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- Title
A Survey of Algal Epiphytes from Vallisneria americana Michx. (Hydrocharitaceae) in the Lower St. Johns River, Florida.
- Authors
Dunn, Angela E.; Dobberfuhl, Dean R.; Casamatta, Dale A.
- Abstract
Epiphytic algae may be responsible for a significant amount of primary productivity in aquatic ecosystems, but also reduce available light, compete for nutrients, and increase drag on their living substrates. A survey of the epiphytic algal community of the submersed aquatic macrophyte Vallisneria americana Michx. (Hydrocharitaceae) in the lower St. Johns River, FL was conducted over a 17-month period. A total of 122 infrageneric taxa were collected at four sites along a 93-kin stretch of the river, yielding 32 diatoms (Bacillariophyta), 42 green algae (Chlorophyta), 45 blue-green algae (Cyanobacteria), 2 euglenoids (Euglenophyta), and 1 dinoflagellate (Pyrrophyta) taxa identified over the study period. However, only diatoms and cyanobacteria were seen at all sampling dates, and only a Cocconeis sp. was identified at all sites on all dates. This study provides baseline survey data of the epiphytic algal community in order to assess future anthropogenic effects.
- Subjects
SAINT Johns River (Fla.); FLORIDA; EPIPHYTES; ALGAE; BIOTIC communities; AQUATIC habitats; AMERICAN wildcelery
- Publication
Southeastern Naturalist, 2008, Vol 7, Issue 2, p229
- ISSN
1528-7092
- Publication type
Article
- DOI
10.1656/1528-7092(2008)7[229:ASOAEF]2.0.CO;2