DOI: 10.1038/s41561-021-00777-2
论文题名: Dry corridors opened by fire and low CO2 in Amazonian rainforest during the Last Glacial Maximum
作者: Sato H. ; Kelley D.I. ; Mayor S.J. ; Martin Calvo M. ; Cowling S.A. ; Prentice I.C.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2021
卷: 14, 期: 8 起始页码: 578
结束页码: 585
语种: 英语
英文摘要: The dynamics of Amazonian rainforest over long timescales connect closely to its rich biodiversity. While palaeoecological studies have suggested its stability through the Pleistocene, palaeontological evidence indicates the past existence of major expansions of savannah and grassland. Here we present integrated modelling evidence for a grassier Neotropics during the Last Glacial Maximum, congruent with palaeoecological and biological studies. Vegetation reconstructions were generated using the land processes and exchanges model, driven by model reconstructions of Last Glacial Maximum climate, and compared with palynological data. A factorial experiment was performed to quantify the impacts of fire and low CO2 on vegetation and model–data agreement. Fire and low CO2 both individually and interactively induced widespread expansion of savannah and grassland biomes while improving model–data agreement. The interactive effects of fire and low CO2 induced the greatest ‘savannafication’ of the Neotropics, providing integrated evidence for a number of biogeographically relevant open vegetation formations, including two dry corridors (paths of savannah and grassland through and around Amazonia that facilitated major dispersal and evolutionary diversification events). Our results show a bimodality in tree cover that was driven by fire and further enhanced by ‘CO2 deprivation’, which suggests biome instability in this region of climate space. © 2021, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169811
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth Sciences, University of Toronto, Toronto, ON, Canada; UK Centre for Ecology & Hydrology, Wallingford, United Kingdom; Florida Museum of Natural History, University of Florida, Gainesville, FL, United States; Ontario Forest Research Institute, Ontario Ministry of Natural Resources and Forestry, Sault Ste. Marie, ON, Canada; Georgina Mace Centre for the Living Planet, Department of Life Sciences, Imperial College London, London, United Kingdom
Recommended Citation:
Sato H.,Kelley D.I.,Mayor S.J.,et al. Dry corridors opened by fire and low CO2 in Amazonian rainforest during the Last Glacial Maximum[J]. Nature Geoscience,2021-01-01,14(8)