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WETLAND VEGETATION

WETLAND VEGETATION. Ruth M. Ladd, P.W.S. Policy Analysis and Technical Support Branch U.S. Army Corps of Engineers New England District. Many types of wetlands. Swamp (has trees and/or shrubs) Marsh (salt and fresh) Bog. Forested swamp. Shrub swamp. Marsh. Wet meadow.

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WETLAND VEGETATION

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  1. WETLAND VEGETATION Ruth M. Ladd, P.W.S. Policy Analysis and Technical Support Branch U.S. Army Corps of Engineers New England District

  2. Many types of wetlands • Swamp (has trees and/or shrubs) • Marsh (salt and fresh) • Bog

  3. Forested swamp

  4. Shrub swamp

  5. Marsh

  6. Wet meadow

  7. Coastal Wetlands: Land Under the Ocean

  8. Coastal Beach

  9. Coastal Dunes

  10. Role in identifying wetlands • Three parameters of wetlands: hydrology, vegetation, and soils. • Hydrology is critical but highly variable. • Wetland soils, once developed, are fairly permanent • Vegetation provides “clue” of presence or absence or changes in hydrology

  11. UPL, FACU, FAC, FACW, OBL? • Species vary in their likelihood to be present in or absent from wetlands • US Fish and Wildlife Service’s “National List of Plant Species That Occur in Wetlands” lists likelihood of presence in wetlands • Morphological adaptations to wet conditions

  12. Adventitious roots

  13. Shallow root systems

  14. Inflated stems and leaves

  15. Use of vegetation in delineations • Wetland species dominate the wetland • Use of plots (upland and wetland) • Observations of adaptations • Problem situations

  16. Problem situations • Vegetation changes: • cut • removed • altered • Look at other parameters

  17. Conclusion • Vegetation is one of the clues to the presence or absence of wetlands • Be careful about relying on vegetation exclusively!

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