Volume 4 No. 1, 2015
 
 
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Insight Ecology>>  Volume 4 Issue 1, 2015
Monitoring the Ecological Succession and Regeneration Status of a Post-Remediated Hydrocarbon Impacted Site in Parts of Ahia Oil-Field, in Omudioga, EMOLGA, Rivers State, Nigeria
E. A.B. Edu , N. L. Edwin-Wosu and N. D. Obiechere
 
Abstract: Background: Several biotic and abiotic factors including the influence of hydrocarbon and inorganic activities on population structure and regeneration of vegetation have been noted as agents of species on ecological succession. Similar studies have also been carried out by many workers in different forest ecosystem, but no information has been generated on this aspect for the post remediated Ahia oil-field under local environmental condition in Rivers State, Nigeria. Objective: Therefore, this study was aimed at assessing the post-phytodiversity and regeneration status of post-remediated crude oil impacted site in Ahia oil-field, in Rivers State, Nigeria. Methodology: Despite the heterogeneous mosaic nature of secondary vegetation of the study area, a total representative of 67 species under 15 families are recorded with monotypic heterogeneity of life forms in the study site, with various diversity and abundance. The Poaceae among the prevalent dominant families was the most diverse in species richness. The total representative species were establishing through coppicing, seedling and rhizome with greater percentage (42 = 63%) of the species exhibiting multiplier mode while 25 = 37.31% were solitary in regeneration status. Results: The phytosociological index assessment shows that Oldenlandia herbacea, Axonopus compressus and Heterotis rotundifolia had recorded the highest frequency of 50 = 4.65% occurrence, respectively. Axonopus compressus further had the highest abundance of 100 = 6.19%, Importance Value Index of 11.95%, richness of 0.06 and evenness of 0.03 in species diversity. The spatial distribution of species at the study site recorded a contiguous pattern with Oldenlandia herbacea recording the highest distribution pattern. The increase in the herbaceous life form of the study site is an indication of a primary regenerative succession that tends towards a pioneer vegetation array of shrubby and tree species of climax status. Conclusion: The study, therefore provide a complete view of regeneration trend in the study area, which is rich in regenerating species that could result in establishment of a diverse natural forest if protected with special attention to the scope of biodiversity conservation priority.
 
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    How to Cite:
E. A.B. Edu, N. L. Edwin-Wosu and N. D. Obiechere , 2015. Monitoring the Ecological Succession and Regeneration Status of a Post-Remediated Hydrocarbon Impacted Site in Parts of Ahia Oil-Field, in Omudioga, EMOLGA, Rivers State, Nigeria. Insight Ecology, 4: 24-34
DOI: 10.5567/ECOLOGY-IK.2015.24.34
 
 
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