Ocean Acidification & Harmful Algal Blooms: Defining a Research Agenda

A virtual workshop August 11-13th, 2020

Hosted by NOAA's National Centers for Coastal Ocean Science and Ocean Acidification Program

During June and July a webinar series set the foundation for the workshop - a recording of all of the presentations can be found below!

Contact elizabeth.turner@noaa.gov with any questions about the workshop or webinars!


This workshop aimed to determine a few tractable OA-HAB research priorities for potential  inclusion in an upcoming RFP during our time together by identifying:  

  • gaps in OA-HAB research; and
  • potential useful research products that incorporate OA-HAB interactions

  • view AGENDA 



    June 17th                          2pmET

                               June 24th  1:30pmET     

    June 26th    1:00pmET


    June 29th  1:00pmET


      July 8th           1:00pmET

                                            July 10th   1::30pmET

                                    July 13th    2:00pmET

      July 15th    2:00pmET


    Chris Gobler, Stonybrook University

    Raphe Kudela, University of California Santa Cruz

    Hans Paerl, University of North Carolina

    Clarissa Anderson, University of California San Diego; Samantha Siedlecki, University of Connecticut; Jan Newton University of Washington

    Beth Stauffer, University of Louisiana

    Regan Errera, Great Lakes Environmental Research Laboratory

    Melissa McCutcheon, Texas A&M Corpus Christi\

    Kris Holderied, NOAA National Centers for Coastal Ocean Science


    HABs and ocean acidification: Additive, synergistic, antagonistic, or otherwise?

    Synergies Between OAH and HAB Networks: California as a Case Study

    Acidification, eutrophication and HABs in estuarine waters:  What do long-term data tell us?

    Modeling and Forecasting OA and HABs to meet stakeholders needs – Regional Perspectives                                                                                                                                                                                                                                                                                                                                                                    

    A marginal sea of variability in ocean acidification and harmful algal blooms in the Gulf of Mexico

    Acidification and Harmful Algal Blooms in the Great Lakes                                                                  

                                                                                                 Effects of Ocean Acidification on HABs: A review of what we do and don't know

    Alaska Acidification and HABs: Networking and coastal variability


    Acidification and Harmful Algal Blooms in the Great Lakes

    Friday, July 10, 2020

    Acidification and Harmful Algal Blooms in the Great Lakes
    The Great Lakes are the largest freshwater system on Earth, holding 20 percent of the world’s surface freshwater. Ecosystem services provided by the Great Lakes are vulnerable to a variety of stressors, including harmful algal blooms, eutrophication and oligotrophication, invasive species, contaminants, and changing climate. Acidification within the Great Lakes, as with oceanic systems, is projected to decline in response to increasing atmospheric pCO2.  Ongoing acidification will increase the availability of inorganic carbon within the aquatic system and could reduce stress and energy cost of carbon uptake for certain phytoplankton species, potentially shifting the availability of carbon to favor of one type of algae over the other. In addition, the region is experiencing a rise in aquatic temperatures leading to changes in lake stability.  Thus, the concomitant impact of both temperature and  pCO2 availability may additionally stress the Great Lake's system, potentially driving changes in community dynamics.  In the Great Lakes ecosystem, cyanobacterial HABs (cHABs) have been a recurrent feature since mid-1990s and elevated pCO2 can contribute to the dominance of cyanobacteria within freshwater phytoplankton assemblages. The predominant cHAB is Microcystis aeruginosa, which produces expansive blooms in western Lake Erie and Lake Huron (Saginaw Bay). However, the Great Lakes are impacted by a suite of additional species, including Cylindrospermopsis, Planktothrix, and Cladophora.  Due to the multi-faceted nature of the carbonate system, impacts or potential shifts to phytoplankton species composition and abundance are unknown, however, individual phytoplankton assemblages will likely have unique responses.  Currently, little research has been conducted on inorganic carbon availability, acidification, and their role in phytoplankton dynamics within the Great Lakes ecosystem.  I present a general overview of the current state of knowledge and provide an update on current acidification research activities at NOAA’s Great Lakes Environmental Research Laboratory.

    View the recording and complete this questionnaire after viewing.
    View the recording and complete this questionnaire after viewing.

    Categories: HAB_OA_Workshop |  Tags:

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