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Quantitative assessment of tidal wetlands using remote sensing

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Abstract

Effective management of tidal wetlands requires periodic data on the boundaries, extent, and condition of the wetlands. In many states, wetlands are defined wholly, or in combination with other criteria, by the presence of particular emergent halophytic plants. Many important characteristics of the wetlands ecosystem are related directly to the production of emergent plant material or may be inferred from knowledge of the distribution of emergent plant species. Remote-sensing techniques have been applied to mapping of the distribution of wetland vegetation but not to quantitative evaluation of the condition of that vegetation.

Recent research in the tidal wetlands of Delaware and elsewhere has shown that spectral canopy reflectance properties can be quantitatively related to the emergent green biomass ofSpartina alterniflora (salt marsh cord grass) throughout the peak growing season (April through September, in Delaware). Periodic measurements of this parameter could be applied to calculations of net aerial primary productivity for large areas ofS. alterniflora marsh in which conventional harvest techniques may be prohibitively time consuming. The method is species specific and, therefore, requires accurate discrimination ofS. alterniflora from other vegetation types. Observed seasonal changes in species spectral signatures are shown to have potential for improving multispectral categorization of tidal wetland vegetation types.

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Authors and Affiliations

  1. Marine Environments Branch, NASA-Langley Research Center, Mail Stop 272, 23665, Hampton, Virginia

    David S. Bartlett

  2. College of Marine Studies, University of Delaware, 19711, Newark, Delaware

    Vytautas Klemas

Authors
  1. David S. Bartlett
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  2. Vytautas Klemas
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Bartlett, D.S., Klemas, V. Quantitative assessment of tidal wetlands using remote sensing. Environmental Management 4, 337–345 (1980). https://doi.org/10.1007/BF01869426

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