DOI: 10.1016/j.quascirev.2016.09.023
Scopus记录号: 2-s2.0-84989809104
论文题名: Pollen-based biome reconstructions over the past 18,000 years and atmospheric CO2 impacts on vegetation in equatorial mountains of Africa
作者: Izumi K. ; Lézine A.-M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 152 起始页码: 93
结束页码: 103
语种: 英语
英文关键词: Africa
; An inverse-vegetation modeling approach
; Biomes
; Holocene
; Last glacial-deglacial transition
; Pollen
Scopus关键词: Atmospheric composition
; Atmospheric pressure
; Biodiversity
; Forestry
; Glacial geology
; Inverse problems
; Repair
; Vegetation
; Africa
; Biomes
; Deglacial
; Holocenes
; Pollen
; Vegetation model
; Carbon dioxide
英文摘要: This paper presents a quantitative vegetation reconstruction, based on a biomization procedure, of two mountain sites in the west (Bambili; 5°56′ N, 10°14′ E, 2273 m) and east (Rusaka; 3°26′ S, 29°37′ E, 2070 m) Congo basin in equatorial Africa during the last 18,000 years. These reconstructions clarify the response of vegetation to changes in climate, atmospheric pressure, and CO2 concentrations. Two major events characterize the biome changes at both sites: the post-glacial development of all forest biomes ca. 14,500 years ago and their rapid collapse during the last millennium. The rates of forest development between the biomes are different; a progressive expansion of lowland biomes and an abrupt expansion of montane biomes. The trends of pollen diagrams and biome affinity scores are not always consistent in some periods such as the Younger Dryas interval and end of the Holocene Humid Period, because the biomization method is not a simple summarization of the pollen data, but also takes biodiversity into consideration. Our sensitivity experiment and inverse-vegetation modeling approach show that changes in atmospheric CO2 concentration unequally influence vegetation in different local environments. The study also suggests that the biome changes prior to the Holocene result from both changes in the atmospheric CO2 concentration and climate. The development of warm-mixed forest from xerophtic vegetation results from increases in atmospheric CO2 concentration and near-surface air temperature. Difference in local dryness results in the different biome distributions, with more forest-type biomes at Bambili and more grass/shrub-type biomes at Rusaka. © 2016 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59410
Appears in Collections: 过去全球变化的重建
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作者单位: Laboratoire de Météorologie Dynamique, IPSL, CNRS, Université Pierre et Marie Curie, 4 Place Jussieu, Paris, France; Laboratoire des Sciences du Climat et de l'Environnement, CNRS-CEA-UVSQ, Université Paris-Saclay, Gif-sur-Yvette Cedex, France; Sorbonne Universités, UPMC, Paris 06 Université, CNRS-IRD-MNHN, Laboratoire LOCEAN/IPSL, 4 Place Jussieu, Paris, France
Recommended Citation:
Izumi K.,Lézine A.-M.. Pollen-based biome reconstructions over the past 18,000 years and atmospheric CO2 impacts on vegetation in equatorial mountains of Africa[J]. Quaternary Science Reviews,2016-01-01,152