This study assessed the Spatial and seasonal variation in Physico-chemical quality of Ikoli creek, Niger Delta, Nigeria. Triplicate samples were obtained from 5 locations for a two seasons viz; March and June, 2014. The water samples were analyzed following standard methods. Mean seasonality results for dry and wet were 27.47 and 27.33 o C (temperature), 6.78 and 7.102 (pH), 27.766 and 42.738 µS/cm (conductivity), 45.492 and 29.354 NTU (turbidity), 7.298 and 23.868 mg/l (total dissolved solid), 24.45 and 10.712mg/l (biological oxygen demand), 5.734 and 7.558 (dissolved oxygen), 0.066 and 0.072 mg/l (nitrite), 0.114 and 0.112 mg/l (nitrate), 3.14 and 3.088 mg/l (chloride), 4.354 and 4.336 mg/l (sulphate), 2.234 and 2.634 mg/l (calcium), 1.888 and 2.576 mg/l (potassium), 3.638 and 4.066 mg/l (sodium) and 1.348 and 1.732 mg/l (magnesium) respectively. There was significance difference (P<0.05) in most parameters for spatial distribution as well as seasonality. The study showed that season affect physico-chemical quality of Ikoli creek. Anthropogenic activities in the creek could affect the physico-chemical quality of water. This could be the reason while there was variation based on spatial distribution

Ecosystem in the Niger Delta has become a sanctuary for most endangered species, including mangrove and several forest reserve. The ketstone role of River Orashi in the Niger Delta is remarkable. The quality of River sediment very key in defining the bioavailability of aquatic system. The sedimentary assessment of River Orashi was carried out in six sampling stations (Mbiama, Agbo, Akiogbologbo, Okaki and Okparaki), in both Dry and wet seasons. Result showed that; pH ranged from 6.53-7.05, while Electrical Conductivity ranged from 124.31-590.01 µS/cm. While nitrite was 0.12-0.47 mg/kg, nitrate ranged from 0.72-3.76 mg/kg. The values of Sulphate and Phosphate were; 0.33-0.85 mg/kg and 0.24-0.43 mg/kg. Calcium ranged from 3.68-8.03 mg/kg, while magnesium was 1.99-6.86 mg/kg. Sodium and potassium were reported as 2.23-4.47 mg/kg and 1.41-3.62 mg/kg respectively. Other results reported includes; Nitrogen (2.52-4.63 mg/kg), Organic carbon (7.78-10.51 mg/kg), Carbon-Nitrogen (2.23-3.51 mg/kg), Total Hydrocarbon Content as in THC (4.96-9.62 mg/kg). Also on a general note, other parameters monitored were moderate, while electrical conductivity (EC) and all nutrients (Calcium, Magnesium, Sodium, Potassium, Nitrite, Nitrate, Sulphate and Phosphate), were higher in the Dry season. Our findings revealed mild anthropogenic activities within the Orashi River. We therefore call on all stake holders and inhabitants around the River Orashi to desist from anthropogenic activities that could infringe on biodiversity or public health.

Ecosystem in the Niger Delta has become a sanctuary for most endangered species, including mangrove and several forest reserve. The ketstone role of River Orashi in the Niger Delta is remarkable. The quality of River sediment very key in defining the bioavailability of aquatic system. The sedimentary assessment of River Orashi was carried out in six sampling stations (Mbiama, Agbo, Akiogbologbo, Okaki and Okparaki), in both Dry and wet seasons. Result showed that; pH ranged from 6.53-7.05, while Electrical Conductivity ranged from 124.31-590.01 µS/cm. While nitrite was 0.12-0.47 mg/kg, nitrate ranged from 0.72-3.76 mg/kg. The values of Sulphate and Phosphate were; 0.33-0.85 mg/kg and 0.24-0.43 mg/kg. Calcium ranged from 3.68-8.03 mg/kg, while magnesium was 1.99-6.86 mg/kg. Sodium and potassium were reported as 2.23-4.47 mg/kg and 1.41-3.62 mg/kg respectively. Other results reported includes; Nitrogen (2.52-4.63 mg/kg), Organic carbon (7.78-10.51 mg/kg), Carbon-Nitrogen (2.23-3.51 mg/kg), Total Hydrocarbon Content as in THC (4.96-9.62 mg/kg). Also on a general note, other parameters monitored were moderate, while electrical conductivity (EC) and all nutrients (Calcium, Magnesium, Sodium, Potassium, Nitrite, Nitrate, Sulphate and Phosphate), were higher in the Dry season. Our findings revealed mild anthropogenic activities within the Orashi River. We therefore call on all stake holders and inhabitants around the River Orashi to desist from anthropogenic activities that could infringe on biodiversity or public health.