DEPARTMENT OF FOREST RESOURCES MANAGEMENT
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Item Ethnobotany of Some Selected Medicinal Plants(Forestry Research Institute of Ghana (Forig), 2011) Ofori, D. A.; Gyimah, A.; Obiri-Darko, B.; Adam, K. A.; Addae, A.; Jimoh, S.O.Item Reconnaissance Survey of The Wildlife Sanctuary of Stubb’s Creek Forest Reserve, Akwa Ibom State, Nigeria(Government of Akwa Ibom State, Nigeria Ministry of Environment, 2004) Popoola, L.; Jimoh, S.O.; Alarape, A. A.This study was conducted at the instance of the Honourable Commissioner, Ministry of Environment, Akwa Ibom State in realization of the need to assess the potentials of wildlife in the Stubbs-creek forest reserve of Akwa-Ibom State, Nigeria. The terms of reference included, but not limited to provision of information on status of fauna and flora in the forest reserve, bearing in mind the level of human interference that had occurred in the last one decade. Using a combination of standard methods wildlife, vegetation and questionnaire surveys were conducted in and around the forest reserve to obtain information on the status of the major plant and animal lives and the various sources of threat to their sustainable management. Results obtained from the study indicate large- scale disturbance of the biophysical environment (flora and fauna) arising from such human activities as farming, illegal logging, oil prospecting and exploration. These have affected the hitherto rich fauna and flora of the reserve. The study still identified the existence of over 80 important plant species, which include Alcornea cor difolia; Raphia spp; Anthocleista nobilis;; Rhizophora racemosa; Gmelina arborea; Costus afer; Chromolina odorata; Rauvolvia vomitoria; Calamus spp; Musanga cercopioides; Albizia spp; Selaginalea spp. Species with moderate frequency of occurrence include Carpolobia lutea; Napoleona vogelii; Allablackia floribunda. They were distributed within the natural lowland rainforest, oil palm and raphia bushes and the mangrove. Over 90 animal species including rodents, reptiles, birds and monkeys were encountered. They include Thryonomys swinderianus, Potamochoerus porcus, Trangelaphus scripus; Python sebae, Crocodilus spp, Neophron monachus, Milvus migrans, Streptopelia senegalensis, Apus affinis,, Egretta alba, Ardeola ibis, Scopus umbretta, Neophron monachus The potential of the wildlife sanctuary for ecotourism is still quite high particularly with the existence of oil prospecting and exploration concerns that attract heavy human traffic into the area. Also there exist standard hotels within 30km radius of the forest reserve, which will encourage visitors to combine business with pleasure. There is however the urgent need to: secure the boundaries of the sanctuary, carry out a feasibility study and environmental impact assessment with a view to having comprehensive information that will form the basis for re-investment by the State government and also set the template for the development of proposals for donor assistance from international donor/investment agencies, win the confidence of the settlers in the adjoining communities, seek local and external partnerships for the management of the sanctuary and; Finally, the institutional and legal frameworks of the reserve should be clearly spelt out to enhance sustainability. The Sanctuary has the potential to boost the Poverty Reduction Strategy Programme (PRSP) of the State Government and should therefore be rehabilitatedItem Population structure and threats to sustainable management of woody plant species in a Semi-Arid Agro-Ecosystem in Nigeria(2016) Dauda, T.H.; Jimoh, S.O.; Azeez, I.O.This study was conducted to assess population structure and threat to the sustainable management of woody species in the various ago-ecosystems in Dutsin-Ma Local Government Area (LGA) Katsina State, Nigeria. Purposive and stratified random sampling techniques were used to collect data from 21 randomly demarcated 100m × 100m sample plots. All woody plant species found in the sample plots with stem diameter >2 cm at 20cm above ground, were recorded. Population structure was summarized by diameter classes. For the identification of threats, field and questionnaire surveys were used. A total of 50 questionnaires were distributed at ten questionnaires per ward in five out of the 11 wards in the LGA. The highest numbers (350) of small diameter trees (0.1-1.0cm) were recorded in the agrosilvopastoral system. This was followed by silvopastoral and agrisilviculture systems with 89 and 85, respectively. However, the highest number of large diameter woody tree species was recorded in the silvopastoral system followed by agrosilvopastoral and agrisilviculture systems. The regular reverse J-shaped and fairly regular reverse J-shaped size class distribution observed for agrosilvopastoral and silvopastoral respectively, suggest a recuperating population. Over exploitation, debarking, de branching, root digging, leaf harvesting, seed harvesting, poor regeneration, slow rate of growth, wind effect and bush burning were the major threats to sustainable management of woody plant species in the study area. The implications of our findings for sustainable management of woody plant species in the study area are discussed and recommendations madeItem Biofuel initiatives in West Africa and the Sahel: potential for success(2015) Popoola, L.; Larwanou, M.; Jimoh, S.O.Global warming has heightened the need to substitute fossil fuels with biomass-based energy sources. Some West African countries have recorded appreciable