DOI: 10.5194/cp-10-681-2014
Scopus记录号: 2-s2.0-84897389969
论文题名: Holocene changes in African vegetation: Tradeoff between climate and water availability
作者: Hély C. ; Lézine A.-M. ; Ballouche A. ; Cour P. ; Duzer D. ; Guinet Ph. ; Jahns S. ; Maley J. ; Mercuri A.M. ; Pons A. ; Ritchie J.C. ; Salzmann U. ; Schulz E. ; Van Campo M. ; Waller M.P.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2014
卷: 10, 期: 2 起始页码: 681
结束页码: 686
语种: 英语
Scopus关键词: climate change
; climate conditions
; Holocene
; intertropical convergence zone
; paleobotany
; paleoclimate
; paleohydrology
; spatiotemporal analysis
; trade-off
; vegetation structure
; vulnerability
; water availability
; West Africa
英文摘要: Although past climate change is well documented in West Africa through instrumental records, modeling activities, and paleo-data, little is known about regional-scale ecosystem vulnerability and long-term impacts of climate on plant distribution and biodiversity. Here we use paleohydrological and paleobotanical data to discuss the relation between available surface water, monsoon rainfall and vegetation distribution in West Africa during the Holocene. The individual patterns of plant migration or community shifts in latitude are explained by differences among tolerance limits of species to rainfall amount and seasonality. Using the probability density function methodology, we show here that the widespread development of lakes, wetlands and rivers at the time of the "Green Sahara" played an additional role in forming a network of topographically defined water availability, allowing for tropical plants to migrate north from 15 to 24° N (reached ca. 9 cal ka BP). The analysis of the spatio-temporal changes in biodiversity, through both pollen occurrence and richness, shows that the core of the tropical rainbelt associated with the Intertropical Convergence Zone was centered at 15-20° N during the early Holocene wet period, with comparatively drier/more seasonal climate conditions south of 15° N. © 2014 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49288
Appears in Collections: 气候变化与战略
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Recommended Citation:
Hély C.,Lézine A.-M.,Ballouche A.,et al. Holocene changes in African vegetation: Tradeoff between climate and water availability[J]. Climate of the Past,2014-01-01,10(2)