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Dan Magoulick

Dr. Dan Magoulick above Buffalo River, AR


  • Ph D University of Pittsburgh 1994
  • MS Eastern Michigan University 1985
  • BS Michigan State University 1981


Dan joined the Arkansas Cooperative Fish and Wildlife Research Unit in 2000, where he is the Assistant Unit Leader and Professor in the Department of Biological Sciences.

Research Interests

My research has focused on factors affecting population and community dynamics of freshwater fish and invertebrates, especially the role of disturbance in community dynamics, impacts of introduced species in aquatic ecosystems, and aquatic ecosystem conservation. My recent research includes studying, 1) classification of Arkansas flow regimes and developing ecological-flow response relationships and environmental flows assessment for the Ozark region, 2) factors affecting distribution and abundance of the endangered yellowcheek darter, 3) distribution, population genetics and factors affecting imperiled coldwater crayfish, 4) effects of drought and episodic drying on stream fish and invertebrate population and community dynamics, 5) effects of stream drying on fish and invertebrate refuge use and species persistence, 6) models to forecast effects of potential climate change scenarios on fish refuge use and species persistence, 7) influence of drying on fish and crayfish consumers and how they in turn affect stream ecosystem structure and function, 8) the relationship between land use, flow regime, habitat complexity and fish assemblage structure, 9) the potential spread of invasive species and mechanisms of displacement on native species, 10) the influence of abiotic and biotic factors on habitat selection by stream fish and crayfish, and 11) the effect of catch and release areas on movement and mortality of resident rainbow and brown trout in cold tailwater rivers and the relationship between forage base and trout production in these special regulation areas. As part of this work, I attempt to bridge the gap between studies done at small spatial scales and the larger spatial scales necessary to understand how disturbance and movement affect population and community dynamics in stream ecosystems. These projects and related work are carried out using a combination of observation, experimentation in the field and lab, and modeling approaches.

Teaching Interests

I teach Biometry, Fish Ecology and Conservation Biology. I also teach seminars in current topics in Ecology, Conservation Biology and Fisheries.

Professional Society Service

  • American Institute of Fishery Research Biologists - Member, Best Student Paper Award committee (June 2007 - August 2007)
  • American Fisheries Society - Member, Best Paper Award Committee, Transactions of the American Fisheries Society (March 2006 - May 2006)
  • American Fisheries Society - Member, Best Paper Award Committee, Transactions of the American Fisheries Society (March 2003 - May 2003)

Research Publications

  • Middaugh, C.R. and D.D. Magoulick. 2018. Forecasting effects of angler harvest and climate change on smallmouth bass abundance at the southern edge of their range. PLoS ONE 13(8) DOI:e0202737. pone.0202737
  • Lynch, D.T., D.R. Leasure and D.D. Magoulick. 2018. The influence of drought on flow-ecology relationships in Ozark Highland streams. Freshwater Biology 63:946–968. DOI:10.1111/fwb.13089
  • Yarra, A.N. and D.D. Magoulick. 2018. Stream permanence is related to crayfish occupancy and abundance in the Ozark Highlands, USA. Freshwater Science 37:54–63. DOI:10.1086/696020
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Current Projects

Completed Projects


  • Biometry (2018)
  • Introduction to R (2017)
  • Biometry: Experimental design and data analysis for Biologists (2016)
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Arkansas Other Professional Positions and Memberships

  • Dan MagoulickRGE panel (January 2018 - May 2018)
  • Dan MagoulickInter-agency Climate Change Working Group (July 2010 - July 2015)
  • Dan MagoulickOrganizer of special session on “Environmental flows: What, why and how?” at 2014 Arkansas Water Resources Conference. (March 2014 - July 2014)
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Arkansas University Committees and Workgroups

  • Dan MagoulickInvertebrate Ecologist search committee (September 2015 - May 2016)
  • Dan MagoulickAquatic Ecologist search committee (September 2014 - May 2015)
  • Dan MagoulickMember, Ecologist serach committee, Department of Biological Sciences, University of Arkansas. (October 2011 - May 2012)
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Technical Publications

  • Leasure, D.R. and L.A. Bruckerhoff. 2016. Quantification of hydrologic alteration and relationships to biota in Arkansas streams: Development of tools and approaches for un-gaged streams. Final Report prepared for the State Wildlife Grant program of the Arkansas Game and Fish Commission, Little Rock, Arkansas.
  • Nolen, M. and D.D. Magoulick. 2011. The Imperiled Coldwater Crayfish (Orconectes eupunctus) in the Black River Drainage of Missouri and Arkansas: Distribution, Population Genetics and Factors Affecting Distribution and Decline. Annual Report, MDC Account 8104; WPI 720. Fiscal Year 2011, Columbia, Missouri.
  • Larson, E.R. and D.D. Magoulick. 2007. Effects of the introduced crayfish Orconectes ngelectus on a native crayfish Orconectes eupunctus in an Ozark stream system. Final Report prepared for the Arkansas Game and Fish Commission, Little Rock, Arkansas.
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Current Staff

Federal Staff: 2

Masters Students: 1

Phd Students: 4

Post Docs: 1

University Staff: 1

5 Year Summary

Students graduated: 17

Scientific Publications: 30

Presentations: 58

Arkansas Cooperative Fish and Wildlife Research Unit Cooperators

  1. Arkansas Game and Fish Commission
  2. U.S. Fish and Wildlife Service
  3. U.S. Geological Survey
  4. University of Arkansas
  5. Wildlife Management Institute