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Hydrophytic Vegetation

Hydrophytic Vegetation. Layers Tree Shrub Herbaceous Vine Criteria > 50% of dominant species are OBL, FACW, FAC from current list of species. Hydrophytic Vegetation. Prevalence = Dominant Basal area (trees) Aerial cover (herbs) Typically adapted

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Hydrophytic Vegetation

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  1. Hydrophytic Vegetation • Layers • Tree • Shrub • Herbaceous • Vine • Criteria • > 50% of dominant species are OBL, FACW, FAC from current list of species

  2. Hydrophytic Vegetation • Prevalence = Dominant • Basal area (trees) • Aerial cover (herbs) • Typically adapted • Frequency of occurrence in wetland areas • Obligate: >99 % • Facultative wetland: >67% to 99% • Facultative: 33% to 66% • Facultative Upland: 1% to <33 % • Upland: < 1%

  3. Hydric Soils • A hydric soil is a soil that formed under conditions of saturation, flooding, or ponding long enough during the growing season to develop anaerobic conditions in the upper part.

  4. Hydric Soils • Four broad criteria: • Organic soils • Mineral soils with high water tables • Ponded soils • Flooded Soils

  5. Hydric SoilsDevelopment Inundation or soil saturation Anaerobic conditions Chemical reduction (Fe, Mn, etc.) Distinctive soil characteristics

  6. Hydric Soils • Hydric soil criteria (Non-sandy soils) • Organic soils • Histic epipedon • Sulfidic material • Aquic moisture regime • Reducing soil conditions • Soil colors • Hydric soils list • Iron and manganese concretions

  7. Soil Color Munsell Color Chart Measured immediately below the A-horizon or at 10 inches, whichever is shallower Matrix chroma of 2 or less in mottled soils Matrix chroma of 1 or less in unmottled soils Hydric Soils

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