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Palynological Evidence From Sediments of a Coastal Estuary in Lagos, Southern Nigeria
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Author(s): Linus Bashie Ajikah (University of the Witwatersrand, South Africa), Orijemie Emuobosa Akpo (University of Ibadan, Nigeria), Olugbenga Shadrak Alebiosu (University of Ibadan, Nigeria), Ethel Phiri (Stellenbosch University, South Africa)and Marion Bamford (University of the Witwatersrand, South Africa)
Copyright: 2024
Pages: 20
Source title:
Palynology and Human Ecology of Africa
Source Author(s)/Editor(s): Emuobosa Akpor Orijemie (Department of Archaeology and Anthropology, University of Ibadan, Nigeria)and Sylvester Onoriode Obigba (Palynology Laboratory, Department of Archaeology and Anthropology, University of Ibadan, Nigeria)
DOI: 10.4018/978-1-6684-7801-1.ch003
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Abstract
The environmental history of parts of the Lagos lagoon during the Late Holocene was reconstructed based on the palynological analyses of a 51cm sediment core retrieved from Itokin, Lagos, Nigeria. Three phases (I-III) of environmental changes, beginning from 1480±30 BP, were recognized. The inferred environmental changes were characterized by the mangrove swamp forests, freshwater swamp forests, and open vegetation in varied proportions and accompanied by conditions that fluctuated between wet and dry climates. The pollen evidence reveals that the Itokin landscape has remained open since the last 1500 yrs BP, dominated by open vegetation and freshwater swamp elements. The mangrove swamp forest decreased at some point but recovered. In contrast, the rainforest remained low in occurrence throughout the core. The drivers of these environmental changes and their ecological implications are highlighted.
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