 |
|
Freshwater Intertidal Shore |
 Printer Friendly Version (PDF) |
System: Estuarine
SubSystem: Estuarine Intertidal State Protection: Not Listed Federal Protection: Not Listed State Rarity Rank: S2 
A State Rarity Rank of S2 means: Typically 6 to 20 occurrences, few remaining individuals, acres, or miles of stream, or factors demonstrably make it very vulnerable in New York State. 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? Bank erosion along freshwater intertidal shores can increase sedimentation and turbidity, which decreases the light availabilty to underwater plants and animals. Placing hard structures like bulkheads or rip-rap along developed shorelines to prevent erosion can destroy wetlands and actually increase erosion on adjacent shorelines. While these structures may be necessary along high energy shorelines, alternatives such as marsh restoration are effective, less expensive options. Retaining or restoring marshes lessens the effects of erosion, reduces pollutants entering the water, enhances fisheries near the property, and creates a more attractive setting. |
||||
| State Ranking Justification | [-] |
There are estimated to be less than 20 occurrences in the state, and probably not many more in the northeast. This small, narrow-band community is restricted to the freshwater portion of tidal rivers where the substrate is rocky or gravelly. There are less than 10 occcurrences currently documented by New York Natural Heritage and they are limited to Columbia, Green, Dutchess, and Ulster Counties.Given their location at the tidal-upland interface, several of these occurrences are threatened by shoreline development and invasive plants.
| Short-term Trends | [-] |
The number of freshwater intertidal shores in New York have probably remained stable in recent decades. However, the condition and size of a few occurrences may have declined due to invasive species, such as purple loosestrife (Lythrum salicaria) and reed grass (Phragmites australis ssp. australis).
| Long-term Trends | [-] |
The number of freshwater intertidal shores in New York probably declined substantially from historical numbers as a result of shoreline development (e.g., railroads) and river channel dredging.
|
Home | Advanced Search | About Us Animal Guides | Plant Guides | Community Guides © 2004-2012 New York Natural Heritage Program, a partnership between the New York State Department of Environmental Conservation and the State University of New York College of Environmental Science and Forestry Please cite this page as:
New York Natural Heritage Program. 2013. Online Conservation Guide for Freshwater Intertidal Shore. Available from: http://www.acris.nynhp.org/guide.php?id=9871. Accessed June 19th, 2013. 
|