Hydrophytic Vegetation

1
Hydrophytic Vegetation

• Layers
• Tree
• Shrub
• Herbaceous
• Vine
• Criteria
• gt 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 gt99
• Facultative wetland gt67 to 99
• Facultative 33 to 66
• Facultative Upland 1 to lt33
• Upland lt 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
Hydric Soils

• 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