Paleoecological Evidence of a Pre-Settlement Sedge Wetland in a Piedmont River Valley

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dc.contributor.author Hart-Smith, John
dc.date.accessioned 2012-05-15T17:40:29Z
dc.date.available 2012-05-15T17:40:29Z
dc.date.issued 2012-05
dc.identifier.uri http://jhir.library.jhu.edu/handle/1774.2/36075
dc.description.abstract Recent stratigraphic analyses of macrofossil seeds in buried wetlands of the Piedmont of Maryland and southeastern Pennsylvania indicate that these prehistoric wetlands were hydro- climatically stable for several thousand years. At a river site in north central Maryland a core revealed no significant change in the sedge-dominated wetland for 4300 years until A.D. 1730. An environmental shift occurred in the 18th and 19th centuries as a result of burial of the prehistoric wetland by mill pond sediment behind dams, combined with an influx of sedimentation from extensive deforestation. This study examined seeds (macrofossils) from a series of samples extracted laterally from the core from this river bank to determine the lateral extent of the sedge wetland in the prehistoric river valley. Seeds found in the samples belong to obligate wetland species in contrast to the modern stream bank, which is lined by facultative, riparian trees. The dominant species in the prehistoric wetland was Carex stricta, the tussock sedge. Tussock sedge wetlands are a primary habitat for the endangered bog turtle (Glyptemys muhlenbergii) in the mid-Atlantic region. The hydrologic and vegetative characteristics of the prehistoric wetland offer a guideline on potential wetland restoration goals, including the restoration of critical habitat for the bog turtle. en
dc.description.provenance Submitted by David Reynolds (davidr@jhu.edu) on 2012-05-15T17:29:28Z No. of bitstreams: 2 Proposal for Independent Study.pdf: 824684 bytes, checksum: a83cc1442175c345d4eefbe6d63b4219 (MD5) Independent Study Hart-Smith.pdf: 1336059 bytes, checksum: e775f0d2ea2dfcd7e7db13a414040cc5 (MD5) en
dc.description.provenance Approved for entry into archive by David Reynolds(davidr@jhu.edu) on 2012-05-15T17:40:29Z (GMT) No. of bitstreams: 2 Proposal for Independent Study.pdf: 824684 bytes, checksum: a83cc1442175c345d4eefbe6d63b4219 (MD5) Independent Study Hart-Smith.pdf: 1336059 bytes, checksum: e775f0d2ea2dfcd7e7db13a414040cc5 (MD5) en
dc.description.provenance Made available in DSpace on 2012-05-15T17:40:29Z (GMT). No. of bitstreams: 2 Proposal for Independent Study.pdf: 824684 bytes, checksum: a83cc1442175c345d4eefbe6d63b4219 (MD5) Independent Study Hart-Smith.pdf: 1336059 bytes, checksum: e775f0d2ea2dfcd7e7db13a414040cc5 (MD5) Previous issue date: 2012-05 en
dc.language.iso en_US en
dc.publisher Advanced Academic Programs, The Johns Hopkins University en
dc.subject Site assessment en
dc.subject Paleoecology en
dc.subject Bog turtle en
dc.subject Restoration en
dc.subject Wetland en
dc.title Paleoecological Evidence of a Pre-Settlement Sedge Wetland in a Piedmont River Valley en
dc.type Thesis en

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