Variability with depth of some physico-chemical and biological parameters of Atlantic Ocean water in part of the coastal area of Nigeria

Puyate, Y. T.; Rim-Rukeh, Akpofure

doi:10.4314/jasem.v12i1.55578

Cited by 8 publications

(7 citation statements)

References 2 publications

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“…This agreed with earlier report [3] of 29.00 to 29.60 °C and Nkwoji, et al [4] of 26.00 to 31.00 of temperature recorded from Lagos lagoon. It also falls within 27.30 and 30.50 °C of Lagos lagoon temperature reported by Shelle, et al [1], 1PUYATE and Rim-Rukeh [5]. It is however slightly lower than 24.00 to 28.33 °C recorded in Lagos lagoon by Adedayo, et al [2].…”

Section: Resultssupporting

confidence: 68%

Assessment of Some Physico-Chemical Parameters of Lagos Lagoon, Southwestern Nigeria

Oyeleke¹,

Popoola²,

Abiodun³

2019

AJC

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The pollution status of Lagos Lagoon was investigated to determine some physical and chemical parameters, in order to further understand its water quality. Five locations were selected according to the anthropogenic activities taking place in the areas. The measured parameters are water temperature, salinity, conductivity, pH, dissolved oxygen (DO) and alkalinity. The mean values ranged from 28.50-30.15°C for temperature, 7.86-8.50 for pH, ND-10.60‰ for salinity, 0.18-15.20µS/cm for electrical conductivity, 12.00-14.00 mg/l for alkalinity and 1.60-6.40 mg/l for dissolved oxygen. The statistical analysis of the measured physicochemical parameters revealed non-significant difference (p>0.05) across all stations in the physico-chemical parameters. Generally, the values obtained suggest the influence of anthropogenic activities especially the depletion of DO in most of the stations. Therefore, point source and non-point source pollution into the Lagos Lagoon should be controlled for the health and safety of the aquatic ecosystems. Generally, all the measured parameters were either below or within the permissible limits obtainable in the marine environment.

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Section: Resultssupporting

confidence: 68%

Assessment of Some Physico-Chemical Parameters of Lagos Lagoon, Southwestern Nigeria

Oyeleke¹,

Popoola²,

Abiodun³

2019

AJC

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“…Salinity is the measurement of the ionic composition of water and it varies depending on the mixing of relatively fresh inland waters with saline marine waters [35]. The distinction between saline and freshwater characteristics is evident in the diversity of the marine organisms there-in [36]. Other researchers suggest that salinity variation is caused by dilution and evaporation, with great influence on the fauna of the intertidal zones [37,38].…”

Section: Physicochemistrymentioning

confidence: 99%

Evaluation of the Pollution Status of Lagos Coastal Waters and Sediments, using Physicochemical Characteristics, Contamination Factor, Nemerow Pollution Index, Ecological Risk and Potential Ecological Risk Index

Ajani

Popoola

Oyatola

2021

IJECC

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The heavy metals and physicochemical properties of Lagos coastal waters and sediments, Southwestern Nigeria were investigated in 5 stations (station 1-5), to determine their levels, distributions and pollution index. The observed ranges of physicochemical characteristics from the study area are: dissolved oxygen (DO): 2.15-11.3 mg/L; pH: 6-7.7; temperature (Temp): 28.05-29.25°C; biochemical oxygen demand (BOD): 1.6-110.1 mg/L; electrical conductivity (EC): 1.8-29.8 mS/cm; salinity (SAL): 0.02-2.05ppt; total dissolved solids (TDS): 211.8-1210.2 mg/L and total suspended solids (TSS): 12.13-117.95 mg/L. The analyzed physicochemical properties from all the stations are within the desired values for healthy marine ecosystems when compared with Federal ministry of environment (FMENV) Nigeria and World Health organization permissible limits (DO:>5 mg/L; pH:6.5-9; TEMP:<40°C; BOD: 50 mg/L; EC:900 mS/cm; TDS:1000mg/L and TSS:600 mg/L), with the exception of low DO at station 1 and station 5; and high BOD at; station 2 and station 3 respectively. The concentrations of heavy metals present in the water samples followed the sequence: Fe > Pb > Cu > Cr > Zn > Cd, and showed high values for Pb, Cd and Cr, relative to the standard permissible limits according to FMENV (Pb 0.001; Zn 50 mg/L; Cd < 0.0018; Cu 2-4 mg/L and Cr 0.02-2.0 mg/L). The calculated contamination factor (CF) in the sediment samples showed low-moderate contamination for the analyzed heavy metals (Cr, Zn, Cu and Pb), except for cadmium (Cd) that showed extremely severe contamination (CF > 6) values across the sampling stations. The calculated Nemerow pollution index (NPI) and ecological risk index (RI) showed heavily polluted (NPI > 10) values and very high ecological risk (RI > 380) values at Apapa (location 1), Iddo (location 2) and Makoko (location 3). The potential ecological risk factor (Eir) confirmed Cd as the highest polluted heavy metals (Eir >320), with the greatest potential threat to the marine ecosystems in the Lagos coastal waters. The study highlights the impacts of anthropogenic pollutions on the coastal ecosystems and human health.

