Department Of Botany
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Botany was one of the foundation departments of the Faculty of Science at inception in 1964 (the first Vice-Chancellor, Prof Eni Njoku, being a reputable Botanist of international stature) when the faculty was composed of the School of Biological Sciences and the School of Mathematical and Physical Sciences.
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Browsing Department Of Botany by Author "Adebayo, M. A."
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- ItemOpen AccessComparative palynology of Macrotermes sp. mounds and Vespula vulgaris nests on the University of Lagos campus, Akoka: preliminary study(De Gruyter, 2017) Adebayo, M. A.; Adeonipekun, P. A.; Adeleye, M. A.; Kemabonta, K. A.In order to assess the environmental indicator potential of wasp nests and termite mounds, the palynomorph content of three randomly selected Macrotermes sp. mounds (termitaria) and two Vespula vulgaris nests collected on the University of Lagos campus were examined. Palynological analysis showed the presence of 298 well-preserved palynomorphs showing characteristic morphological features. The recovered palynomorphs included pollen, pteridophyte spores and fungal spores, along with insect parts (106), diatoms (7) and a protest (1). The pollen assemblage of termite mounds comprised 78 pollen and pteridophyte spores, with Poaceae and Arecaceae pollen as dominants. In the wasp nest the pollen assemblage comprised 28 pollen and spore taxa, with Poaceae and Arecaceae pollen also dominant. Both mounds and nests had, besides diatoms, six pollen and spore taxa: Poaceae, Amaranthaceae, Pteridophyte spores, Arecaceae, Raffia sp. and Rhizophora sp. Vegetational grouping of the recovered pollen and spores indicated five phytoecological groups: secondary forest, mangrove swamp forest, freshwater, open vegetation and Poaceae. In statistical analyses, termite mounds had a higher species richness value (2.08 as compared to 1.99 from the wasp nests), while the wasp nests had a higher species diversity value (0.997 as compared to 0.845 from the termite mounds). Pollen analyses of the termite mounds and wasp nests suggest that both could be useful tools in environmental studies. This is the first attempt to evaluate the potential of termite mounds and wasps nest as natural pollen accumulators in Nigeria. The results suggest new possibilities for the use of the pollen records preserved in termite mounds and wasp nests for environmental studies.
- ItemOpen AccessDistribution and sporulation phenology of pteridophytes in Lagos state, Nigeria(Gupta Publications, 2019) Adeonipekun, P. A.; Oyebanji, O. O.; Adebayo, M. A.; Bamigbade, O. S.The importance of pteridophytes in past and present ecological, environmental and climate monitoring and aerobiology cannot be over-emphasized. Therefore, to provide phenological information on this plant group, a one-year (September 2016 – August 2017) documentation on the floristic composition and sporulation features of pteridophytes in four areas across Lagos State, Nigeria was effectuated using opportunistic sampling method. A total of 11 species belonging to 11 genera and seven families were documented. The richest family was Pteridaceae (four species) and are mostly terrestrial. Statistical analysis revealed positive correlations between: (i) average temperature and sporulation in A. aureum, C. cornuta and P. scolopendria in Badagry, (ii) temperature and sporulation in L. microphyllum in Epe, (iii) temperature and relative humidity and sporulation in N. biserrata in Ikorodu and (iv) relative humidity and sporulation in D. marginalis in Ikorodu. None of the species encountered was endangered, threatened or vulnerable. Some species sporulated across all sampled locations in some particular months, suggesting that these months represent their peak sporulation period. Based on the sporulation calendar created, we infer that pteridophytes in Lagos State sporulate mostly between the months of April and July. The microenvironment played major roles in the sporulation of all recorded pteridophytes with relative humidity, temperature and rainfall being the determinant meteorological factors.
- ItemOpen AccessImpact of seasonal changes on the vegetation composition of some selected areas in Lagos state, Nigeria(Complutense University of Madrid, 2019) Adeonipekun, P. A.; Oyebanji, O. O.; Adebayo, M. A.Rapid degradation of wetlands and habitat fragmentation are major threats to species diversity and ecological paradigm in Lagos state, Nigeria. Best to our knowledge, no empirical study has explored the effects of seasonal changes on covering three major cities in the statewithin the major cities in Lagos state. For this, we carried out a study covering the three major cities in Lagos: Badagry, Epe and Ikorodu. Permanent plots were randomly established for monthly data collection (quadrat method; size=10 x 10 m), that span across one-year period covering the wet and dry season). We observed two major vegetation types (secondary forest and mangrove) in the studied areas. Additionally, we documented 107 species belonging to 90 genera and 40 families. Species diversity analysis indicated higher diversity, abundance, species richness and evenness in Ikorodu and Epe during the wet has a greater while high species diversity was observed in Badagry during the dry season. The Dahomey gap phenomenon have greater implication on the Badagry vegetation while the coastal nature of Epe and Badagry negatively influenced their vegetation structure. Analyses inferred that species diversity pattern in the studied area seem to be determined by seasonal changes alongside anthropogenic activities and as a environmental factors (rainfall, geomorphology and geology). Further, our result suggests that Ikorodu could be regarded potential biodiversity hotspot area for conservation purposes because of its high floral composition and diversity. Therefore, improved management and conservation of the vegetation of the Ikorodu area is hereby recommended. The findings from this study will be useful in guiding the Physical Planning and Urban Development and Environment ministries in Lagos state for appropriate management and monitoring of developmental projects for sustainable development.