New York Natural Heritage Program
Marine Rocky Intertidal
Marine rocky intertidal (close up) with Forbes sea star on Fisher's Island Gregory J. Edinger
System: Marine
SubSystem: Marine Intertidal

State Protection: Not Listed
Federal Protection: Not Listed

State Rarity Rank: S1S2
A State Rarity Rank of S1S2 means: Critically Imperiled or Imperiled in New York - Especially or very vulnerable to disappearing from New York due to rarity or other factors; typically 20 or fewer populations or locations in New York, very few individuals, very restricted range, few remaining acres (or miles of stream), and/or steep declines. More information is needed to assign a single conservation status.

Global Rarity Rank: G5
A Global Rarity Rank of G5 means: Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.


Did you know?
Organisms of marine rocky intertidal environments are adapted to survive under particularly dynamic conditions. The organisms (e.g., algae, sea stars, barnacles, mussels) of this community are exposed to moisture changes, temperature extremes, wave energy, and water salinity changes. For example, as the water recedes during low tide, pools remain in the low spots of the rocky substrate. The organisms that spend low tide within these pools face heat and desiccation stress as the water warms from the sun and evaporates, concentrating the salt levels to a level higher than that of the ocean. Following a heavy rain, however, the water salinity of the tide pools may become close to that of freshwater.

State Ranking Justification [-]
There are probably less than 40 occurrences statewide. A few documented occurrences have good viability, but the level of protection of most occurrences is uncertain. This community has a very limited distribution in the state and is restricted to the portions of the state that have rocky ocean shorelines. There are at least three large, high quality examples (Fishers Island Plum Island, and Montauk Point). The current trend of this community is probably stable in the short term, but may decline slightly in the future due to moderate threats that include alteration of the natural shoreline, invasive species, and sea level rise.

Short-term Trends [-]

Long-term Trends [-]