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Tidal Wetlands Losses

Since 1989, NYSDEC has been mapping tidal wetlands in the New York Marine District, which includes areas from the Tappan Zee Bridge south, to the southern tip of Staten Island, proceeding east to the twin forks (Montauk and Orient Points) and Fisher's Island.

Generally, tidal wetland losses can result from both human caused and natural disturbances. These may include, but are not limited to, the following:

  • dredging
  • ice scour
  • inlet stabilization
  • watershed development
  • shoreline hardening
  • filling
  • wind/wave action
  • over-enrichment
DEC highlighted the loss of tidal wetlands as a result of nitrogen pollution in a technical briefing: Nitrogen Pollution and Adverse Impacts on Resilient Tidal Marshlands (PDF 246 KB)

A more discrete analysis has been conducted for Nassau and Suffolk Counties on Long Island and Jamaica Bay.

See also a letter from DEC Commissioner Joe Martens regarding repairs and improvements to the Bay Park wastewater treatment plant (PDF) 891 KB and how these will reduce nitrogen discharges into Hempstead Bay, Long Island.


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  • Bureau of Marine Resources
    205 N Belle Meade Road, Suite 1
    East Setauket, NY 11733
    631-444-0465
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  • Page applies to NYS Marine Costal District