Vegetation change inferred from the pollen record in recent sediments from around the Lagos-East coastal environment (SW Nigeria)

Q2 Agricultural and Biological Sciences
L. Ajikah, O. Adekanmbi, O. Ogundipe
{"title":"Vegetation change inferred from the pollen record in recent sediments from around the Lagos-East coastal environment (SW Nigeria)","authors":"L. Ajikah, O. Adekanmbi, O. Ogundipe","doi":"10.2478/acpa-2019-0004","DOIUrl":null,"url":null,"abstract":"Abstract 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.","PeriodicalId":39861,"journal":{"name":"Acta Palaeobotanica","volume":"59 1","pages":"165 - 175"},"PeriodicalIF":0.0000,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Palaeobotanica","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2478/acpa-2019-0004","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
引用次数: 1

Abstract

Abstract 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.
根据尼日利亚西南部拉各斯-东海岸环境沉积物花粉记录推断的植被变化
摘要利用尼日利亚东拉各斯沿海环境的近期沉积物对研究区植被进行了孢粉重建,并对其古气候进行了推断。共检获花粉形态8456株,以禾科(13.96%)、苏柏科(6.23%)、堇叶Alchornea cordifolia m l- arg(8.36%)和豚草Elaeis guineensis Jacq(2.41%)的花粉粒为主。其余依次为Cyclosorus after Ching(2.18%)、Rhizophora sp(0.45%)、Nephrolepis sp(1.03%)、Celtis sp(0.25%)和Pteris sp(0.13%)。这些植被的组成表明,过去的植被主要是淡水沼泽的马赛克,气候是开放到干燥的,如Cyperaceae、Alchornea cordifolia、Elaeis guineensis、槟榔科、Asteraceae、棘科和Chenopodiaceae/ amaranaceae的记录。两个深度(表层和最深处)的放射性碳测年表明,沉积物沉积在最后103.8±0.4 pMC(现代碳百分比)和111.9±0.4 pMC,因此在全新世晚期。该研究确定了该地区全新世干湿气候条件的波动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Acta Palaeobotanica
Acta Palaeobotanica Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)
CiteScore
1.60
自引率
0.00%
发文量
5
审稿时长
20 weeks
期刊介绍: Acta Palaeobotanica is an international journal edited in English by the W. Szafer Institute of Botany, Polish Academy of Sciences, Kraków, since 1960, which publishes original palaeobotanical, palynological, palaeoecological and palaeophytogeographical papers, monographs, review and discussion articles and book reviews. It is the only journal in the Central and Eastern Europe publishing papers from all fields of palaeobotany. The journal is published regularly in one volume per year, with two numbers.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信