New York Natural Heritage Program
Riverside Sand/Gravel Bar
Riverside sand/gravel bar at Peakville Stephen M. Young
System: Terrestrial
SubSystem: Open Uplands

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: 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?
Riverside sand and gravel bars provide favorable habitat for certain rare plants, such as swordleaf rush (Juncus ensifolius), dwarf bulrush (Lipocarpha micrantha), Carey's smartweed (Persicaria careyi), and low sand cherry (Prunus pumila var. depressa). However, these habitats are subject to multiple natural and human disturbances, making them particularly vulnerable to invasion by exotic plant species, such as Japanese knotweed (Fallopia japonica) and purple loosestrife (Lythrum salicaria). Ice scour and spring flooding from snow melt are natural processes that contribute to the dynamic nature of the plant communities and the substrate of riverside sand and gravel bars. In addition, artificial water-level fluctuation through the regulation of dams and reservoirs can influence these communities and the organisms that inhabit them.

State Ranking Justification [-]
There are probably several hundred 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 rivers and streams with sand or gravel substrate 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 [-]