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Articles by F.A. Tiseer
Total Records ( 2 ) for F.A. Tiseer
  Y. Tanimu , F.A. Tiseer , O.F. Ati and A.U. Ezealor
  A survey of Phytoplankton in the segments of the Hadejia-Nguru wetlands that falls into Bauchi and Yobe states, Nigeria was carried out in November 2010 using standard methods. Samples were collected from four sampling stations on the catchment of the three major rivers (Hadejia, Jama’are and Yobe) in the wetlands. Species of phytoplankton belonging to the Bacillariophyta (diatoms), Chlorophyta (green algae) and Cyanobacteria (blue-green algae) were observed from the samples. The Palmer pollution and Shannon-Wiener diversity indices indicated that the water quality in the wetlands is moderately polluted. Cluster Analysis showed similarities in the abundance and diversity of phytoplankton in the three rivers. The diatoms of the Jama’are River being more similar to those of the Hadejia River than that of the Yobe River while the green algae and cyanobacteria of the Yobe River and Hadejia River were more similar in comparison to those of the Jama’are River.
  F.A. Tiseer , Y. Tanimu and A.M. Chia
  A survey was carried out from November to December 2003 and May to June 2004 to determine the current status of macrovegetation and physicochemical parameters of Samaru stream in Zaria (7° 38’E and 11° 11’N), Nigeria. Five sampling stations were chosen at approximately equal distances from each other along the stream length. Temperature readings were 19.5±1.05 and 29.0±0.67°C; pH 7.496±0.11 and 7.07±0.07; EC 328.1±63.92 and 364±75.37 μS cm-1; TDS 163.3±31.99 and 185.5±37.20 mg L-1; DO 6.05±0.51 and 4.03±0.49 mg L-1; NO3-N 1.37±0.17 and 5.32±0.90 mg L-1; PO4-P 136.0±53.07 and 42.3±4.74 mg L-1; BOD 0.89±0.22 and 0.32±0.07 mg L-1 and Transparency 0.00 and 0.36±0.06 m in the dry and wet season respectively. Fifty three macrophyte species were recorded belonging to 26 families during the entire study. Ageratum conyzoides was the most frequent (80%) of all species observed in both wet and dry season. Very few true aquatic species were recorded during the study, these comprised Hydrophilla auriculata, Jussiae ripens, J. decurrens, Polygonum limbatum, P. linigerum, Oryza barthi and Ipomoea aquatica. The occurrence of macrophytes in the stream responded directly to eutrophication. This is because higher number species occurred in the dry season which significantly correlated (p≤0.05) with higher nutrient levels in the same season.
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