Vulnerability of oyster aquaculture and restoration to ocean acidification and other co-stressors in the Chesapeake Bay

Marjy Freidrichs (Virginia Institute of Marine Science ), Emily Rivest (Virginia Institute of Marine Science ), David Wrathall (Oregon State University)

Coastal acidification and its associated co-stressors present a serious and credible threat to the success of both oyster aquaculture and restoration in the Chesapeake Bay. Recent research provides a clearer understanding of the physiological sensitivity of different economically and culturally valuable shellfish species to ocean acidification (OA), but we still lack a basic understanding of how vulnerability differs across the range of shellfish-reliant stakeholders, specifically participants in oyster aquaculture, the growers, watermen and coastal restoration managers. This basic knowledge gap motivates this work, which aims to: (1) assess the vulnerability of the oyster aquaculture industry and oyster restoration to OA and other co-stressors, and (2) produce the information required by regional communities to aid in adaptation to these stressors. In achieving these goals, we will better understand which shellfish stakeholders will be able to successfully adapt, which will seek alternative livelihoods, and what specifically causes the difference between these two disparate outcomes.

Monday, December 21, 2020

Assessing vulnerability of the Atlantic Sea Scallop social-ecological system in the northeast waters of the US

Samantha Seidlecki (University of Connecticut), Lisa Colburn (NOAA Northeast Fisheries Science Center), Shannon Meseck (NOAA Northeast Fisheries Science Center)

Of the fisheries made up of calcifiers in the Northeast United States, the Atlantic sea scallop fishery is worth more than $500 million per year, is the second highest fisheries revenue in the United States, and the largest wild scallop fishery in the world. The vulnerability and resilience of fishing communities to the effects of warming and Ocean Acidification (OA) on Northeast species is dependent on their adaptive capacity in relation to both social and environmental exposure and sensitivity factors. Communities that harvest a diversity of species may adapt more easily than communities that specialize in one or a few species. The regional contribution of sea scallop to total regional landed value has steadily increased over recent decades as has fishing community dependence on it as a source of revenue. Prior work projecting impacts to scallops in the region found that sea scallop biomass may decline by more than 50% by the end of the century with a large impact on the fishery (Cooley et al. 2015; Rheuban et al. 2018), but new tools and lab results are available for this proposed work that may alter this assessment. The team is working the hypothesis that a spatially- explicit regional projection of changes relative to sea scallop fishing zones can inform fishery management and allow communities that rely on Atlantic sea scallops to plan and become more resilient to future change. This work will develop a recommendation to management to assist scallop industry stakeholders and managers with changes in the fishery that result from projected OA and temperature changes. 
Monday, December 21, 2020

Vulnerability and Adaptation to Ocean Acidification Among Pacific Northwest Mussel and Oyster Stakeholders

David J. Wrathall, George Waldbusser, and David Kling, Oregon State University

Ocean acidification (OA) is already harming shellfish species in the Pacific Northwest, a global hotspot of OA. While OA poses a threat to regional communities, economies, and cultures that rely on shellfish, identified gaps remain in adaptive capacity and vulnerability of several stakeholders. This project will address these gaps by extending long-standing collaborative OA vulnerability research with shellfish growers to include other shellfish users (e.g. port towns, Native American tribes and shellfish sector employees). The project includes five objectives: 1) Map variations in shellfisheries’ exposure to OA and identify those that are most sensitive, 2) quantify production losses from OA and costs of investment in adaptation 3) Identify potential pathways for adaptation, 4) identify key technological, institutional, legislative, financial and cultural barriers to OA adaptation, 5) evaluate the cost of potential adaptation strategies, and develop behavioral models to predict the likelihood of users adopting specific adaptation strategies. The research is designed to identify key vulnerabilities, determine the cost of OA to Pacific Northwest shellfish stakeholders, and to model adaptation pathways for maximizing resilience to OA. The adaptation framework developed here will be replicable in other shellfisheries yet to experience OA impacts.


Friday, December 22, 2017

The Olympic Coast as a Sentinel: An Integrated Social-Ecological Regional Vulnerability Assessment to Ocean Acidification

Jan Newton, University of Washington

The Olympic Coast, located in the Pacific Northwest U.S., stands as a region already experiencing effects of ocean acidification (OA). This poses risks to marine resources important to the public, especially local Native American tribes who are rooted in this place and depend on marine treaty-protected resources. This project brings together original social science research, synthesis of existing chemical and biological data from open ocean to intertidal areas, and model projections, to assess current and projected Olympic Coast vulnerabilities associated with OA. This critical research aims to increase the tribes’ ability to prepare for and respond to OA through respective community-driven strategies. By constructing a comprehensive, place-based approach to assess OA vulnerability, decision-makers in the Pacific Northwest will be better able to anticipate, evaluate and manage societal risks and impacts of OA. This collaborative project is developed in partnership with tribal co-investigators and regional resource managers from start to finish and is rooted in a focus on local priorities for social, cultural, and ecological health and adaptive capacity.

Friday, December 22, 2017