Joseph Ravet


Joseph Ravet

Executive Director Algal Sciences


Dr. Ravet has worked in a diverse group of research laboratories over the last 20 years, ranging from studies in Plant Pathology and Soil Science, to Molecular Biology and Limnology. While at the University of Washington, Joe conducted research on the biochemical basis of algal food quality and taught coursework in Environmental Engineering. He is currently interested in developing new methodologies for incorporating high food quality algae groups into aquaponics farming systems, and producing nutritional food products for human and animal consumption.


  • PhD, Environmental Engineering, University of Washington, 2007
  • MS, Environmental Engineering, University of Washington, 2002
  • Environmental Management Graduate Certificate, University of Washington, 2002
  • BS, Molecular Biology with emphasis on Ecotoxicology, University of Wisconsin, 1998


Postdoctoral Researcher, University of Washington, Marine Biology, 2009- March 2010

Conducted experiments to investigate the potential of using algal feed-stocks to improve
aquaculture production, in collaboration with Professor Rose Ann Cattolico

Postdoctoral Research Associate, University of Washington, Environmental Engineering, 2007 – 2008

Managed NSF funded research project examining the fate and transfer of algal lipids in aquatic ecosystems

Graduate Research and Teaching Assistant, University of Washington, 2000 – 2007

  • Conducted research on mineral/biochemical components of phytoplankton food quality
  • Served as a teaching assistant for junior, senior, and graduate level coursework in Environmental Engineering, including four years of instructing limnology lab aquatic chemistry techniques
  • Published several papers in well respected journals and presented research at several national and international limnology conferences
  • Assisted with writing grant proposals and supervising undergraduate lab projects

Environmental Policy Liaison, Battelle, Pacific Northwest National Lab, 2000 – 2001

Assisted with the development and maintenance of a website designed to provide regulatory information for the chemical process industries (

Laboratory Manager, Department of Soil Science, University of Wisconsin, 1998 – 1999

  • Coordinated graduate student research projects and directed a composting field study
  • Collected soil and biomass samples and conducted physical and chemical analyses
  • Trained and supervised undergraduate lab assistants
  • Managed laboratory space and assisted with data entry, analysis, and presentation

Laboratory Technician, Air and Water Chemistry, Wisconsin State Lab of Hygiene, 1998
Laboratory Assistant, Plant Pathology Department, University of Wisconsin, 1995 – 1998
Laboratory Assistant, Environmental Engineering, University of Wisconsin, 1994 – 1995

Awards and Activities

  • Board of Directors, Washington State Lake Protection Association, 2007 – 2009
  • Workshop facilitator, TA Conference on Teaching and Learning, University of Washington, 2006 and 2007
  • Nancy Weller Memorial Scholarship, Washington State Lake Protection Association, 2005
  • Battelle Research Fellowship, Environmental Policy, Associated Western Universities, 2000

Selected Publications

  • Ravet, J.L., M.T. Brett, and G.B. Arhonditsis. 2010. The effects of seston lipids on zooplankton fatty acid composition in Lake Washington, Washington, USA. Ecology 91(1): 180-190.
  • Ravet, J.L., J. Persson, and M.T. Brett. (Final draft: submitted to Journal of Plankton Research). Dietary threshold concentrations of three polyunsaturated fatty acids for Daphnia somatic growth and reproduction.
  • Persson, J., M.T. Brett, T. Vrede, and J.L. Ravet. 2007. Food quantity and quality regulation of trophic transfer between primary producers and a keystone grazer (Daphnia) in pelagic freshwater food webs. Oikos 116: 1152-1163.
  • Ravet, J.L., and M.T. Brett. 2006. Essential fatty acid and phytoplankton phosphorus content constraints on Daphnia somatic growth and reproduction. Limnology and Oceanography 51: 2438-2452.
  • Brett, M.T., D.C. Muller-Navarra, A.P. Ballantyne, J.L. Ravet, and C.R. Goldman. 2006. Daphnia fatty acid composition reflects that of their diet. Limnology and Oceanography 51: 2428–2437
  • Ravet, J.L., M.T. Brett, D.C. Müller-Navarra. 2003. A test of the role of polyunsaturated fatty acids in phytoplankton food quality for Daphnia using liposome supplementation. Limnology and Oceanography 48: 1938-1947.
  • Cooperband, L.R., A.G. Stone, M.R. Fryda, and J.L. Ravet. 2003. Relating compost measures of stability and maturity to plant growth. Compost Science & Utilization 11: 113-124.

Presentations Given at Conferences

  • Ravet, J.L. et al. “Natural seston impacts on zooplankton fatty acid composition in Lake Washington”. Presented August 13, 2007 in Montréal, Québec, at the 30th Congress of the International Association of Theoretical and Applied Limnology.
  • Ravet, J.L. et al. “Dietary threshold concentrations of three polyunsaturated fatty acids for Daphnia somatic growth and reproduction.” Presented June, 2006 in Victoria, British Columbia, at the American Society of Limnology and Oceanography annual conference.
  • Ravet, J.L. et al. “Essential fatty acid and phytoplankton phosphorus content constraints on Daphnia somatic growth and reproduction.” Presented February, 2003 in Salt Lake City, Utah, at the American Society of Limnology and Oceanography annual conference.
  • Ravet, J.L. et al. “A test of the role of polyunsaturated fatty acids in phytoplankton food quality for Daphnia using liposome supplementation.” Presented June, 2002 in Victoria, British Columbia, at the American Society of Limnology and Oceanography annual conference.

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