishment and Avian Colonization of Reforested Sites in the Mississippi Alluvial Valley.  Pages 341-352 in L. H. Fredrickson, S. L. King, and R. M. Kaminski, editors, Ecology and Management of Bottomland Hardwood Systems: The State of Our Understanding.  University of Missouri-Columbia. Gaylord Memorial Laboratory Special Publication No. 10, Puxico.

Twedt, D. J.  2004.  Sex Determination of Carolina Wrens (Thryothorus ludovicianus) in the Mississippi Alluvial Valley.  North American Bird Bander  29:171-174.

Twedt, D. J. 2004.  Stand development on reforested bottomlands in the Mississippi Alluvial Valley.  Plant Ecology 172:251-263.

Twedt, D. J. and C. Best.  2004.  Restoration of Floodplain Forests for the Conservation of Migratory Landbirds.  Ecological Restoration 22:194-203.

Twedt, D. J., R. R. Wilson, J. L. Henne-Kerr, and D. A. Grosshuesch.  2002.  Avian response to bottomland hardwood reforestation: The first 10 years.  Restoration Ecology 10:645-655.

Twedt, D. J., R. R. Wilson, J. L. Henne-Kerr, and R. B. Hamilton.  2001.  Nest survival of forest birds in the Mississippi Alluvial Valley.  Journal of Wildlife Management 65:450-460.

Twedt, D. J., R. R. Wilson, J. Henne-Kerr, and R. B. Hamilton.  1999.  Impact of Bottomland Hardwood Forest Management on Avian Densities.  Forest Ecology and Management 123:261–274. 

Twedt, D. J. and C. R. Loesch.  1999.  Forest Area and Distribution in the Mississippi Alluvial Valley:  Implications for Breeding Bird Conservation.  Journal of Biogeography 26:1215–1224.

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