progress in this regard though with inadequate documentation. This study documents the extent of production and use of different biofuels and incentives for sustainability in the sub-region. Field visits were conducted in Benin, Ghana, Niger and Nigeria with the aid of structured questionnaire and focus group discussions; and literature search in Mali, Niger and Senegal to assess current scenarios. Biofuel crop production (jatropha, cassava and sugarcane) is on the rise, howbeit, with foreign investments. That cassava and sugarcane are important staples in the sub-region constitutes a possible hindrance to their adoption, arising from food crisis currently being experienced there. Jatropha appears the most appropriate potential species. There is the need for enabling policies to enhance the optimum production and utilization of Jatropha for biofuel production in the sub-regionItem Comparative Assessment of Pathological Condition of Selected Mahogani Trees(University of Ibadan Centre for Sustainable Development, 2014) Onefeli, A.O.; Jegede, O.; Oyedeji, F.; Adegoke, F.; Adegeye, A. O.; Jimoh, S.O.Sustainability of mahogany trees have been threatened by the pandemic of fungal diseases, but Variation exists in the level of occurrence of the diseases among the trees. Thus, diagnosing the level of susceptibility of mahogany to the diseases will be the first step to ameliorating the impact of the diseases on the trees' abundance. This study comparatively investigated the pathological status of selected mahogany trees (Khaya senegalensis and Entandrophfagma cylindricum. Diseased samples of the tree species were collected from a mahogany forest located in Ijebu-Ode, Ogun State, Nigeria. Data were collected through laboratory analysis of the samples and statistically analyzed with the use of ANOVA and t-test at cto.os. Result shows that £. cylindricum is more susceptible to fungal attack by collectotrichum (66.67%), aspergillus (22.22%) and fusarium (18.51%). While in K. senegalensis, the frequency of occurrence (FOC) of the diseases were 62.96%, 14.81% and 14.81% respectively. There was however, no significant different in the FOC of the two species. ßut on utility, it is better tö adhere to K. senegalensis:it has less pathological weaknessItem Production of wine from the fruit pulp of African star apple (Chrysophyllum albidum G.Don,)(Ecological Society of Nigeria, 2014) Jimoh, S.O.; Adeniyi, T.E.; Oladele, A.T.African star apple Chrysophyllum albidum G.Don, (Sapotaceae) is an important forest tree species and valued for its fruits among forest dwellers across West and Central Africa. Utilization efficiency of the fruit pulp in Nigeria is limited to consumption as fruit snack during its season. Hence there are a lot of wastages offruits which are not marketed within few days of harvesting. Processing of the fruit pulp for industrial development may promote better utilization efficiency and sustainable management of the species. The study therefore investigated the potentials of the fruit pulp of the species in wine production. Fruits used for the study were collected from old and young trees at Laniba, Akinyele Local Government Area, Ibadan, Nigeria. Ripe fruits were plucked from young and old trees and the juice extracted from the fruit pulp. The wine was prepared by fermenting the juice, using graded levels of sucrose to produce dry and sweet wines. Chemical, microbial, heavy metals and sensory properties of the wine were determined. Heavy metals concentrations were within the WHO limits. Young and old trees fruit wines contain: Cr (22.74ppm/mg, 20.46ppm/mg), Pb (8.4ppm/mg, 2.4ppm/mg) and Mn (10.8ppm/mg, 9.6ppm/mg) respectively. The ascorbic acid contents were higher in old tree and sweet wine samples than young tree and dry wine samples (3.28 and 3.59%) and (2.06 and 2.11%) respectively. African star apple has good potentials as a raw material for fruit wine production. Food industries may consider the adoption of this indigenous species for fruit wine productionItem Population pattern and phenological behaviours for selected medicinal plants in Nigeria; implications for ex-situ conservation(2013) Oni, P.I.; Jimoh, S.O.; Adebisi, L.A.Recent developments indicated increasing gene-pool depletion for most medicinal plants in Nigeria despite their pharmaceuticals and therapeutic potentials. Initial socio-economic study involving three countries (Nigeria, Ghana and Republic of Benin) identified ten most frequently used medicinal plants. This list was superimposed on a vegetation map of Nigeria for the production of a distribution map ahead of an eco-geographic survey for population and phenological studies. Sample sites were defined in east-west directions under different vegetation and land use types. Sample sizes of 50m x 50m quadrant were selected across the vegetation and land use types. Altogether 55 samples quadrats were recorded across the zones; Lowland rainforest (20), Derived savanna (16), Sudan savanna (13) and Guinea savannah (6). A total of 196 individuals were recorded across the four ecological zones, rainforest 66 (33.67%) and least in Sudan savanna 13 individuals (6.63%). On land use basis, plantation forest recorded the highest in the lowland rainforest zone and least in sacred groove with similar trend in Derived savanna. In Guinea savanna, farm lands had the highest number of individuals while forest plantation accounted for the highest in Sudan savanna. Flowering duration varied greatly, ranging from (8.42 ±0.83) days to (45.25 ±5.77) days. Fruiting patterns ranged between (14.44± 4.28 to 