Using Fisheries- Focused Ecosystem Models to Assess the Benefits of Chesapeake Bay TMDLs Howard Townsend, Ph.D. Modeling and Analysis Team Lead NOAA Chesapeake Bay Office Tom Ihde, Ph.D. Fisheries/Ecosystem Modeler NOAA Chesapeake Bay Office/Versar, Inc.
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Using Fisheries-Focused Ecosystem Models to Assess the Benefits of Chesapeake Bay TMDLs Howard Townsend, Ph.D. Modeling and Analysis Team Lead NOAA Chesapeake.
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Using Fisheries-Focused Ecosystem Models to Assess the
Benefits of Chesapeake Bay TMDLs
Howard Townsend, Ph.D. Modeling and Analysis Team Lead
NOAA Chesapeake Bay Office
Tom Ihde, Ph.D. Fisheries/Ecosystem Modeler
NOAA Chesapeake Bay Office/Versar, Inc.
ObjectiveTo work collaboratively with EPA water quality
modelers and economists to understand the linkages between Chesapeake Bay water quality and fisheries, so that economists can assess the benefits of TMDL regulations to fisheries production in the Chesapeake.
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Plan to accomplish objectives• For different TMDL scenarios, use nutrient outputs of the EPA
Chesapeake Bay Program Eutrophication Model Suite to drive fisheries-focused ecosystem models: – Chesapeake Atlantis Model (CAM)– Chesapeake Bay Fisheries Ecosystem Model (CBFEM)
• Use ecosystem model outputs – biomass and catch of key species – to inform economic surveys and models
• Work iteratively with economists to provide outputs as needed for different stages of benefits assessment (i.e., focus groups, stated preference surveys, economic models)
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Biological environmentPrimary productionTrophic interactionsRecruitment relationshipsAge structureSize structureLife History