New York Natural Heritage Program
Unconfined River
Main channel stream at Sterling Creek Adele M. Olivero
System: Riverine
SubSystem: Natural Streams

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?
Meanders are winding bends in a stream channel; these features are characteristic of unconfined rivers. Occasionally, landowners channelize, or straighten, streams that meander through their property in order to, among other things, more quickly drain standing water from their land. Channel straightening, however, does more harm than good. It decreases the length of a river and increases its gradient, causing increased water velocity that leads to stream bed and stream bank erosion and slumping, channel widening and associated loss of a vegetated buffer, increased silt load, decreased food and cover for wildlife, increased flooding, and reduced in-stream habitat (pool/riffle) variation.

State Ranking Justification [-]
There are probably several hundred occurrences statewide. A few documented occurrences have good viability and are protected on public land or private conservation land. This community has statewide distribution, and includes 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 related to development pressure or alteration to the natural hydrology.

Short-term Trends [-]

Long-term Trends [-]