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Jbtf oyster presentation

  1. 1. Expansion of Oyster Pilot Study within Jamaica Bay John McLaughlin October 15, 2014 Jamaica Bay Task Force
  2. 2. 2 Jamaica Bay Watershed Protection Plan • Original Watershed Protection Plan identified 127 Strategies intended to improve water quality, ecology and public access to the bay • 2014 Update released on October 1st • http://www.nyc.gov/html/dep/p df/jamaica_bay/jbwpp_update _10012014.pdf
  3. 3. Original and Expanded Oyster Pilot Locations 3 Oysters Eelgrass Oyster Project Scale-up under DOI Grant
  4. 4. 4 Project Goals GOALS: • Demonstrate effectiveness of water quality and ecological benefits from oyster habitats • Demonstrate effectiveness of safeguards to avoid “attractive nuisance” • Develop information to restore a significant habitat type that once thrived in Jamaica Bay o Measure growth o Survival o Reproduction and Recruitment Under real environmental conditions (e.g., predators, environmental stressors)
  5. 5. 5 Dubos Point Dubos Point - Reef Bed  10’ X 15” near-shore  Spat on Shell (SOS) over surf clam shell  2 feet off bottom at 4 foot MLW
  6. 6. 6 Gerritsen Creek Gerritsen Creek - Reef Balls  12 reef balls placed together  2.5 ft width x 1.75 ft height  Spatted in separate tank (CCE)  Near shore, on bottom at 5 foot MLW
  7. 7. 7 Pilot Conclusions  Generally adequate conditions for life functions  Extensive predation observed (drills & crabs)  Percent survival > on reef balls vs. reef bed  Low incidence of Disease  Growth rates comparable to east coast estuaries  Gonadal development found  Reproduction not directly observed  No recruitment observed
  8. 8. 8 Oyster Growth DP & GC 2012 avr & max shell height
  9. 9. Improved Habitat Baseline 6 months Post Construction 12 months Post Construction 9 Frequently Observed Macrobenthic Species
  10. 10. 10 Lessons Learned  Scale  Although provided, difficult to actually measure water quality improvements - made more difficult due to small scale  No buffering capacity from disturbances  Reef Balls very successful  Reef Bed not stable  Requires lower energy, greater depth and/or structural protection
  11. 11. 11 Oyster Pilot Expansion • Building on the research already done, the expansion will create a functional oyster spat “donor” bed and four smaller oyster “receiving beds” to ultimately determine whether or not oyster restoration can be self-sustaining within Jamaica Bay. • Based on oyster larval modeling results (Fitzpatrick, 2012), modeling suggests that Head of Bay provides a greater potential degree of larva retention. • A larger oyster bed would also provide a greater degree of resilience to disease and predation. Received $1M in funding from the Department of Interior Hurricane Sandy Coastal Resiliency Grant Program and $375K from DEP
  12. 12. 12 Location of Larva Release Points Slide credit: HDR
  13. 13. 13 Recruitment Results Spat Release Locations near Head of Bay Slide credit: HDR
  14. 14. 14
  15. 15. Partners 15 Design/Installation • New York Harbor School • Cornell University Cooperative Extension • Hudson River Foundation Permitting • NYSDEC • USACE
  16. 16. 16 Thank You John Mclaughlin NYCDEP 718-595-4458 jmclaughlin@dep.nyc.gov www.nyc.gov.dep

Editor's Notes

  • Sites subject to different environmental conditions, salinities, temperature
    Two sites: Different salinities & treatments
    Both easy access for bi-weekly monitoring

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