New York Natural Heritage Program
Freshwater Intertidal Shore
Freshwater intertidal shore Timothy G. Howard
System: Estuarine
SubSystem: Estuarine Intertidal

State Protection: Not Listed
Federal Protection: Not Listed

State Rarity Rank: S2S3
A State Rarity Rank of S2S3 means: Imperiled or Vulnerable in New York - Very vulnerable to disappearing from New York, or vulnerable to becoming imperiled in New York, due to rarity or other factors; typically 6 to 80 populations or locations in New York, few individuals, restricted range, few remaining acres (or miles of stream), and/or recent and widespread declines. More information is needed to assign a single conservation status.

Global Rarity Rank: G3G4
A Global Rarity Rank of G3G4 means: Vulnerable globally, or Apparently Secure -- At moderate risk of extinction, with relatively few populations or locations in the world, few individuals, and/or restricted range; or uncommon but not rare globally; may be rare in some parts of its range; possibly some cause for long-term concern due to declines or other factors. More information is needed to assign a single conservation status.


Did you know?
Bank erosion along freshwater intertidal shores can increase sedimentation and turbidity, which decreases the light availabilty to underwater plants and animals. Placing hard structures like bulkheads or rip-rap along developed shorelines to prevent erosion can destroy wetlands and actually increase erosion on adjacent shorelines. While these structures may be necessary along high energy shorelines, alternatives such as marsh restoration are effective, less expensive options. Retaining or restoring marshes lessens the effects of erosion, reduces pollutants entering the water, enhances fisheries near the property, and creates a more attractive setting.

State Ranking Justification [-]
There are estimated to be less than 20 occurrences in the state, and probably not many more in the northeast. This small, narrow-band community is restricted to the freshwater portion of tidal rivers where the substrate is rocky or gravelly. There are less than 10 occcurrences currently documented by New York Natural Heritage and they are limited to Columbia, Green, Dutchess, and Ulster Counties.Given their location at the tidal-upland interface, several of these occurrences are threatened by shoreline development and invasive plants.

Short-term Trends [-]

Long-term Trends [-]