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Soil contamination by heavy metals is a major environmental concern eliciting from both natural and anthropogenic factors, with the potential to disrupt the delicate balance of physical, chemical and biological processes which soil fertility and structure depends upon. The study therefore investigated the heavy metals levels and degree of contamination of soils sampl ed from three purposively-selected ranges (Oyo-Ile, Marguba, Tede) of Old Oyo National Park, Nigeria. Surface soil samples (0 -15 cm) were randomly collected along chosen topographical catenae for four seasons with the aid of a soil auger. The samples were analysed for copper, zinc, lead, nickel, cadmium, chromium, iron and manganese using standard methods. Data collected were subjected to descriptive and inferential (ANOVA) statistics using SPSS v.20 with statistical significance set at α0.05. The result of the mean concentration of the heavy metals showed that only cadmium was higher than the permissible limit. The ANOVA result showed that there were significant differences in the concentrations of all the analysed heavy metals except Ni (P=0.123) across the seasons of sampling. The quantitative indices used to assess the degree of heavy metal contamination showed that the studied soils had moderate degree of contamination while soil contamination was observed more during the wet season. This study observed cadmium toxicity as well as moderate degree of soil heavy metal contamination in Old Oyo National Park. There is need for continuous assessment of soil quality in Old Oyo National Park as a means of ensuring good ecological health.

References

  1. S. Caeiro, M. H. Costa, T. B. Ramos, F. Fernandes, N. Silveria, A. Combra, G. Medeiros and M. Painho. Assessing heavy metal contamination in Sado Estuary sediment: An index analysis approach. Ecological Indicators 5, 2005, Pp. 151-169.
     Google Scholar
  2. J. C. Forster. Soil sampling, handling, storage, and analysis. In: Alef, K.,Nannipieri, P. (Eds.), Methods in Applied Soil Microbiology and Biochemistry. Academic Press, London, 1995, Pp. 49-121.
     Google Scholar
  3. K. M. Banat, F. M. Howari and A. A. Al-Hamada. Heavy metals in urban soils of central Jordan: Should we worry about their environmental risks? Environ Res. 97, 2005, Pp. 258-273.
     Google Scholar
  4. A. Emmanuel, S. J. Cobbina, D. Adomako, A. B. Duwiejuah and W. Asare. Assessment of heavy metals concentration in soils around oil filling and service stations in the Tamale Metropolis, Ghana. Afr. J. Environ. Sci. Tech, 8(4), 2014, Pp. 256-266.
     Google Scholar
  5. C. Osu and I. A. Okoro. Comparative evaluation of physical and chemical parameters of sewage from some selected areas in Port Harcourt Metropolis, Rivers State Nigeria. Continental Journal. Water, Air and soil pollution 2(1), 2011, Pp. 1-14.
     Google Scholar
  6. Y. Yi, Z. Yang and S. Zhang. Ecological risk assessment of heavy metals in sediment and human health risk assessment of heavy metals in fishes in the middle and lower reaches of the Yangtze River basin. Environmental Pollution 159, 2011, Pp. 2575 - 2585.
     Google Scholar
  7. R. M. Seifi, R. Alimardani and A. Sharifi. How Can Soil Electrical Conductivity Measurements Control Soil Pollution? Res. J. Environ. Earth Sci. 2(4), 2010, Pp. 235-238.
     Google Scholar
  8. G. U. Adie and O. Osibanjo. Assessment of soil-pollution by slag from an automobile battery manufacturing plant in Nigeria. Afr. J. Environ Sci. Technol. 3(9), 2009, Pp. 239–250.
     Google Scholar
  9. M. I. Yahaya, G. C. Ezeh, Y. F. Musa and S. Y. Mohammad. Analysis of heavy metals concentration in road side soils in Yauri, Nigeria. African Journal of Pure and Applied Chemistry; 4(3), 2010, Pp. 22-30
     Google Scholar
  10. M. Esteban and A. Castaño. Non-invasive matrices in human bio-monitoring: A review. Environ. Int., 35(2), 2009, Pp. 438 - 449.
