Interdunal wetland

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An interdunal wetland in wooded dunes, at Miller Woods in the Indiana Dunes National Lakeshore.

An interdunal wetland,interdunal pond or dune slack is a water-filled depression between coastal sand dunes. It may be formed either by wind erosion or by dunal encroachment on an existing wetland.[1] The wind erosion process involves wind scooping out sufficient sand to reach the water table, and typically occurs behind the first line of foredunes.[2]

The Indiana Dunes contain interdunal wetlands.[3] Many conservation efforts have been made to preserve parts of the Indiana Dunes.[3][4][5]

Because they are typically very shallow, interdunal wetlands warm quickly, and provide an abundant source of invertebrates eaten by many species of shorebirds.[6] Many interdunal wetlands are ephemeral, drying out during periods of low rain or low water.

In the Great Lakes region of North America, interdunal communities are typically mildly calcareous and dominated by rushes, sedges and shrubs.[6] They are tentatively classified as G2, or globally imperiled, under the NatureServe rankings.[1][6]

A distinction is sometimes made between interdunal and intradunal wetlands such as pannes, which form within a single dune as part of a blowout.


  1. ^ a b Wisconsin Department of Natural Resources (2008-10-13). "Interdunal Wetland". Natural Communities of Wisconsin. Retrieved 2011-06-26.
  2. ^ Washington Department of Natural Resources. "Ecological Integrity Assessment: North Pacific Coastal Interdunal Wetland" (PDF). Retrieved 2011-06-26.
  3. ^ a b Smith, S. & Mark, S. (2009). The Historical Roots of the Nature Conservancy in the Northwest Indiana/Chicagoland Region: From Science to Preservation. The South Shore Journal, 3. "Archived copy". Archived from the original on 2016-01-01. Retrieved 2015-11-22.CS1 maint: archived copy as title (link)
  4. ^ Smith, S. & Mark, S. (2006). Alice Gray, Dorothy Buell, and Naomi Svihla: Preservationists of Ogden Dunes. The South Shore Journal, "Archived copy". Archived from [1. the original] Check |url= value (help) on 2012-09-13. Retrieved 2012-06-13.CS1 maint: archived copy as title (link)
  5. ^ Smith, S. & Mark, S. (2007). The cultural impact of a museum in a small community: The Hour Glass of Ogden Dunes. The South Shore Journal, 2. "Archived copy". Archived from the original on 2012-11-30. Retrieved 2012-06-11.CS1 maint: archived copy as title (link)
  6. ^ a b c Kost, M.A.; Albert, D.A.; Cohen, J.G.; Slaughter, B.S.; Schillo, R.K.; Weber, C.R.; Chapman, K.A. (2007). "Interdunal Wetland". Natural Communities of Michigan: Classification and Description.

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