Nutrient Bioextraction Workshop

International Workshop on Bioextractive Technologies for Nutrient Remediation

Sponsored by LISS, NOAA, NEIWPCC, and UCONN

In 2009, the Long Island Sound Study (LISS) brought together an international roster of experts to discuss new and innovative technologies to address the management of eutrophication and hypoxia in the Sound. The workshop explored the potential application of extractive aquaculture technologies of macroalgal and shellfish cultivation for nutrient mitigation in the nearshore estuarine environments of the Sound.  Nutrient bioextraction is defined here as “an environmental management strategy by which nutrients are removed from an aquatic ecosystem through the harvest of enhanced biological production, including the aquaculture of suspension-feeding shellfish or algae.” These emerging technologies would complement existing nutrient source control programs. The workshop program was designed to bring experts in macroalgae and shellfish cultivation, integrated multi-trophic aquaculture (IMTA), resource economics and coastal modeling together with local partners to discuss the potential benefits of these technologies to the Sound and other urban estuarine environments. Goals of the workshop included:

  • Increasing awareness of alternatives for nutrient management on the part of federal/state/municipal agencies and coastal managers;
  • An assessment of the local feasibility of this approach including suggestions for pilot projects and locations;
  • The identification of opportunities for economic incentives for nutrient bioextraction through nitrogen credit trading or other practices.

The workshop was co-sponsored by the Long Island Sound Study, National Oceanic and Atmospheric Administration, New England Interstate Water Pollution Control Commission, and University of Connecticut, and was held at the University of Connecticut’s Stamford Campus.  Over 100 people were in attendance each day.  Participants represented a variety of organizations, including local, state and federal agencies, shellfish growers and industry representatives, academics and non-profits.

The following documents will help you learn more about the Workshop.

Posters & Presentations


Peter Bergstrom, Richard Carey, Sally Hornor, and Chris Judy
Water quality & SAV improved in mesohaline Chesapeake Bay in 2004: Was this due to abundant dark false mussels? (312KB)

Yufeng Yang, Fang Jin & Charles Yarish
Bioremediation of Nutrient Enriched Waters by the Rhodophyte Gracilaria lemaneiformis in China. (2MB)


Bela H. Buck, Alfred Wegener Institute for Polar and Marine Research
The European Experience in the North Sea: from Theory to Reality. (4.6MB)

Alejandro H. Buschmann, University of Los Lagos—Seaweed Use to Mitigate
Aquaculture Induced Eutrophication Processes in Chile. Part 1 (8MB)
Part 2 (5MB)

Stephen F. Cross, University of Victoria
Sustainable Ecological Aquaculture (SEA) Systems: Building a Business Case for Bio-extraction. (6.4MB)

Dale A. Kiefer, University of Southern California; Frank O’Brien & Jack Rensel, System Science Application
Modeling Fish Farm Operations and Impacts. (2MB)

Odd Lindahl, The Royal Swedish Academy of Sciences, Kristineberg Marine Research Station
Bioextraction in Practice: A Case Study for Shellfish Cultivation. (3.8MB)

Hauke Kite-Powell, Marine Policy Center, Woods Hole Oceanographic Institution
Aquatic Carrying Capacity and Economic Considerations for Shellfish Aquaculture. (2.5MB)

Robin Landeck Miller, HydroQual
Applying the System Wide Eutrophication Model (SWEM) for a Preliminary Quantitative Evaluation of Biomass Harvesting as a Nutrient Control Strategy for Long Island Sound. (2MB)

Richard Langan, Director, Coastal and Ocean Technologies Programs, University of New Hampshire
Hypothetical Case Study for Using Extractive Technologies for Meeting Nutrient Criteria Goals for the Great Bay Estuary, New Hampshire. (2MB)

Roger I.E. Newell, Horn Point Laboratory, University of Maryland Center for Environmental Science
The Influence of Eastern Oysters on Ecological Processes in Chesapeake Bay: Insights from Modeling Studies. (1.2MB)

Bob Rheault, Executive Director, East Coast Shellfish Growers Association
Ecosystem Services Provided by Shellfish Aquaculture. (2.2MB)

Kurt Stephenson, Department of Agriculture & Applied Economics, Virginia Tech
The Economics of Nutrient Harvest: Overviews of Alternatives and Challenges to Creating Incentives


For more information, please contact Julie Rose at [email protected].

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