The Effects of Refinery Effluent of the Chlorophyll a and Gross Primary Productivity of River Rido

Abstract

The effect of Kaduna Refinery effluent discharge on the chlorophyll a and gross primary productivity of river Rido was studied for 12 months at 3 stations in the river. Station 1 is the clean water station not affected by the discharge; stations 2 & 3 are the polluted area. The values for chlorophyll a and gross primary productivity were low in all the stations. Station 1 showed significantly higher (P < 0.05) chlorophyll a and gross primary productivity values than the other two polluted stations. Significant differences (P < 0.05) associated with the seasons were also observed in all the stations. The biological significance of these are discussed.

Journal of Aquatic Sciences Volume 14, April 1999, pp. 43-46




KEY WORDS:

Discharge, chlorophyll a, gross primary productivity, effluents, polluted.