Land use and Land Cover Change in Ikwerre Local Government Area of Rivers State-Nigeria (1987-2020) (Published)
This study examined landuse and land cover change in Ikwerre Local Government Area of Rivers State. It adopted the cross-sectional research design, utilizing satellite images (1987-2020) and questionnaire for socio-economic data from 210 randomly selected households from seven communities (Aluu, Ubima, Elele, Igwuruta, Ozuoha, Isiokpo and Omagwa). Three research questions and three objectives guided the study. Satellite image classification and analysis was done with the RS and GIS tools of Landsat TM 1986, ETM image and ASTER. From the findings, the main landuse activities in the area are: crop cultivation, plantation agriculture, residential, institutional, commercial, transportation and recreational infrastructures; there is significant relationship between landuse and land-cover change, as the former leads to the later; there is significant difference in rate of land-cover change from1987-2020. While there is constant increase in rate of expansion of residential built-up at 9.3% (1987-1997) and 15.4% (2007-2020); plantations grew at 2% (1987-1997) and declined at 1.36% (2007-2020); there is a steady decline in land-cover for crop cultivation, institutional and recreational infrastructures. Finally, change in landuse and land-cover pose some social and environmental challenges on the people e.g. loss of forested lands, biodiversity, sacred grooves, wet lands; and decline in farmers’ income. The study recommended for the establishment of high rise residential and commercial buildings; and the diversification of the area’s economy into secondary activities and services.
Carbon Sequestration as a Climate Change Mitigation Activity-A Review (Review Completed - Accepted)
An unprecedented increase in the atmospheric concentration of carbon dioxide (CO2) from fossil fuel combustion and land use change necessitates identification of strategies for mitigating the threat of the attendant global warming. However, the challenges of climate change can be effectively overcome by the storage of carbon in terrestrial carbon sinks viz. plants, plant products and soils for longer periods of time. Carbon sequestration in this regard is truly a win–win strategy. It restores degraded soils, enhances biomass production, purifies surface and ground waters, and reduces the rate of enrichment of atmospheric CO2 by offsetting emissions due to fossil fuel.
The Relative Abundance of Floraspecies in the Tropical Rainforest Ecosystem of Boki Nigeria (Published)
This study was conducted with the view to analysing flora species abundance in the tropical rainforest ecosystem of Boki. Despite the spate of indiscriminate logging, this area still remains one of the few ecosystems that have been highly valued for its species diversity. Two forest formations the protected and the unprotected forest were used for the analysis. Six forest enclaves – Kanyang, Borum, Isobendeghe, Okwa I, Okwa II and Okwango were chosen for the study. Transects were laid from the centre of each forest enclave to the heart of the forest. Actual measurement of the quadrat started at a distance of 2km away from each enclave. A quadrat of 100m by 100m was demarcated for flora species identification and enumeration. The relative abundance was computed using the frequency of each species as percentage of the total species in the quadrat. The mean (x-) proportional abundance was computed to determine levels of flora species abundance. This was also complemented with the lognormal curve. Here, the number of flora species was plotted against individual species. The girth of each flora species was determined at breast height of 1.5m. The result of the analysis revealed that very few flora species were of low and high abundance whereas majority were in moderate abundance. Also majority of the trees in the area were in the category of 6-10 metre girth at breast height in the protected forest and 0-5 metre girth at breast height in the unprotected forest.