Epiphytic Diatoms of Three Seagrass Species in Mississippi Sound
Abstract:Epiphytic diatoms were collected on 20 July 1977 from the leaves of three seagrass species (Halodule beaudettei, Cymodocea filiforme, and Thalassia testudinum) in Mississippi Sound, U.S.A. Examination of cleaned material under the light and scanning electron microscope revealed a total of 45 diatom taxa epiphytic on the three seagrasses. The four most abundant diatoms were Fragilaria hyalina, Mastogloia pusilla, Licmophora cf. debilis, and Opephora pacifica. Except for the rare taxa, the taxonomic composition was identical regardless of the seagrass species examined. Based on counts of 1,000 valves, values of community diversity statistics (H′, S, and R′) were virtually identical for the three epiphytic diatom samples. Use of a selected similarity index (SIMI) revealed that any two samples shared between 82 and 88% of the maximum similarity possible. Therefore, the available taxonomic and structural information indicated that the above three seagrasses supported a single, nearly homogeneous epiphytic diatom community at the time of sampling.
Document Type: Research Article
Publication date: 1979-10-01
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