Botany-Scholarly Publications

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Browsing Botany-Scholarly Publications by Author "Adekanmbi, O. H."

Now showing 1 - 7 of 7
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    Open Access
    Aeropalynological Studies of the University of Lagos Campus, Nigeria
    (Horticulture and Forestry Society from Transylvania, 2010) Adekanmbi, O. H.; Ogundipe, O.T.
    Aeropalynological studies were conducted in four selected sites at the University of Lagos campus, in the months of February, March, April and May of 2007. One pollen-collecting bucket containing 50 ml glycerol, 10 ml formaldehyde and 5 ml phenol, per site, was placed at each sampling site, namely the Botanical Garden, Lagoon Front, Engineering Department and Computer Center. The mixtures which attracted aerospore from the atmosphere were acetolysed, observed under the microscope and photomicrographs of palynomorphs were taken. The abundance of recovered pollen ranges from 64, in February to 132, in May. Recovered palynological assemblage from chemical engineering sampling point had the highest in February, Lagoon Front location had the highest in March, Computer Centre location had the highest in April and Lagoon Front had highest number of palynomorphs during May. A total of 393 palynomorphs were counted at all, belonging to 22 families. Poaceae were abundant representing 26.33% of the total pollen, Asteraceae represents 12.72%, Mimosaceae (8.89%), Ferns spores (8.64%), Arecaceae (5.85%) and Euphorbiacae (5.34%) among others. The palynomorphs abundance and diversity hits the peak in May which corresponds to the wettest month of the sampled period.
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    Open Access
    Airborne pollen and fungal spores in Garki, Abuja (North-Central Nigeria)
    (Springer Nature Switzerland, 2016) Ezike, D. N.; Nnamani, C. V.; Ogundipe, O.T.; Adekanmbi, O. H.
    The ambient atmosphere is dominated with pollen and spores, which trigger allergic reactions and diseases and impact negatively on human health. A survey of pollen and fungal spores constituents of the atmosphere of Garki, Abuja (North-Central Nigeria) was carried out for 1 year (June 1, 2011–May 31, 2012). The aim of the study was to determine the prevalence and abundance of pollen and fungal spores in the atmosphere and their relationship with meteorological parameters. Airborne samples were trapped using modified Tauber-like pollen trap, and the recipient solutions were subjected to acetolysis. Results revealed the abundance of fungal spores, pollen, fern spores, algal cysts and diatoms in decreasing order of dominance. The atmosphere was qualitatively and quantitatively dominated by pollen during the period of late rainy/harmattan season than the rainy season. Numerous fungal spores were trapped throughout the sampling periods among which Alternaria spp., Fusarium spp., Cladosporium spp. and Curvularia spp. dominated. These fungi have been implicated in allergic diseases and are dermatophytic, causing diverse skin diseases. Other pathogenic fungi found in the studied aeroflora were Dreschlera spp., Helminthosporium spp., Torula spp., Pithomyces spp., Tetraploa spp., Nigrospora ssp., Spadicoides spp., Puccinia spp. and Erysiphe graminis. Total pollen and fungal spores counts do not show significant correlation with meteorological parameters.
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    Open Access
    Foliar epidermal morphology of some Nigerian species of Senna (Caesalpiniaceae)
    (Indian Society for Education and Environment, 2009) Ogundipe, O.T.; Kadiri, A. B.; Adekanmbi, O. H.
    A comparative foliar epidermal and petiole anatomical morphology of six commonly used pharmacodynamics species of Senna in Nigeria was investigated with a view to elucidating their taxonomic significance and present complementary data which would aid the recognition of the species. The cell shape may be polygonal and irregular on both surfaces and either polygonal or irregular on any of the two surfaces of the leaf. Anticlinal wall is either straight or undulate and curved. Usually, the epidermal cell size is more on the adaxial surface and the leaf is either amphistomatic or hypostomatic. Trichomes are usually slender acicular to conical and glandular or non-glandular. The vascular system of the petiole is arranged in a spaced arc. Based on this an indented dichotomous key is presented to distinguish the species.
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    Open Access
    Mangrove biodiversity in the restoration and sustainability of the Nigerian natural environment
    (Academic Journals, 2009) Adekanmbi, O. H.; Ogundipe, O.T.
