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Epipellic Algae Profile of the Mixohaline Mangrove Swamp of Qua Iboe River Estuary (Nigeria)

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Abstract

The epipellic algae of Qua Iboe Estuary was studied in late summer (between January and February) of 1999. Physicochemical analysis of the tidal mud flats of the Estuary revealed a mixohaline habitat characterized by its high acidity (pH 4.72±0.02) and rich nutritive salts content. The results of the phytoplankton studies revealed variation in the density of the microalgae within the microalgal Orders. The epipellic algae community was predominated by pinnate diatoms. The mean densities of the phytoplanktons ranged from 102.75 organism/ha, 34.25 organism/ha, 21.25 organism/ha to 1.00 organism/ha of Pennales, Centrales, Zygnematales and Blue-Green algae, respectively. Their densities, however, decreased with increase in sampling distance from the low tide level. At the species level, Actinoptychus undulatus and Tabellaria sp. predominate the microalgae community. The occurrence of the freshwater diatom, A. undulatus, in an otherwise “harsh” salty epipellic habitat confirms the adaptive potential of some freshwater phytoplankton to marine ecosystem. Other phytoplankter present in the epipellic habitat of the estuary were Amphora ovalis, Campylodis cibrosus, Cymbella lanceolata, Navicular radiosa, N. rhynocephala, Pleurosignma sp., Pinnularia viridis, Stephanodiscus sp., Closterium sp., Oscillatoria nigroviridis and Nodularia spumigena.

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Authors and Affiliations

  1. Department of Botany and Microbiology, University of Uyo, P.M.B, 1017, Uyo, Nigeria

    J.P. Essien & R.M. Ubom

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  1. J.P. Essien
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  2. R.M. Ubom
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Essien, J., Ubom, R. Epipellic Algae Profile of the Mixohaline Mangrove Swamp of Qua Iboe River Estuary (Nigeria). The Environmentalist 23, 323–328 (2003). https://doi.org/10.1023/B:ENVR.0000031410.54285.ff

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