     Google Scholar
  11. A. Battaglia, S. Ghidini, G. Campanini and R. Spaggiari. Heavy metals contamination in little owl (Athenenoctua) and common buzzard (Buteo buteo) from Northern Italy. Ecotoxicol. Environ. Saf. 60, 2005, Pp. 61-66.
     Google Scholar
  12. S. O. Oladeji, E. A. Agbelusi and A. S. Ajiboye. Assessment of Aesthetic Values of Old Oyo National Park. American Journal of Tourism Management, 1(3), 2012, Pp. 69-77.
     Google Scholar
  13. A. F. Akinyemi and I. B Kayode. Effects of Agricultural Practices on the Distribution of Western Hartebeest (Alcelaphus buselaphus) in Old Oyo National Park, Nigeria. Journal of Environmental Issues and Agriculture in Developing Countries. 2 (1), 2010, Pp. 121-130.
     Google Scholar
  14. A. Alarape. Culture and Conservation in and around Old Oyo National Park. Ph.D. Thesis Submitted to the Department of Wildlife and Fisheries, University of Ibadan, 2002.
     Google Scholar
  15. O. A Oyewale and I. I. Funtu. Lead, copper zinc levels in soils along Kaduna- Zaria high way Nigeria. Global Journal of Environmental Sciences 1, 2002, Pp. 7-13.
     Google Scholar
  16. A. A. Amusan, D. V. Ige and R. Olawale. Characteristic of soils and crops uptake of metals in municipal waste dump sites in Nigeria. J. Hum. Ecol., 17 (3), 2005, Pp. 167-171.
     Google Scholar
  17. D. Beyersmann and A. Hartwig. Carcinogenic metal compounds: recent insight into molecular and cellular mechanisms. Arch. Toxicol. 82, 2008, Pp. 493-512.
     Google Scholar
  18. A. A. Adeyi and N. Torto. Profiling heavy metal distribution and contamination in soil of old power generation station in Lagos, Nigeria. American Journal of Science and Technology. 1(1), 2014, 1-10.
     Google Scholar
  19. P. S. Kumar and J. K. P. Edward. Assessment of metal concentration in the sediment cores of Manakudy estuary, south west coast of India. Indian Journal of Marine Science 38 (2), 2009, Pp. 235-248.
     Google Scholar
  20. F. Rastmanesh, F. Moore, M. K. Kopaei, B. Keshavarzi and M. Behrouz. Heavy metal enrichment of soil in Sarcheshmeh Copper Complex, Kerman, Iran. Environ. Earth Sci. 62, 2010, Pp. 329-336
     Google Scholar
  21. L. Hakanson. Ecological risk index for aquatic pollution control, a sedimentological approach. Water Resource Journal. 14, 1980, Pp. 975–1001.
     Google Scholar
  22. G. Muller. Index of geo-accumulation in sediments of the Rhine River. Journal of Geology, 2, 1969, Pp. 108-118.
     Google Scholar
  23. M. Chai, F. Shi, R. Li and X. Shen. Heavy metal contamination and ecological risk in Spartina alterniflora marsh in intertidal sediments of Bohai Bay, China. Mar Pollut. Bull 84(1-2), 2014, Pp. 115-24.
     Google Scholar
  24. X. Lu, L. Wang, L.Y. Li, K. Lei, L. Huang and D. Kang. Multivariate statistical analysis of heavy metals in street dust of Baoji, NW China. J. Hazardous Mat. 173, 2010, Pp. 744-749.
     Google Scholar
  25. H. H. Huu, S. Rudy and A.V. Damme. Distribution and contamination status of heavy metals in estuarine sediments near CauOng harbor, Ha Long Bay, Vietnam. Geol. Belgica 13(1-2), 2010, Pp. 37-47.
     Google Scholar
  26. P. Papapreponis, R. Robertson, M. Roworth, F. L. R. Oston and S. A. Williams. Levels of Inorganics and organics in soil; when it is high? Environment and Health International, 8(1), 2006, Pp. 4-12.
     Google Scholar
  27. A. O. Omonona, F. Ajani, A. T. Adetuga and O. J. Koledoye. Assessment of heavy metal contamination in soil and water samples in Omo Forest Reserve, Nigeria. African Journal of Biomedical Research vol 22 (2), 2019, Pp. 207-214.