    The objective of this study was to evaluate the floral biodiversity and sustainability of Lagos wetlands. In other to achieve this, mangrove communities of 8 localities in Lagos and its environs viz: Atlas Cove, Five Cowrie Creek, Maroko, Berger De Motz, Palaver Island, Bayeku, Majidun and University of Lagos beach were sampled. A comprehensive quantitative vegetation analysis of the vegetation within the selected lagoonal communities was carried out. Of the 8 sampled sites, only 2 - Palaver Island and Bayeku had their vegetation relatively well preserved. Mangrove at the vicinity of University of Lagos and Majidun preserve relics of their biodiversity. There was evidence of anthropogenic stress at Five Cowrie Creek, which is devoid of vegetation. Maroko swamp has been taken over by grasses, Berger De Motz has sandy substratum, high-energy wave and rip of any typical mangrove species. The study reveals that mangrove swamps in Nigeria are under serious anthropogenic threat. To ensure that these wetlands are not soon forgotten, pragmatic measures which must be put in place to curb degradation, restore, sustain and preserve this vital ecosystem are suggested.
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    Open Access
    Nectar Sources for the Honey Bee (Apis mellifera adansonii) Revealed by Pollen Content
    (Horticulture and Forestry Society from Transylvania, 2009) Adekanmbi, O. H.; Ogundipe, O.T.
    Nectar sources for the African honeybee Apis mellifera adansonii were investigated. The work involved analysis of three honey samples bought from open markets in Lagos, Nigeria. The pollen sediment of the honeys was acetolysed, mounted on slides and pollen types were identified and counted to determine the relative frequency of the different pollen types in the honey samples. The proportion of pollen from each of the honey samples varied from 196 in sample A, 280 in sample B to 238 in sample C. The most abundant taxa identified from the honey samples were Tridax procumbens and Elaeis guineensis belonging to the families Asteraceae and Palmae. The highest proportion of Palm pollen grain was recorded in sample B with one hundred and ten (110) pollen grains per slide. The pollen grains in the families Palmae and Asteraceae are of great importance to the bees for honey production, this can be seen in the abundance displayed in sample B and C. Other pollen taxa recovered belong to the families Mimosaceae, Euphorbiaceae, Sapotaceae and Anacardiaceae providing a clue on the ecological origin of the pollen grains in the honey sample. Pollen analysis of honey proved to be useful in deciphering nectar sources of Apis mellifera adansonii.
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    Open Access
    Palynological study of recent sediments from Ajido, Badagry coastal environment of Lagos, South-Western Nigeria
    (Botanical Society of Nigeria, 2017) Adekanmbi, O. H.; Ajikah, L. B.; Adeonipekun, A. P.; Ogundipe, O.T.
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    Open Access
    Vegetation change inferred from the pollen record in recent sediments from around the Lagos-East coastal environment (SW Nigeria)
    (Sciendo, 2019) Ajikah, L. B.; Adekanmbi, O. H.; Ogundipe, O.T.
    Recent sediments from the coastal environment of Lagos East, Nigeria, were used to make a palynological reconstruction of the vegetation of the study area and to draw inferences about its palaeoclimate. A total of 8456 palynomorphs were recovered, dominated by pollen grains of Poaceae (13.96%), Cyperaceae (6.23%), Alchornea cordifolia Müll-Arg (8.36%) and Elaeis guineensis Jacq (2.41%). Others were Cyclosorus afer Ching (2.18%), Rhizophora sp. (0.45%), Nephrolepis sp. (1.03%), Celtis sp. (0.25%) and Pteris sp. (0.13%). The composition of the recovered palynomorphs suggests that the past vegetation was predominantly a mosaic of freshwater swamp, with open to dry climate, as indicated by the records of Cyperaceae, Alchornea cordifolia, Elaeis guineensis, Arecaceae, Asteraceae, Acanthaceae and Chenopodiaceae/Amaranthaceae. Radiocarbon dates obtained from two depths (surface and deepest) indicate that the sediments were deposited around the last 103.8 ± 0.4 pMC (percentage Modern Carbon) and 111.9 ± 0.4 pMC, hence in the late Holocene. The study identified fluctuations between wet and dry climatic conditions in the Holocene of this area.