Journal of Ecosystems / 2014 / Article / Tab 4

Research Article

Water Physicochemistry and Zooplankton Fauna of Aiba Reservoir Headwater Streams, Iwo, Nigeria

Table 4

Spatial variation of water physicochemical parameters in Aiba and Onikan lotic systems (May 2013–March 2014).

Parameter Upper reachesLower reachesMann-Whitney test
value value

Aiba stream
Water temperature (°C)25.6 ± 1.327.3 ± 1.670.0927
Water depth (m)0.8 ± 0.11.3 ± 0.42.50.0163
Secchi depth (m)0.26 ± 0.140.56 ± 0.1830.0202
Channel width (m)14.3 ± 2.315.0 ± 3.3150.6889
Flow velocity (m/s)0.022 ± 0.0220.009 ± 0.009110.298
Discharge (m3/s)0.252 ± 0.1160.473 ± 0.635100.2298
TS (mg/L)269 ± 251114 ± 2630.0202
TSS (mg/L)200 ± 22353±1920.0131
TDS (mg/L)69 ± 3661 ± 2816.50.8728
pH7.27 ± 0.767.20 ± 0.29120.3785
Electrical conductivity (S/cm)126.0 ± 32.4117.3 ± 29.313.50.5218
Total alkalinity (mgCaCO3/L)36.1 ± 16.036.6 ± 14.5170.9362
(mg/L)0.65 ± 0.770.86 ± 0.5510.50.2623
(mg/L)0.57 ± 0.410.57 ± 0.4516.50.8728
Dissolved oxygen (mg/L)2.6 ± 1.45.9 ± 1.620.0131

Onikan stream
Water temperature (°C)25.9 ± 1.526.7 ± 1.510.50.2623
Water depth (m)0.32 ± 0.090.98 ± 0.322.50.0163
Secchi depth (m)0.24 ± 0.070.54 ± 0.183.50.0250
Channel width (m)1.9 ± 0.74.1 ± 0.910.0082
Flow velocity (m/s)0.187 ± 0.1440.014 ± 0.019100.2298
Discharge (m3/s)0.146 ± 0.1360.065 ± 0.11715.50.7488
TS (mg/L)184 ± 20115 ± 4080.1282
TSS (mg/L)106 ± 3155 ± 37110.298
TDS (mg/L)78 ± 3960 ± 36150.6889
pH7.38 ± 0.636.97 ± 0.1317.51
Electrical conductivity (S/cm)194.0 ± 62.3159.5 ± 82.315.50.7488
Total alkalinity (mgCaCO3/L)45.5 ± 23.533.6 ± 13.2170.9362
(mg/L)0.43 ± 0.390.68 ± 0.38100.2298
(mg/L)0.36 ± 0.280.64 ± 0.4990.1735
Dissolved oxygen (mg/L)5.8 ± 1.46.0 ± 1.1130.4712

= 12, critical value of = 5 at .

You are browsing a BETA version of Hindawi.com. Click here to switch back to the original design.