Abstract for F057

Temperate & Boreal Freshwater Aquatic Vegetation
Végétation aquatique d’eau douce des zones tempérée, boréale et arctique

This type occurs in shallow to deep water habitats in the temperate to boreal regions, where emergent vegetation is <10% cover, and submerged or floating-aquatic plants have >1% cover. The upper limits of salinity are set at approximately 0.5 ppt, above which it is considered saltwater. Submerged or floating-aquatic plants usually dominate the vegetation. Open surface water up to 2 m deep is present for all or most of the year. Water levels are seasonally stable, permanently flooded, or intermittently exposed during droughts, low flows or intertidal periods.

Source: Faber-Langendoen, D., T. Keeler-Wolf, D. Meidinger, C. Josse, A. Weakley, D. Tart, G. Navarro, B. Hoagland, S. Ponomarenko, J.-P. Saucier, G. Fults, E. Helmer. 2014. Classification and description of world formation types. Part I (Introduction) and Part II (Description of world formations). Hierarchy Revisions Working Group, Federal Geographic Data Committee, FGDC Secretariat, U.S. Geological Survey. Reston, VA, and NatureServe, Arlington, VA.

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