12 research outputs found
Phytoplankton Diversity in the Cross River Estuary of Nigeria
Studies on the species composition, relative abundance, spatial
distribution and diversity of phytoplankton assemblages in the Cross
River Estuary were carried out for twenty-four months, across six (6)
sampling stations. A total of 105 species of 57 genera, belonging to 5
families was observed. Bacillariophyceae (Diatom) was the most abundant
phytoplankton family, constituting 71.58% of total Algal density,
followed by Chlorophyceae (Green algae) with 13.84%, Cyanobacteria
(Blue-green algae) with 12.69%, while Euglenophyceae (Green
flagellates) and Dinophyceae (Dinoflagellates) recorded 0.88% and 1.01%
respectively, of total phytoplankton abundance. Bacillariophyceae
showed progressive importance from stations 1 to 6 while chlorophyceae
and Euglenophyceae were more abundant in stations 1, 2, and 3.
Cyanobacteria however, showed no spatial bias, whereas Dinophyceae were
observed only in stations 4, 5 and 6. Bacillarlophyceae was the most
dominant family, while chlorophyceae and cyanobacteria were observed to
be subdominant groups. Similarity of species occurrence was generally
observed in stations 1 and 2, station 3 and 4 and stations 5 and 6.
Analysis of variance (ANOVA) showed significant variation (P<0.05)
in community structure between stations 1, 5 and 6 whereas stations 1,
2 and 3 showed no significant difference (P>0.05) in composition of
phytoplankton assemblages. High abundance of certain cyanobacteria taxa
indicated environmental degradation
Influence of storage conditions and packaging materials on some quality attributes of water yam flour
The study investigated some quality attributes of water yam flour stored in three packaging materials [high and low density polyethylene and plastic container] under different storage conditions [relative humidity (36%, 56%, 75% and 96%), temperature (25±2, 35±2 and 45±2 °C)] for 24 weeks. The functional properties, proximate composition and microbial load of the samples were evaluated at 4 weeks interval. Significant differences (p<0.01) were observed for proximate composition, functional properties and microbial load of the samples during storage. The interactive effect of storage conditions and packaging materials was significant (p<0.01) on proximate composition and pasting properties (except trough viscosity). The yam flour samples were still shelf stable after the 24 weeks of storage