New York Natural Heritage Program
Perched Bog
Perched bog at Gadway Sandstone Pavement Barrens. Gregory J. Edinger
System: Palustrine
SubSystem: Open Peatlands

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: 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?
Perched bogs are named because they occur in depressions and valleys where a perched water table is present. A perched water table is groundwater that is separated from the main groundwater table below it by an impermeable layer. Since this water is supplied by a shallow perched water table, perched bogs have lower pH values, lower specific conductivity, lower minerals, lower nutrients, and lower biodiversity than non-perched bogs.

State Ranking Justification [-]
There are very few occurrences of perched bogs statewide. Perched bogs are usually too small to be protected by the New York State freshwater wetland regulations. A few documented occurrences have good viability and are protected on public land or private conservation land. This community has limited statewide distribution and tends to be embedded within barrens or rocky summits that depend on fire to maintain an open habitat. The current trend of this community is probably stable for occurrences on public land, or declining slightly elsewhere due to moderate threats related to development pressure, alteration to the natural hydrology, reduced protection regulations for isolated wetlands, and perhaps fire suppression. This community has declined moderately from historical numbers likely correlated with mining, logging, and development of the surrounding landscape.

Short-term Trends [-]

Long-term Trends [-]