DOI: 10.1016/j.quascirev.2013.10.027
Scopus记录号: 2-s2.0-84889046774
论文题名: Quaternary forest associations in lowland tropical West Africa
作者: Miller C.S. ; Gosling W.D.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 84 起始页码: 7
结束页码: 25
语种: 英语
英文关键词: Ghana
; Lake Bosumtwi
; Pollen
; Quaternary
; Vegetation
; West Africa
Scopus关键词: Isotopes
; Lakes
; Vegetation
; Assemblage composition
; Ghana
; Interglacial periods
; Marine Isotope Stage 7
; Pollen
; Quaternary
; Terrestrial pollen records
; West Africa
; Forestry
; forest
; fossil record
; global climate
; Holocene
; interglacial
; marine isotope stage
; pollen
; Quaternary
; savanna
; vegetation
; Forestry
; Isotopes
; Lakes
; Plants
; Pollen
; Ashanti
; Georgia
; Ghana
; Lake Bosumtwi
; Savannah
; United States
; West Africa
; Amaranthaceae
; Caryophyllaceae
; Celtis
; Cyperaceae
; Macaranga
; Moraceae
; Poaceae
; Trema
; Uapaca
英文摘要: Terrestrial fossil pollen records are frequently used to reveal the response of vegetation to changes in both regional and global climate. Here we present a fossil pollen record from sediment cores extracted from Lake Bosumtwi (West Africa). This record covers the last c. 520 thousand years (ka) and represents the longest terrestrial pollen record from Africa published to date. The fossil pollen assemblages reveal dynamic vegetation change which can be broadly characterized as indicative of shifts between savannah and forest. Savannah formations are heavily dominated by grass (Poaceae) pollen (>55%) typically associated with Cyperaceae, Chenopodiaceae-Amaranthaceae and Caryophyllaceae. Forest formations are palynologically more diverse than the savannah, with the key taxa occurring in multiple forest zones being Moraceae, Celtis, Uapaca, Macaranga and Trema. The fossil pollen data indicate that over the last c. 520ka the vegetation of lowland tropical West Africa has mainly been savannah; however six periods of forest expansion are evident which most likely correspond to global interglacial periods. A comparison of the forest assemblage composition within each interglacial suggests that the Holocene (11-0ka) forest occurred under the wettest climate, while the forest which occurred at the time of Marine Isotope Stage 7 probably occurred under the driest climate. © 2013 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60404
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Environment, Earth and Ecosystems, Centre for Earth,Planetary, Space and Astronomical Research (CEPSAR), Walton Hall, Milton Keynes MK7 6AA, United Kingdom
Recommended Citation:
Miller C.S.,Gosling W.D.. Quaternary forest associations in lowland tropical West Africa[J]. Quaternary Science Reviews,2014-01-01,84