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Danielle Kreeger Angela Padeletti Partnership for the DE Estuary

Restoration Aquaculture as a Tool for rebuilding Native Bivalve Assemblages and Ecosystem Services: Watershed Perspectives. Danielle Kreeger Angela Padeletti Partnership for the DE Estuary. 11 Other Species of Freshwater Unionid Mussels. Corbicula fluminea. Elliptio complanata.

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Danielle Kreeger Angela Padeletti Partnership for the DE Estuary

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  1. Restoration Aquaculture as a Tool for rebuilding Native Bivalve Assemblages and Ecosystem Services: Watershed Perspectives Danielle Kreeger Angela Padeletti Partnership for the DE Estuary

  2. 11 Other Species of Freshwater Unionid Mussels Corbicula fluminea Elliptio complanata Rangia cuneata Mya arenaria Geukensia demissa Mytilus edulis Ensis directus Mercenaria mercenaria Crassostrea virginica Bivalves of the Delaware DRBC

  3. Oyster landings in Delaware Bay: 1880 - 1980s http://www.epodunk.com/cgi-bin/genInfo.php?locIndex=25475 Bivalves Oyster Trends

  4. Salt Line Location Oyster Disease and Salinity From Rutgers HSRL From DRBC www.livingclassrooms.org/lbo/dermo/oyster2.jpg

  5. No Help With Help Oyster ManagementCan they maintain (or be maintained) until they might see more optimal conditions? DK 5 Longer Growing Season Options? Shellplanting 2 Recruitment Events Intertidal Niche Expansion? Point of No Return Today 2030 2060 Historical data from Rutgers Haskin Shellfish Laboratory

  6. Geukensia demissa Salt Marshes

  7. Ecosystem Engineers

  8. Mussel – Spartina Mutualism Kathy Klein

  9. Bivalves Freshwater Mussel Status and Trends Ortmann, A.E. 1919. A monograph of the naiades of Pennsylvania. Part III: Systematic account of the genera and species. Memoirs of the Carnegie Museum 8(1):

  10. NEP Study Area Patchy, Impaired Rare Extirpated

  11. Brandywine River, PA Elliptio complanata Delaware Estuary Marshes Geukensia demissa Delaware Bay Oysters Crassostrea virginica Brandywine River, PA DK 15

  12. Climate Change Vulnerability? Oyster Reefs • Salinity Driven Disease Epizootics • Others: Food, pH Salt marsh Mussel Beds • Loss and Degradation of Wetland Habitat • Others: Food, PH Freshwater Mussel Beds • Range Shifts with No Dispersal • Habitat Degradation (T, salinity, pH, fish hosts)

  13. The Decline Biodiversity PopulationBiomass

  14. Nature’s Benefits Bivalve Shellfish are “Ecosystem Engineers” CTUIR Freshwater Mussel Project DK 18

  15. Loss of Ecological Services 1. Structure  Habitat Complexity  Binding of Bottom  Bottom Turbulence 2. Function Suspended Particulates  Particulate N, P  Light  Sediment Enrichment  Dissolved Nutrients

  16. Biofiltration Potential Start No mussels 8 adult mussels Slide from Dick Neves, VA Tech

  17. Biofiltration Potential Later No mussels 8 adult mussels Slide from Dick Neves, VA Tech

  18. Restoration of Nature’s Benefits?

  19. Nature’s Benefits (Natural Capital) Livelihoods Lives Health Livelihoods Health

  20. Desired Watershed Condition:A diverse and robust assemblage of native bivalves living in abundance in all available tidal and non-tidal ecological niches and providing maximum possible natural benefits. DRBC

  21. Freshwater Mussel Recovery Program

  22. Captive Care, Propagation and Reintroduction Cheyney Hatchery

  23. Propagation and Reintroduction Propagated Juveniles Photos, R. Neves, VA Tech

  24. Freshwater Mussel Recovery Program Goals Based on Ecosystem Services Not including progeny

  25. But Be Strategic…. Oyster Reefs • Salinity Driven Disease Epizootics • Others: Food, pH Salt marsh Mussel Beds • Loss and Degradation of Wetland Habitat • Others: Food, PH Freshwater Mussel Beds • Range Shifts with No Dispersal • Habitat Degradation (T, salinity, pH, fish hosts)

  26. Patchy, Impaired Extirpated Rare Strophitus undulatus Elliptio complanata Alasmidonta heterodon Shifts in Species Ranges of Freshwater Mussels Tough Decisions Which species and associated benefits can be sustained? Which should we invest in? (since funding will always be limited)     

  27. And Opportunistic…. Intertidal Oysters ? Salvage and Reuse Eroded Ribbed Mussels? Relocate FW Mussel Broodstock ?

  28. Summary • Both freshwater and marine bivalves • provide multiple goods and services • Bivalves represent excellent targets • for ecosystem-based management, • conservation and restoration • Restoration oriented aquaculture • can play a vital role as part of a • watershed-based bivalve • restoration strategy DRBC

  29. - End - www.DelawareEstuary.org

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