145.87± 8.76) days. The need for adequate phenological information ahead of ex-situ conservation programme is desirable. Low stocking density observed across the range and land use types is implicated for holistic conservation strategies and sustainabilityItem Assessment of Tree Diversities in Oban Division of the Cross River National Park (CRNP), Nigeria(2013) Adeyemi, A.A.; Jimoh, S.O.; Adesoye, P.O.Many tropical forests are under great anthropogenic pressure and require management intervention to maintain the overall biodiversity, productivity and sustainability. This cannot be possible without proper understanding of their structure and species diversities. Tree diversity in Oban Division of the CRNP was assessed. Systematic sampling technique was adopted for plot locations. Two transects, 2km long with a distance of 600m apart were cut in each of the three study sites. Four plots of 50m><50m were laid alternately along each transect at 500m intervals in the closed canopy and secondary forests. Forty-eight plots were used for the study. Tree growth parameters were measured on all the trees with Dbh>10cm within each plot. All the measured trees were identified and classified into their respective families. Species diversity indices were computed for the trees in the two forest types. The canopy layer to which each tree belongs was noted. Data were analyzed using descriptive statistics, Diversity Indices, t-test as well as analysis of variance. A total of 118 species (107 genera and 37 families) of trees were recorded, with 72 and 69 species in the closed canopy and secondary forests respectively. The Strombosia spp. was the most abundant species in the forests. The family, Olacaceac accounted for 11.94% of the total individuals recorded in the area. This was followed by Mimosoideae (8.4%). The average tree stems/ha was 158 and 130 in the closed canopy and secondary forest respectively. The Simpson’ Indices were 0.99 and 0.98 for the two forest types respectively, which implied high floristic richness The Shannon-Wiener’s Indices (4.36 and 4.14) and the equitability ratios (0.9513 and 0.9506) were high for the two forest types, which indicated moderate representation of most of the species in the area. The tree growth parameters significantly differ under different canopy layers (P<0.05). However, most of the parameters were not significantly different in the two forest types fP>0.05)Item Farmers’ Preferences for Tree Species on Agroforestry System in Ijebu North Local Government Area, Ogun State, Nigeria(2012) Mustapha, R.I.; Jimoh, S.O.This study was conducted to generate information on tree species farmers are willing to retain or plant on then- farms; the benefits they derive from the trees and the traditional management practices used for such trees in Ijebu North Local Government Area of Ogun State, in southwestern Nigeria, Multistage sampling technique was used to collect data on the tree species preferred by farmers, the benefits derived from the trees and the management practices used for such trees. A structured questionnaire was administered and data were analyzed using simple descriptive statistics. Farmers retain 72 tree species on their farms based on their knowledge and socio economic needs. They retain and plant fruit trees (17%), timber trees (18%), fuelwood (1%), and medicinal trees (1%). Sixty three percent (63%) of the farmers retain all the types of tree species on their farms as scattered on-farm trees due to the benefits they derive from them. The benefits include: food (88.8%), firewood (78.8%), fruits (95.6%), shades (91.9%), traditional medicine (94.4%), income generation (98.8%) and other environmental services (31.4%). On- farm trees are regenerated or sown directly on the field. Pruning and coppicing are the management practices applied.Item Structural Characteristics of Borassus Aethiopum (Mart) Non-Timber Forest Products Markets in North-Eastern Nigeria(The Forestry Association of Nigeria, 2008) Tee, T.N.; Popoola, I.; Jimoh, S.O.This study analyzed the market structure of three products of Borassus aethiopum (a non-timber forest product); mats, hypocotyls and fruits in North-eastern Nigeria to ascertain their distributional efficiency. This was determined using market concentration and experience in trade. Market concentrations were deduced by adopting the Lorenz curves and Gini-coefficient of inequality. Data were generated with semi-structured questionnaires administered on 210 respondents, and market surveys. The result revealed that the mean weekly quantities of sales and purchases were Mats, 30 and 41 units (standard size 2.78m by 0.9m); Hypocotyls, 207Kg and 357.5Kg; and fruits, 162.3 Kg and 314.1 Kg respectively. The distribution of sales and purchases of mats, hypocotyls and fruits showed a fairly equitable distribution of trade in the hands of buyers and sellers (Gini- coefficients were <0.25). However, there was a relatively higher concentration of trade in the hands of a few buyers of fruits (Gini coefficient of inequality was 0.46). Results from business experience revealed that Borassus aethiopum trade has been thriving in North-eastern Nigeria for more than four decades and more people are still coming into the business unimpeded. Based on these features, its trade in Northeastern Nigeria was adjudged oligopolistic. Providing transportation facilities and improving market facilities and providing adequate information dissemination system will make Borassus aethiopum marketing more competitive and efficient.
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