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Structure of diatom assemblages living on prop roots of the red mangrove (Rhizophora mangle) from the west coast of Baja California Sur, México

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Title: Structure of diatom assemblages living on prop roots of the red mangrove (Rhizophora mangle) from the west coast of Baja California Sur, México
Authors: Siqueiros Beltrones, David Alfaro
López-Fuerte, F Omar
Gárate-Lizárraga, Ismael
LC Subject Headings: Red mangrove--Mexico--Baja California Sur--Roots.
Diatoms--Habitat--Mexico--Baja California Sur.
Natural history--Periodicals.
Natural history--Pacific Area--Periodicals.
Issue Date: Jan 2005
Publisher: University of Hawaii Press
Citation: Siqueiros Beltrones DA, López-Fuerte FO, Gárate-Lizárraga I. Structure of Diatom Assemblages Living on Prop Roots of the Red Mangrove (Rhizophora mangle) from the West Coast of Baja California Sur, México. Pac Sci 59(1): 79-96.
Series/Report no.: vol. 59, no. 1
Abstract: Samples of epiphytic diatom assemblages found on prop roots of red mangrove (Rhizophora mangle) from four sites were collected at two tidal levels of exposure on two different dates from the cool season (autumn, spring). The overall floristic analysis yielded 171 diatom taxa, including 16 new records for the Baja California peninsula. Diversity estimates were among the highest ever measured for benthic diatoms using Shannon's (mean H' = 4:89) and Simpson's (0.945) indices. Many species scored high on the Biological Value Index (BVI), thus reflecting their numerical importance within the assemblages. According to diversity values and overall species composition, all sampling sites represented a similar habitat consisting of three types of substrates: prop roots, epiphytic macroalgae, and sediments. These values are considered to represent stability in the diatom assemblages living on red mangrove prop roots. Thus, the conditions determined by periodic tidal exposure are not to be considered extreme. However, principal component analysis and similarity measurements indicated that the November and April assemblages could be discriminated on the basis of taxa distribution.
Pages/Duration: 18 pages
ISSN: 0030-8870
Appears in Collections:Pacific Science Volume 59, Number 1, 2005

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