Correlation between Physicochemical parameters of river Kaduna and its Phytoplankton population: an observational study.

Fadimatu Muhammad


Background: The physicochemical parameters of a river tell much about its quality and suitability for both humans and survival of the living biota within it. Phytoplanktons are photosynthesizing microscopic organisms that inhabit the upper surface layer of almost all oceans and bodies of fresh water. They constitute the primary producers of aquatic ecosystem. This study aimed to determine the relationship between physico-chemical parameters and phytoplankton abundance at four different locations. of river Kaduna, Kaduna Nigeria.

Materials and Methods: This was an observational study conducted in river Kaduna, North-western Nigeria. Sampling was done in two consecutive days. Samples from stations III and IV were done a day after sampling from stations I and II. Monthly sampling of the four sites was carried out from each sampling site for a period of eight months covering both the dry and the rainy season between 6:00am and 8:00am every sampling day. Temperature, pH, turbidity, total dissolved solids, electrical conductivity, dissolved oxygen, biological oxygen demand, total hardness, nitrate-nitrogen as well as phosphate-phosphorus were determined in the water samples using standard techniques. Phytoplankton population were identified in the water samples. The physic-chemical parameters were correlated with the phytoplankton population.

Results: Chlorophyta shows positive correlation with BOD while negatively correlated with temperature, turbidity, nirate-nitrogen and phosphate-phosphorus. Chryosophyta shows positive correlation with temperature, pH and DO. Bacillariophyta showed positive correlation with BOD and water hardness while negatively correlated with temperature, pH and phosphate-phosphorus. Cyanophyta shows positive correlation with DO, BOD and water hardness while negatively correlated with temperature, turbidity nitrate-nitrogen and phosphate-phosphorus.  

Conclusion: Member of the division chlorophyta, chryosophyta, bacillariophyta and cyanophyta all varied with months and seasons.


physico-chemical parameters, correlation, phytoplankton, kaduna

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