wetlands l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Wetlands PowerPoint Presentation
Download Presentation
Wetlands

Loading in 2 Seconds...

play fullscreen
1 / 29

Wetlands - PowerPoint PPT Presentation


  • 164 Views
  • Uploaded on

Wetlands. Photo by R. Grippo. Introduction. Currently very hot area in resource management Called by many names  swamps, bogs, fens, marshes, vernal ponds, pocosins (NC) Important in ecological restoration because >50% of natural wetlands have been destroyed. Ecosystem Services of Wetlands.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Wetlands' - vail


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
wetlands
Wetlands

Photo by R. Grippo

introduction
Introduction
  • Currently very hot area in resource management
  • Called by many names  swamps, bogs, fens, marshes, vernal ponds, pocosins (NC)
  • Important in ecological restoration because >50% of natural wetlands have been destroyed
ecosystem services of wetlands
Ecosystem Services of Wetlands
  • Sponge effect - decrease flood peak and increase flow during drought
ecosystem services of wetlands10
Ecosystem Services of Wetlands
  • Sponge effect - decrease flood peak and increase flow during drought

2. Groundwater cleansing – wetlands metabolize water  increase water quality (biological filters)

ecosystem services of wetlands12
Ecosystem Services of Wetlands
  • Sponge effect - decrease flood peak and increase flow during drought
  • Groundwater cleansing – wetlands metabolize water  increase water quality (biological filters)
  • Decreased shoreline erosion – plants stabilize banks
slide14

Coastal mangrove swamp, Belize, Central America

Photo of R. Grippo and Penn State student

ecosystem services of wetlands16
Ecosystem Services of Wetlands
  • Sponge effect - decrease flood peak and increase flow during drought
  • Groundwater cleansing – wetlands metabolize water  increase water quality (biological filters)
  • Decreased shoreline erosion – plants stabilize banks
  • High in primary productivity (2nd only to tropical rainforest) = reduce greenhouse effect
history of wetland destruction
History of Wetland Destruction
  • Towns usually built on stream corridors
  • Tradition  drain swamps (malaria, etc)
  • Agriculture  87% of losses to increase tillable land
  • Unequal distribution of losses
    • Coasts
    • Northern tier
    • Southern coastal plain
    • Major river basins
history of wetland destruction18
History of Wetland Destruction
  • Towns usually built on stream corridors
  • Tradition  drain swamps (malaria, etc)
  • Agriculture  87% of losses to increase tillable land
  • Unequal distribution of losses
    • Coasts
    • Northern tier
    • Southern coastal plain
    • Major river basins
  • 1955  1975 loss of of 550,000 acres of wetlands/year  CWA passed to prevent further loss  still lost 92,500 acres/yr up to 1985  reauthorize CWA , tighten laws much more  still a big problem (saw on last weeks field trip)
  • State with most wetlands = Alaska (only lost 1% so far)

Note: wetlands are the 1º target of restoration efforts because 50-90% of historical wetlands are gone

regulation
Regulation
  • Section 404 of Clean Water Act - “No dredged or fill material can be placed into any waterway of the US (including wetlands)

Note: does not prevent draining, clearing or polluting wetlands (but hard to get permission to do)

section 404 con t
Section 404 (con’t)
  • Gives implicit authority to EPA, and Army Corps of Engineers to manage wetlands

Note: COE not allowed to delineate, only verify

  • Section 404 permits - need before dredge/fill

Note: these are rarely denied, process just made so difficult that permit is usually withdrawn

  • US FWS and NRCS (National Resource Conservation Service) place classification on soil that determines whether there is a wetlands or not.
wetland conservation provision of the food security act of 1985 swampbuster
Wetland Conservation provision of the Food Security Act of 1985 (Swampbuster)
  • designed to discourage the conversion of wetlands into non-wetland areas
  • Previously, farmers allowed to use converted (filled) wetlands as part of acreage for determining subsidy (USDA encouraged loss of wetlands!)
  • Swampbuster - USDA now withholds certain subsidies if convert wetland
definition of wetlands
Definition of Wetlands
  • Palustrine - swamp-like, no deep open water
  • Lacustrine - associated with deep water lake, pond
  • Riverine - associated with stream, river
slide28

Florida Everglades

Photo by R. Grippo