Journal of Marine Sciences / 2015 / Article / Tab 1 / Research Article
Composition of Periphyton Community on Water Hyacinth (Eichhornia crassipes ): In Analysis of Environmental Characteristics at Ejirin Part of Epe Lagoon in Southwestern Nigeria Table 1 Status of physicochemical parameters at Ejirin, part of Epe Lagoon, from December 2012 to May 2013.
Parameters December January February March April May Mean Standard deviation Water temp. (° C) 29.3 28.3 29 30.6 29.3 33.1 29.93 1.72 Transparency (cm) 43 57 41.5 38.5 34 31 40.8 9.11 Depth (cm) 25 28 30 27 30 26 27.7 2.07 pH 6.639 6.15 6.22 6.45 6.6 6.5 6.39 0.17 Conductivity (µs/cm) 0.192 0.154 0.2 0.006 0.2 0.35 0.18 0.11 TSS (mg/L) 55 66 170 73 1 1.1 61.01 62.09 TDS (mg/L) 0.65 79 87 141 119 161 97.94 56.95 Rainfall (mm) 13.2 0 28 50.1 165.3 340.8 99.57 132.25 Salinity ( ) 0 0 0 0.01 0 0 0.002 0.004 Nitrate (mg/L) 0.32 0.11 0.08 0.08 0.12 0.07 0.13 0.095 Phosphate (mg/L) 0.78 0.65 0.59 1.08 0.71 0.59 0.73 0.18 Sulphate (mg/L) 1.20 0.80 1.26 1.30 1.21 1.26 1.17 0.19 Silicate (mg/L) 0.40 0.80 0.11 0.05 0.05 0.06 0.25 0.30 Periphyton chl. a (mg/L) 0.003 0.001 0.003 0.003 0.0023 0.00096 Biological oxygen demand (mg/L) 4.8 0.4 2 3.7 2.2 0.8 2.32 1.68 Chemical oxygen demand (mg/L) 15 16 20 37 32 32 25.33 9.46 Dissolved oxygen (mg/L) 6.13 10 4.5 5 5.8 6 6.24 1.95