| DOI: | 10.1016/j.epsl.2017.10.049
|
| Scopus记录号: | 2-s2.0-85033551201
|
| 论文题名: | The roles of fire in Holocene ecosystem changes of West Africa |
| 作者: | Dupont L.M.; Schefuß E.
|
| 刊名: | Earth and Planetary Science Letters
|
| ISSN: | 0012821X
|
| 出版年: | 2018
|
| 卷: | 481 | | 起始页码: | 255
|
| 结束页码: | 263
|
| 语种: | 英语
|
| 英文关键词: | African Humid Period
; fire
; Holocene
; precipitation
; Sahara
; vegetation
|
| Scopus关键词: | Charcoal
; Climate change
; Climatology
; Plants (botany)
; Precipitation (chemical)
; Submarine geology
; Vegetation
; Ecosystem changes
; Evolution of precipitation
; Fire occurrences
; Holocenes
; Humid periods
; Marine sediments
; Precipitation change
; Sahara
; Fires
; aridification
; desertification
; environmental change
; fire history
; Holocene
; humidity
; paleoclimate
; paleoecology
; precipitation (climatology)
; Cape Blanc
; Sahara
; West Africa
|
| 英文摘要: | The climate changes associated with the Holocene wet phase in the Sahara, the African Humid Period, are subject to ongoing debate discussing interactions between climate and vegetation and possible feedbacks between vegetation, albedo, desertification, and dust. However, very little attention has been given to the role of fire in shaping the land cover, although it is known that fires are important in the formation and consolidation of the African savanna. To fill this gap, we investigated the interaction between precipitation changes, vegetation shifts, and fire occurrence in West Africa by combining stable isotope measurements on plant waxes with pollen and micro-charcoal counts of marine sediments retrieved offshore of Cape Blanc. Our study focuses on the roles of fire at the dry limit of savanna during the Holocene evolution of precipitation changes indicating that the impact of fire during a relative wet climate differs from that during aridification. During the humid early Holocene, increased savanna extension and diversification ran parallel to increased fire occurrence. In contrast, after aridification of northern Africa started at the end of the African Humid Period, a maximum in fire occurrence correlated with a deterioration of the vegetation promoting desertification. © 2017 |
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/110191
|
| Appears in Collections: | 影响、适应和脆弱性
气候变化事实与影响
|
|
There are no files associated with this item.
|
|
作者单位: | MARUM – Center for Marine Environmental Sciences, University of Bremen, Leobener Str. 8, Bremen, D-28359, Germany
|
| Recommended Citation: | |
Dupont L.M.,Schefuß E.. The roles of fire in Holocene ecosystem changes of West Africa[J]. Earth and Planetary Science Letters,2018-01-01,481
|
|
|