TY  - JOUR
T1  - Phytoplankton in the Lower Sombreiro River, Niger Delta, Nigeria
AU - , J.F.N. Abowei AU - , O.A. Davies AU - , C.C. Tawari 
JO  - Research Journal of Biological Sciences
VL  - 3
IS  - 12
SP  - 1430
EP  - 1436
PY  - 2008
DA  - 2001/08/19
SN  - 1815-8846
DO  - rjbsci.2008.1430.1436
UR  - https://makhillpublications.co/view-article.php?doi=rjbsci.2008.1430.1436
KW  - Phytoplankton
KW  -species composition
KW  -physico-chemistry
KW  -sombreiro river
KW  -Niger Delta
KW  -Nigeria
AB  - The phytoplankton of the lower Sombreiro River, was studied from August 2005-July 2006 using standard methods for examination of water and waste water. A total of 43 species from 5 taxonomic groups were recorded. <I>Melosira</I> <I>granulata</I> occurred most (5.2%) and <I>Stephanodiscus</I> <I>asroea</I> the least (0.7%). The family Bacillariophyceae was highest (50.3%) and Chrysophyceae, least (2.5%). The wet season recorded more phytoplankton (57.3%) than the dry season (42.7%). Station 1 had the highest record (32.9%) and station 4, the least (19.7%). There were significant differences in mean occurence between seasons, (F = 21.75, d.f. = 1467, p = 0.05) and among the stations (F = 11.91, d.f. = 1467, p = 0.05). The diversity indices ranged from 1.053-1.505 (Shannon-Wiener); 0.849-0.950 (Evenness); 3.759-7.226 (Margalef’s species richness) and 0.027-0.110 (Simpson’s dominance). The percentage total collection increased with increased temperature, increased conductivity and increased flow rate. However, it reduced with reduced temperature, conductivity, increased turbidity and rainfall. The correlation coefficients of phytoplankton abundance and physico-chemical parameters were negative with dissolved oxygen and pH. However, it correlated positively with flow rate.
ER  -