New York Natural Heritage Program
Freshwater Intertidal Mudflats
Freshwater intertidal mudflats Stephen M. Young
System: Estuarine
SubSystem: Estuarine Intertidal

State Protection: Not Listed
Federal Protection: Not Listed

State Rarity Rank: S2
A State Rarity Rank of S2 means: Typically 6 to 20 occurrences, few remaining individuals, acres, or miles of stream, or factors demonstrably make it very vulnerable in New York State.

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?
Freshwater intertidal mudflats are characterized by low-growing rosette-leaved aquatics that are adapted to the tides that flush the community daily. At low tide, the community and rosette-leaved plants are exposed. At high tide, they are completely submerged in three to four feet of water.

State Ranking Justification [-]
This community is restricted to the freshwater portion of tidal rivers. All occurrences are on the Hudson River with about 90% in Greene, Columbia, and Dutchess Counties. There are estimated to be less than 100 occurrences in the state. Several of these occurrences are threatened because of shoreline development, invasive plants, and river channel dredging.

Short-term Trends [-]

Long-term Trends [-]