Topography, Vegetation Cover And Below Ground Biomass Of Spatially Constrained And Unconstrained Foredunes In New Jersey, Usa
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Topography, Vegetation Cover And Below Ground Biomass Of Spatially Constrained And Unconstrained Foredunes In New Jersey, Usa

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Details:

  • Journal Title:
    Ocean & Coastal Management
  • Personal Author:
  • NOAA Program & Office:
  • Sea Grant Program:
    NJSGC/NJMSC (New Jersey Sea Grant Consortium)
  • Description:
    Space for dunes is often limited in developed areas, placing increased importance on human efforts to aid dune-building. This study assesses how different management strategies influence dune topography, surface cover and below ground biomass of vegetation on four dune segments in New Jersey in two successive years. Two segments are evolving without human actions, one with a cover of native vegetation (Ammophila breviligulata) and one with an invasive exotic (Carex kobomugi). Two segments are in developed areas and are maintained using sand fences, vegetation plantings and bulldozers; one of these segments uses bulldozers to bury a seawall.

    The foredunes evolving naturally are wider than foredunes in the developed segments and have more topographic variability alongshore. Foredunes in the developed segments are narrower because sand blown or washed landward is recycled. The naturally evolving A. breviligulata dune segment had the sparsest vegetation cover; the segment maintained mainly by sand fences and vegetation plantings had the densest cover. The crest of developed dunes can be higher than the crest of natural dunes with the same vegetation type and similar beach widths, but sediment volume may be restricted if the dune cannot migrate inland. Planting programs hasten dune accretion and are especially valuable on the dune ramp following wave erosion. Species dependent on mobile dunes can be favored where landward infrastructure is not threatened; species dependent on stable dunes can be favored in developed areas. Dune veneers placed over seawalls are temporary, but seawalls can favor evolution of stable-dune species landward of them.

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  • Source:
    Ocean & Coastal Management, 156: 117-126
  • DOI:
  • Document Type:
    Journal Article
  • Rights Information:
    Accepted Manuscript
  • Compliance:
    CHORUS
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