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Abstract:
The physicochemical and epipelic algal analyses
of lower Bonny river, nigeria was carried out between September 1998 and February 1999. The result of
the physicochemical parameter and epipelic algal community in the catchment of the lower limit of the
Bonny river are described. 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
±
0.8 ´ 108 indiv. cm-2 to 6.3 ± 0.6 ´ 108 indiv. cm-2 in wet season and 3.9 ± 0.3 ´ 108 indiv. cm-2 to 6.9 ± 0.6 ´ 108 indiv. cm-2 in dry season. In addition, chlorophyll a
values range from 0.85 ± 0.15 to 2.61 ± 0.42 mg/cm-2 in wet season and 1.02 ± 0.12 to 4.45 ± 0.88 mg cm-2 in dry seasons, respectively. This range of variation was
considered rather relatively narrow and the whole community seems to be persistent and stable during wet
and dry seasons.
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