     Google Scholar
  28. G. Porter, J. Bajita-Locke, N. Hue and S. Strand. Manganese solubility and phytotoxicity affected by soil moisture, oxygen levels, and green manure additions. Comm. Soil Sci. Plant. Anal. 35, 2004, Pp. 99-116.
     Google Scholar
  29. R. Millaleo, M. Reyes-Diaz, A. G. Ivanov, M. L. Mora and M. Alberdi. Manganese as essential and toxic element for plants: Transport, Accumulation and Resistance Mechanisms. J. Soil Sci. Plant Nutr. 10 (4), 2010, Pp. 476 – 494.
     Google Scholar
  30. Y. Lei, H. Korpelainen and C. Li. Physiological and biochemical responses to high Mn concentrations in two contrasting Populus cathayana populations. Chemosphere 68, 2007, Pp. 686-694.
     Google Scholar
  31. O. S., Adefemi, D. Olaofe, and S. S. Asaolu. Seasonal variation in heavy metal distribution in the sediment of major dams in Ekiti-State. Pakistan J. Nutrition, 6(6), 2007, pp. 705-707.
     Google Scholar
  32. E. A. Oluyemi, G. Feuyit, J. A. O. Oyekunle and A. O. Ogunfowokan. Seasonal variations in heavy metal concentrations in soil and some selected crops at a landfill in Nigeria. African Journal of Environmental Science and Technology, 2(5), 2008, Pp. 089-096.
     Google Scholar
  33. M. I. Yahaya, S. Mohammad and B. K. Abdullah. Seasonal variation of heavy metals concentration in Abattoir dumping site in Nigeria. Journal of Applied Science and Environmental Management. 13 (14), 2009, Pp. 9-13.
     Google Scholar
  34. C. M. A. Iwegbue, F. E. Egobuez and C. Opuene. Preliminary assessment of heavy metals levels of soils of an oil field in the Niger Delta, Nigeria. International Journal of Environmental Science and Technology, 3 (2), 2006, Pp. 167-172.
     Google Scholar
  35. O. Karimi, S. Hesaraki and S. J. Mortazavi. Toxic Effects of Cadmium in Japanese quail (Coturnix japonica): Assessment of Body Weight and Histopathology of Liver and Kidneys. Advances in Environmental Biology, 8(17), 2014), Pp. 288-294.
     Google Scholar
  36. J. Liu, W. Qu and M. B. Kadiiska. Role of oxidative stress in cadmium toxicity and carcinogenesis. Toxicology and Applied Pharmacology, 238, 2009, Pp. 272-279.
     Google Scholar
  37. J. Pius. Mechanisms of cadmium carcinogenesis. Toxicology and Applied Pharmacology, 238, 2009, Pp. 272-279.
     Google Scholar
  38. A. Sarkar, G. Ravindran and V. Krishnamurthy. A brief review on the cadmium toxicity: from cellular to organ level. International Journal of Bio-Technology and Research, 3(1), 2013, Pp. 17-36.
     Google Scholar
  39. A. Annabi, K. Said and I. Messaoudi. Cadmium: bioaccumulation, histopathology and detoxifying mechanisms in fish. American Journal of Research communication, 1(4), 2013, Pp. 60‐79.
     Google Scholar
  40. J. R. Larison, G. E. Likens, J. W. Fitzpatrick and J. G. Crock. Cadmium toxicity among wildlife in the Colorado Rocky Mountains. Nature 406, 2000, Pp. 181-183.
     Google Scholar
  41. A. Filazi, R. Baskaya, C. Kum and S. E. Hismiogullari. Metal concentration in tissues of the Black sea fish Mugil auratus from Sinop-Iclimari, Turkey. Hum. Exp. Toxicol, 22, 2003, Pp. 85-87.
     Google Scholar
  42. S. R. Taylor and S. M. McLennan. The Continental Crust: its composition and evolution. Blackwell Scientific Publications, Oxford, 1985.
     Google Scholar
  43. P. S. Kumar, P. D. Delson and P. T. Babu. Appraisal of heavy metals in groundwater in Chennai city using a HPI model. Bull Environ Contam Toxicol 89 (4), 2012, Pp. 793-798.
     Google Scholar