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Levinton jb task force 4 17-2018
- 1. Nitrogen input andhistorical variation of water quality Jeffrey Levinton Ecology and Evolution Dept. Stony Brook University jeffrey.levinton@stonybrook.edu
- 2. Three sections 1 Seasonalvariation of food supply and access of restored oysters to Jamaica Bay primary production by season 2 Historical changes in water quality since 1990 as compared to nitrogen input 3 Fine time-scale spatial correlation of water quality at sites across Jamaica Bay, summer 2015
- 4. Access of restoredoysters to Jamaica Bay primary production
- 5. Water is verticallymixed – little or no stratification 1 m depth 5 m depth 9/2017
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- 7. Oyster Clearance Rate Conclude:oysters don’t have access to the winter-spring bloom
- 8. Part 2 • Historicalchanges in water quality since 1990 as compared to nitrogen input
- 9. Nitrogen input andhistorical variation of water quality Jeffrey Levinton Ecology and Evolution Dept. Stony Brook University FromNixon 1992 Peconic Bay Great South Bay Jamaica Bay Peconic Bay, Bruno, 1983 GSB, Schubel et al. 1991 JB, Wallace, 2012
- 10. History of NInput – Jamaica Bay Courtesy John McLoughlan
- 11. Analysis of stationssampled since 1990 N9A J1A J5
- 12. East – WestWater Quality Gradient
- 13. From Benotti etal. 2009 after data from Hydroqual
- 14. Analysis of stationssampled since 1990 N9A J1A J5
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- 18. Analysis of Covariance– Time Significant, Interaction of Time x Location NS
- 20. Fine scale spatialcorrelation of water quality at sites across Jamaica Bay, summer 2015
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- 22. Four sensors, summer2015 Thanks to Jim Browne for Inwood, Chris Gobler for JFK, Riis Landing, NYC for Broad Channel
- 24. END THANK YOU! QUESTIONS? Thanks: Supportfrom Hudson River Foundation, U.S. National Parks Service, DO Fund
- 25. Oysters have nofeeding access to winter-spring bloom