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“…One container at a time, with its lid closed was then dipped into the water body to a depth of about 1.0 m and the lid removed to fill the container with water. (The choice of 1.0 m was based (RPI, 1995), on the average depth of water bodies in the study area which is about 4.6 m and the fact that physico-chemical and biological parameters variability at such depths are negligible (Puyate and Rim-rukeh, 2008).…”

Section: Study Areamentioning

confidence: 99%

Assessment of water quality of traditionally protected and unprotected rivers, streams and ponds in the Niger Delta, Nigeria

Rim-Rukeh¹,

Irerhievwie²

2014

J. Ecol. Nat. Environ.

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Water quality of some traditionally protected water bodies (Obi Pond, Abua Lake, Usede Lake, Atochi Stream and River Ethiope (Source) and unprotected water bodies (Ame-Oghene Pond, Oguta Lake, Omoku Pond, Tenmako Lake and Ikarama Lake) that commonly serve for domestic and drinking purposes in the Niger Delta area of Nigeria have been studied. The purpose of this study was to compare the water quality of traditionally protected water bodies with unprotected water bodies. Water samples collected from the identified sources was experimentally determined using various laboratory methods. Study was carried out within the early rainy season (May to June) of 2013. The water quality of each of the water bodies was assessed using Malaysian water quality index (WQI) and results show that, the water quality of the traditionally protected Obi Pond, Abua Lake, Usede Lake, Atochi Stream and River Ethiope (Source) are 76.73, 76.13, 76.65, 77.04 and 81.25, respectively and belong to class II. Empirically, the water quality can be described as good. The WQI of unprotected Ame-Oghene Pond, Oguta Lake, Tenmako Lake, Ikarama Lake and Omoku Pond are 65.64, 67.46, 37.60, 43.38 and 65.81, respectively. Water quality of Ame-Oghene Pond, Oguta Lake and Omoku Pond belong to Class III and can empirically be described as medium or average while the water quality of Tenmako Lake and Ikarama Lake belong to Class IV and can be empirically described as fair. Using the two-tailed T-test formula to evaluate the null hypotheses, results showed that the calculated t-value was 123.98 while that obtained from the t-Tables at 95% confidence level was 2.31 and hence the null hypotheses was rejected. This means that there is significant difference between the water quality of traditionally protected water bodies and the unprotected water bodies. We are of the view that by incorporating natural sacred sites into the existing protected area networks will improve natural resource conservation.

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Variability with depth of some physico-chemical and biological parameters of Atlantic Ocean water in part of the coastal area of Nigeria

Cited by 8 publications

References 2 publications

Assessment of Some Physico-Chemical Parameters of Lagos Lagoon, Southwestern Nigeria

Assessment of Some Physico-Chemical Parameters of Lagos Lagoon, Southwestern Nigeria

Evaluation of the Pollution Status of Lagos Coastal Waters and Sediments, using Physicochemical Characteristics, Contamination Factor, Nemerow Pollution Index, Ecological Risk and Potential Ecological Risk Index

Assessment of water quality of traditionally protected and unprotected rivers, streams and ponds in the Niger Delta, Nigeria

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