Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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Dan Uden

Research Publications

  • Streit Krug, A., D. R. Uden, C. R. Allen, and D. Twidwell. 2017. Culturally induced range infilling of eastern redcedar: a problem in ecology, an ecological problem, or both?.
    Ecology and Society 22(2):46.
  • Allen, C.R., H.E. Birge, S.L. Bartelt-Hunt, R.A. Bevans, J.L. Burnett, B.A. Cosens, X Cai, A.S. Garmestani, I. Linkov, E.A. Scott, M.D. Solomon and D.R. Uden. 2016. Avoiding
    decline: Fostering resilience and sustainability in midsize cities. Sustainability 8: 844-868.

  • Allen, C.R., D.G. Angeler, G.S. Cumming, C. Folke, D. Twidwell, and D. Uden. 2016. Quantifying spatial resilience. Journal of Applied Ecology 53: 625-635.
  • Uden, D.R., C.R. Allen, A.A. Bishop, R. Grosse, C.F. Jorgensen, T.G. LaGrange, R.G. Stutheit, and M.P. Vrtiska. 2015. Predictions of future ephemeral wetland habitat availability for the continued management of North American waterbirds under global change. Ecosphere 6:art215.
  • Uden, D.R., C.R. Allen, D.G. Angeler, L.Corral and K.A. Fricke. 2015. Adaptive invasive species distribution models: A framework for modeling incipient invasions. Biological Invasions 10: 2831-2850.
  • Uden, D.R., C.R. Allen, T.D. McCoy, R. B. Mitchell and Q. Guan. 2015. Predicted avian responses to scenarios of biofuel-based landuse change in an intensive agricultural landscape. Global Change Biology – Bioenergy 7: 717-726.
  • Angeler, D.G., C.R. Allen, D.R. Uden, and R.K. Johnson. 2015. Spatial scaling patterns and functional redundancies in a changing boreal lake landscape.
    Ecosystems 18:889-902.
  • Uden, D. R., M. L. Hellman, D.G. Angeler, and C. R. Allen. The role of reserves
    and anthropogenic elements for functional connectivity and resilience of ephemeral
    habitats. Ecological Applications 24:1569-1582.
  • Stephen, B. J., C. R. Allen, N. M. Chaine, K. A. Fricke, D. M. Haak, M. L. Hellman, R. A. Kill, K. T. Nemec, K. L. Pope, N. A. Smeenk, D. R. Uden, K. M. Unstad, A. E. VanderHam, and A. Wong. 2013. Fecundity of the Chinese mystery snail in a Nebraska reservoir. Journal of Freshwater Ecology 28:439-444. Download  | 
  • Unstad, K. M., D. R. Uden, C. R. Allen, N. M. Chaine, D. M. Haak, R. A. Kill, K. L. Pope, B. J. Stephen, and A. Wong. 2013. Survival and behavior of Chinese mystery snails (Bellamya chinensis) in response to simulated water body drawdowns and extended air exposure. Management of Biological Invasions 4:123-127. Download  | 
  • Daniel R. Uden, R. B. Mitchell, C. R. Allen, Qingfeng Guan and Tim D. McCoy. The feasibility of producing adequate feedstock for year–round cellulosic ethanol production in an intensive agricultural fuelshed. Bioenergy Research 6: 930-938.
  • Wong, A., C. R. Allen, N. M. Chaine, D. M. Haak, K. L. Pope, N. A. Smeenk, B. J. Stephen, and D. R. Uden. 2013. Enamel-based mark performance for marking Chinese mystery snail Bellamya chinensis. Management of Biological Invasions 4:231-234. Download  | 
  • Uden, D.R., C.R. Allen, R.B. Mitchell, Q. Guan and T.D. McCoy. Bioenergy feedstock development scenarios and potential impacts on regional groundwater withdrawals. Journal of Soil and Water Conservation 68(5):124A-128A.
  • Chaine, N. M., C. R. Allen, K. A. Fricke, D. M. Haak, M. L. Hellman, R. A. Kill, K. T. Nemec, K. L. Pope, N. A. Smeenk, B. J. Stephen, D. R. Uden, K. M. Unstad, and A. E. VanderHam. 2012. Population estimate of Chinese mystery snail (Bellamya chinensis) in a Nebraska reservoir. BioInvasions Records 1:283-287. Download  | 

Current Staff

Federal Staff: 102

Masters Students: 247

Phd Students: 163

Post Docs: 55

University Staff: 266

5 Year Summary

Students graduated: 722

Scientific Publications: 1960

Presentations: 4355


Contact Us

Cooperative Research Units Program Headquarters Reston, VA 20192 Phone: (703) 648 - 4260 Fax: (703) 648 - 4269 Our University Web Site


John Organ
CRU Chief John Organ processing a Canada lynx kitten during a long term research collaboration between the Maine Department of Inland Fisheries and Wildlife and the Fish and Wildlife Service.

John F. Organ is the Chief of the U.S.G.S. Cooperative Fish and Wildlife Research Units. He was Chief of Wildlife and Sport Fish Restoration for the Northeast Region of the U.S. Fish and Wildlife Service from 2005 to 2014, and worked in the FWS’s Ecological Services and National Wildlife Refuge programs during his 35 year career. He is also an Adjunct Associate Professor of Wildlife Conservation at the University of Massachusetts, Amherst, Michigan State University, and Andres Bello University in Santiago, Chile. He is a certified Wildlife Biologist and Past President and Fellow of The Wildlife Society. He is also a Professional Member of the Boone and Crockett Club and a Senior Specialist in the Fulbright Scholar Program. He is a member of the IUCN Otter Specialist and Sustainable Use and Livelihoods Groups, and an instructor and Advisory Board member of the Conservation Leaders for Tomorrow Program. He is also a consultant to the Peru Forest Sector Initiative where he is assisting the Peruvian government in training biologists and developing wildlife regulations. He advises M.S. and Ph.D. students studying carnivores and human dimensions in Africa, Canada, Chile, and the U.S. and teaches graduate courses in Wildlife Management and Conservation and Human Dimensions of Wildlife Conservation.


  1. U.S. Geological Survey
  2. U.S. Geological Survey - Ecosystems
  3. U.S. Department of the Interior

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