New York Natural Heritage Program
Cobble Shore
Cobble shore, Delaware River Gregory J. Edinger
System: Terrestrial
SubSystem: Open Uplands

State Protection: Not Listed
Federal Protection: Not Listed

State Rarity Rank: S4
A State Rarity Rank of S4 means: Apparently secure in New York State.

Global Rarity Rank: G4G5
A Global Rarity Rank of G4G5 means: Apparently or Demonstrably Secure globally - Uncommon to common in the world, but not rare; usually widespread, but 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?
Cobble shore communities associated with rivers and streams are particularly dynamic, as they are subject to the seasonal influences of ice scour and flooding. This community type includes both "active" and "stable" cobble shores. Active shores are sites where cobble is loose, moved frequently due to wave and current action. This type of cobble shore is particularly influenced by seasonal hydrologic changes. Stable cobble shores are more densely vegetated with grasses and forbs, but are still subject to periodic disturbance. For this reason, invasive species such Japanese knotweed (Fallopia japonica) and purple loosestrife (Lythrum salicaria) have become extremely abundant at some sites.

State Ranking Justification [-]
There are a couple thousand occurrences statewide. A few documented occurrences have good viability and several are protected on public land or private conservation land. This community is limited to the water bodies with cobble shores in the state, and there are only a few high quality examples. The current trend of this community is probably stable for occurrences on public land, or declining slightly elsewhere due to moderate threats that include alteration to hydrology, shoreline development, instream gravel mining, and invasive species.

Short-term Trends [-]

Long-term Trends [-]