New York Natural Heritage Program
Brackish Tidal Marsh
Brackish Tidal Marsh S. M. Young
System: Estuarine
SubSystem: Estuarine Intertidal

State Protection: Not Listed
Federal Protection: Not Listed

State Rarity Rank: S3S4
A State Rarity Rank of S3S4 means: Vulnerable in New York, or Apparently Secure - Vulnerable to becoming imperiled in New York, with relatively few populations or locations, few individuals, and/or restricted range; or uncommon but not rare in New York; may be rare in some parts of the state; possibly some cause for long-term concern due to declines or other factors. More information is needed to assign a single conservation status.

Global Rarity Rank: G4
A Global Rarity Rank of G4 means: Apparently secure globally, though it may be quite rare in parts of its range, especially at the periphery.


Did you know?
Brackish tidal marshes are river-associated estuarine environments found upstream from salt marshes. The water salinity values of brackish tidal marshes change frequently due to the tidal influence. Salinities may be similar to freshwater tidal marshes (around .05% or less) at low tide, and similar to the ocean (3% or more) during the highest tide. The species composition of brackish tidal marshes is a combination of species characteristic of salt and freshwater tidal marshes due to this factor. Areas with the highest water salinity values are the least diverse.

State Ranking Justification [-]
There are probably less than a dozen occurrences statewide. A few documented occurrences have good viability and a few are protected on public land or private conservation land. This community is restricted to brackish portions of estuaries in the state, and includes a few moderately sized, good quality examples. The current trend of this community is probably declining slightly due to moderate threats that include alteration of the natural hydrology and invasive species. Reed grass (Phragmites australis ssp. australis) appears to be a particular threat to this community.

Short-term Trends [-]

Long-term Trends [-]