Water nutrients dynamics and use of chlorophyll ‘a’ in the determination of primary productivity of AMADI-AMA creek, upper bonny estuary, port Harcourt, Nigeria

water nutrients dynamics and use of chlorophyll‘a’ in the determination of primary productivity of Amadi-Ama creeks were investigated for 2years(January 2009-December, 2010). Water samples collected were analyzed following the standard limnological methods of APHA. Data were analyzed using sample statistical method of mean and subjected to ANOVA for significant difference at p≤0.05.All the parameters investigated exhibited significant difference spatially,temporally and seasonally except nitrate. The estimation of the phytoplankton biomass by chlorophyll ‘a’ ranged from 0.0-4.50mg/l. The productivity of the creek measured by chlorophyll ‘a’ increased in the dry season than the wet season and also highest in station 3.The observed chlorophyll’a’ value of the creek placed it between mesotrophic to eutrophic status.It was observed that chlorophyll‘a’ value increased with increase in water nutrients especially phosphate

Keywords:

Chorophyll ‘a’ , water nutrient , Primary productivity , Amadi-Ama Creek , Bonny Estuary , Nigeria