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1 Polish Journal of Ecology

1 2003

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Epipelic algal of tropical estuary : case of stable and invariable seasonally community

Chindah A. C., Braide S. A.

Polish Journal of Ecology

2003

Vol. 51, nr 1

91-99

The physicochemical and epipelic algal analyses in the catchment of lower Bonny river, Nigeria, was carried out between September 1998 and February 1999. A total of 51 species were observed of which Bacillariophyceae had 28 species followed by Cyanophyceae (19 species), Chlorophyceae (2 species), and Euglenophyceae (2 species) respectively. The epipelic algal abundance ranged from 3.2 [plus minus] 0.8 x 108 indiv. cm-2 to 6.3 [plus minus] 0.6 x 108 indiv. cm-2 in wet season and 3.9 [plus minus] 0.3 x 108 indiv. cm-2 to 6.9 [plus minus] 0.6 x 108 indiv. cm-2 in dry season. In addition, chlorophyll a values range from 0.85 [plus minus] 0.15 to 2.61 [plus minus] 0.42 mg cm-2 in wet season and 1.02 [plus minus] 0.12 to 4.45 [plus minus] 0.88 mg cm-2 in dry seasons respectively. This range of variation was relatively narrow and the whole community seems to be persistent and stable during wet and dry seasons.