Rates of Vegetation Succession on a Coastal Dune System in Northwest Florida
1997; Coastal Education and Research Foundation; Volume: 13; Issue: 2 Linguagem: Inglês
ISSN
1551-5036
Autores Tópico(s)Botany, Ecology, and Taxonomy Studies
ResumoMaps (1869, 1934) and aerial photographs (1953-1986) permit the dating of dune ridges on the Shell-Crooked Island barrier system, 25 km east of Panama City, Florida. Sampling of topography and vegetation along eight transects across these barrier islands allow a replacement sequence of dominant species on ridges and swales over the past 100+ yrs to be inferred. Once a foredune ridge is protected by a more seaward ridge, Uniola paniculata is replaced by another grass, Schizachyrium maritimum , within 2-17 yrs; the latter is replaced by the subshrub, Chrysoma pauciflosculosa , within 19-52 yrs; and this species in turn is replaced by the shrub, Ceratiola ericoides , within 53-117 yrs. In swales, the halophytes, Fimbristylis castanea and Paspalum distichum , are replaced by Eragrostis elliottii within 4 to 7 yrs after the beach tidepool is protected by a seaward dune ridge; Eragrostis is replaced by either Andropogon virginicus within 7 to 52 yrs, or by Muhlenbergia capillaris within 14 to 52 yrs. Development of swale vegetation over time is less predictable than is the vegetation sequence on ridges.
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