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Vegetation dynamics on eroding to accreting beach‐foredune systems, Florida panhandle

Identifieur interne : 002799 ( Main/Exploration ); précédent : 002798; suivant : 002800

Vegetation dynamics on eroding to accreting beach‐foredune systems, Florida panhandle

Auteurs : Michael C. A. Bitton [États-Unis] ; Patrick A. Hesp [Australie]

Source :

RBID : ISTEX:F762E193B93C586D54187F306FC4CDC90F7C60E3

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English descriptors

Abstract

Vegetation surveys were conducted on a variety of coastal foredunes in a largely natural region along the Gulf County region of the Florida panhandle. Species presence, absence and percentage cover were surveyed on 12 foredune profiles during different seasons. The vegetation data were analyzed using the Shannon–Wiener Diversity Index and Sørensen Index. Uniola sp. and Andropgon sp. were the dominant species on foredunes. Uniola sp. was found predominantly on the gulfward facing or stoss slopes, and Andropgon sp. was found to be dominant on the inland or lee slopes of foredunes. While they are present on all foredunes, their presence and percentage cover are dominant on rapidly prograding coasts. Prograding/accretional beaches had higher Sørensen Index values (i.e. higher similarities) than did the foredune‐vegetation profiles on eroding beaches. Diversity as indicated by the Shannon–Wiener analysis (H’) is greatest on the highest, and generally eroding dunes. Foredune diversity increased with foredune height, and the tallest foredunes were found on shorelines with relatively low erosion rates, where dunes were slowly translating landwards, cannibalizing older dunes, and moving into areas colonized by late successional species, such as Quercus sp. These observations of foredune species richness, diversity, profile similarities, and the use of ecological indices can provide excellent proxy evidence of shoreline dynamics, and in particular the degree of beach erosion and accretion, in the absence of historical erosion/accretion data. Copyright © 2013 John Wiley & Sons, Ltd.

Url:
DOI: 10.1002/esp.3436


Affiliations:


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Le document en format XML

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<term>Accreting beaches</term>
<term>Accretion</term>
<term>Average rate</term>
<term>Average wave heights</term>
<term>Beach erosion</term>
<term>Beach state</term>
<term>Beach width</term>
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<term>Coastal foredune</term>
<term>Coastal foredunes</term>
<term>Coastal research</term>
<term>Coastal vegetation</term>
<term>Copyright</term>
<term>Critical factors</term>
<term>Dissipative beach</term>
<term>Distribution evenness</term>
<term>Diversity index</term>
<term>Dominant species</term>
<term>Dune</term>
<term>Dynamics</term>
<term>Earth surf</term>
<term>Earth surface processes</term>
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<term>Foredune profiles</term>
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<term>Full profile</term>
<term>Geomorphology</term>
<term>Gulf county</term>
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<term>Hesp</term>
<term>High temperatures</term>
<term>Higher index values</term>
<term>Historical data</term>
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<term>Index values</term>
<term>Inset diagram</term>
<term>January</term>
<term>John wiley sons</term>
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<term>Landforms</term>
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<term>Larger dunes</term>
<term>Late successional species</term>
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<term>Louisiana state university</term>
<term>Marine geology</term>
<term>Martinez</term>
<term>Miot</term>
<term>Oenothera humifusa</term>
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<term>Older landward dunes</term>
<term>Other profile</term>
<term>Other profiles</term>
<term>Other species</term>
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<term>Paniculata</term>
<term>Pioneer species</term>
<term>Plant species</term>
<term>Profile</term>
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<term>Prograding coasts</term>
<term>Prograding profiles</term>
<term>Prograding sites</term>
<term>Psuty</term>
<term>Relative importance</term>
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<term>Seaward extent</term>
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<term>Sediment supply</term>
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<term>Site photograph</term>
<term>Species presence</term>
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<term>Stronger relationships</term>
<term>Study area</term>
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<term>Successional species</term>
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<term>Topographic profile</term>
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<term>Accreting beaches</term>
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<term>Average rate</term>
<term>Average wave heights</term>
<term>Beach erosion</term>
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<term>Critical factors</term>
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<term>Dominant species</term>
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<term>Dynamics</term>
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<term>Erosion rates</term>
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<term>Erosional sites</term>
<term>Excellent proxy evidence</term>
<term>Fdep profile</term>
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<term>Foredune development</term>
<term>Foredune height</term>
<term>Foredune profiles</term>
<term>Foredune species richness</term>
<term>Foredunes</term>
<term>Full profile</term>
<term>Geomorphology</term>
<term>Gulf county</term>
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<term>High temperatures</term>
<term>Higher index values</term>
<term>Historical data</term>
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<term>Late successional species</term>
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<term>Miot</term>
<term>Oenothera humifusa</term>
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<term>Plant species</term>
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<term>Profile similarities</term>
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<term>Prograding beaches</term>
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<term>Prograding profiles</term>
<term>Prograding sites</term>
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<term>Relative importance</term>
<term>Salt spray</term>
<term>Sand dunes</term>
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<term>Sediment</term>
<term>Sediment supply</term>
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<term>Shoreline change rates</term>
<term>Shoreline dynamics</term>
<term>Shoreline positions</term>
<term>Shrub species</term>
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<term>Site photograph</term>
<term>Species presence</term>
<term>Species richness</term>
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<term>Successional species</term>
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<div type="abstract">Vegetation surveys were conducted on a variety of coastal foredunes in a largely natural region along the Gulf County region of the Florida panhandle. Species presence, absence and percentage cover were surveyed on 12 foredune profiles during different seasons. The vegetation data were analyzed using the Shannon–Wiener Diversity Index and Sørensen Index. Uniola sp. and Andropgon sp. were the dominant species on foredunes. Uniola sp. was found predominantly on the gulfward facing or stoss slopes, and Andropgon sp. was found to be dominant on the inland or lee slopes of foredunes. While they are present on all foredunes, their presence and percentage cover are dominant on rapidly prograding coasts. Prograding/accretional beaches had higher Sørensen Index values (i.e. higher similarities) than did the foredune‐vegetation profiles on eroding beaches. Diversity as indicated by the Shannon–Wiener analysis (H’) is greatest on the highest, and generally eroding dunes. Foredune diversity increased with foredune height, and the tallest foredunes were found on shorelines with relatively low erosion rates, where dunes were slowly translating landwards, cannibalizing older dunes, and moving into areas colonized by late successional species, such as Quercus sp. These observations of foredune species richness, diversity, profile similarities, and the use of ecological indices can provide excellent proxy evidence of shoreline dynamics, and in particular the degree of beach erosion and accretion, in the absence of historical erosion/accretion data. Copyright © 2013 John Wiley & Sons, Ltd.</div>
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