DOI: 10.1016/j.quascirev.2015.05.032
Scopus记录号: 2-s2.0-84935899900
论文题名: New insights on palaeofires and savannisation in northern SouthAmerica
作者: Rull V. ; Montoya E. ; Vegas-Vilarrúbia T. ; Ballesteros T.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 122 起始页码: 158
结束页码: 165
语种: 英语
英文关键词: Conservation
; Fire
; Neotropics
; Rainforests
; Savannas
; Savannisation
; South American settlers
; Younger Dryas
Scopus关键词: Conservation
; Ecology
; Forestry
; Vegetation
; Neotropics
; Rainforests
; Savannas
; Savannisation
; South American settlers
; Younger Dryas
; Fires
; conservation management
; fire behavior
; Holocene
; human activity
; landscape
; migration
; Neotropical Region
; paleoecology
; rainforest
; savanna
; tropical environment
; vegetation dynamics
; vegetation structure
; Younger Dryas
; Conservation
; Fires
; Forests
; Amazonia
; Bolivar [Venezuela]
; Gran Sabana
; Orinoco Basin
; Venezuela
英文摘要: Understanding the origin and ecological dynamics of tropical savannas in terms of natural and human drivers of change is a hot topic that may be crucial for conservation. The case of the Gran Sabana (GS), a huge savanna island within the Amazon-Orinoco rainforests, is presented as a pilot study for the Neotropics. A vivid debate exists on whether or not forests formerly covered the GS and on the potential role of anthropogenic fires in the establishment of present-day savannas. This debate has generated a conflict between conservation ecologists defending the ancient forests hypothesis and indigenous inhabitants (Pemones), for whom the use of fire is an inalienable cultural trait. Here we discuss the latest palaeoecological findings documenting past vegetation dynamics and the shaping of present GS landscapes. At the beginning of the Younger Dryas (YD), the GS was more forested than it is today but an abrupt, hitherto irreversible, shift toward savannisation, likely caused by coupled climate-fire synergies, was recorded between the mid-YD and the Early Holocene. It is suggested that fires could have been ignited by the first South American settlers in their eastward migration from the Panama Isthmus through the so called Atlantic Route. The Pemones would have established in the GS during the Late Holocene when savannas already covered the region. A simplistic debate between either forest or savanna as the "original" GS vegetation is unrealistic and should be replaced by a more dynamic approach. The term "original" vegetation itself is misleading and should not be used. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59882
Appears in Collections: 过去全球变化的重建
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作者单位: Institute of Earth Sciences Jaume Almera (ICTJA-CSIC), C. Lluís Solé-Sabarís s/n, Barcelona, Spain; Department of Environment, Earth and Ecosystems, The Open University, Walton Hall, Milton Keynes, United Kingdom; Department of Ecology, University of Barcelona, Av. Diagonal 643, Barcelona, Spain
Recommended Citation:
Rull V.,Montoya E.,Vegas-Vilarrúbia T.,et al. New insights on palaeofires and savannisation in northern SouthAmerica[J]. Quaternary Science Reviews,2015-01-01,122