International Journal of Zoological Research1811-97781811-9786Academic Journals Inc.10.3923/ijzr.2007.41.47IlobaB. N.OdonA. P.1200731Soil microarthropods influence vital ecosystem processes such as decomposition, microbial spore dispersal and nutrient mineralization. Based on evidence that these micro species thrive best in moisture rich environment, this study was carried out in the rainy season. With all other physiochemical parameters relatively constant, responses of these soil microarthropods to three varying concentrations of crude oil spills within the same environment was viewed. A total of 314 soil microarthropods were collected in the crude oil spilled areas over 3 months. While the control site recorded high indices of biodiversity and species richness, the disturbed sites recorded low values with the highest species population size in the site with the lowest spill and vice-versa. Basically, results show that the crustaceans were the most sensitive species, The acarina were the most resistant and dominant while the collembolans were the most resilient groups of soil microarthropods to varying concentrations of the crude oil spills. However, the perturbation also influenced microbial populations as the control site had the highest aerobic viable count while the site with the highest spill had the lowest count.]]>Anderson, J.M. and P. Ineson,19851985pp: 413-432pp: 413-432Duncan, K., E. Jennings, P. Buck, H. Wells, K. Kalhatkar and K. Sublette,200312181206Hassink, J., L.A. Bouwman, K.B. Zwart and L. Brussard,1993254755Larry, P. and Wackett,20012001Set, H., E. Martikainen, M. Tyynismaa and V. Huhta,199010170177Shaw, P.J.A.,1988Onychiurus armatus.]]>31179185