气候变化领域集成服务门户(CCPortal): Forest; fire & monsoon: investigating the long-term threshold dynamics of south-east Asia's seasonally dry tropical forests

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DOI	10.1016/j.quascirev.2020.106334
	Forest; fire & monsoon: investigating the long-term threshold dynamics of south-east Asia's seasonally dry tropical forests
	Hamilton R.; Penny D.; Hall T.L.
发表日期	2020
ISSN	0277-3791
卷号	238
英文摘要	Tropical forests are the most biodiverse terrestrial ecosystems on earth, yet are particularly susceptible to future climatic and human-induced change. Identifying tipping points at which tropical ecosystems will reorganise is therefore an important research goal. Limited research within the seasonally dry tropical forests of south-east Asia means that much uncertainty exists around the resilience of these systems to future global change. This is a critical research gap because these forests should – given their physiognomic attributes, current bioclimatic envelope and the range of stressors – be very sensitive to a stable-state shift to savanna. Here we adopt a palaeoecological approach to examine the interaction between key drivers of change (decreased precipitation and heightened fire activity) and forest response over ∼4700 years though interrogation of sediment-based proxies from volcanic crater lakes within north-east Cambodia – in the core range of southeast Asia's tropical dry forests. Our results suggest that rapidly regenerating, secondary forest taxa are important for maintaining a forested state when the landscape is subject to moderate fire and climatic disturbance. However, when these stressors are amplified, recovery and resistance traits associated with key deciduous dipterocarp forest taxa appear critical for forest stability. Notably, shifts from more closed, seasonal evergreen forest formations to more open secondary/deciduous dipterocarp formations appear reversible when the stressors are removed, suggesting that these transitions are not analogous with the difficult-to-reverse, forest-to-savanna stable state shifts that occur elsewhere in Neotropical and Afrotropical settings. Our results indicate that the resilience of south-east Asian forests to climatic forcing appears contingent on the maintenance of secondary forest, deciduous forest, and seasonal evergreen dry forest mosaics across the ecoregion. This has implications for the conservation and wise-use of mainland south-east Asia's lowland dry forests. © 2020 Elsevier Ltd
英文关键词	Asian monsoon; Charcoal analysis; Dry dipterocarp forest; Fire regime; Lake sediments; Mixed deciduous forest; Monsoon forest; Sunda; Tropical palynology; Tropical savanna
语种	英语
scopus关键词	Ecosystems; Tropics; Bioclimatic envelopes; Critical researches; Seasonally dry tropical forests; Secondary forests; Terrestrial ecosystems; Threshold dynamics; Tropical dry forest; Tropical ecosystems; Reforestation; Afrotropical Region; anthropogenic effect; dry forest; forest fire; global change; long-term change; monsoon; Neotropic Ecozone; seasonal variation; secondary forest; threshold; tropical forest; Cambodia
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151465
作者单位	Department of Archaeology, Max Planck Institute for the Science of Human History, Jena, 07745, Germany; School of Geosciences, The University of SydneyNSW 2006, Australia
推荐引用方式 GB/T 7714	Hamilton R.,Penny D.,Hall T.L.. Forest; fire & monsoon: investigating the long-term threshold dynamics of south-east Asia's seasonally dry tropical forests[J],2020,238.
APA	Hamilton R.,Penny D.,&Hall T.L..(2020).Forest; fire & monsoon: investigating the long-term threshold dynamics of south-east Asia's seasonally dry tropical forests.Quaternary Science Reviews,238.
MLA	Hamilton R.,et al."Forest; fire & monsoon: investigating the long-term threshold dynamics of south-east Asia's seasonally dry tropical forests".Quaternary Science Reviews 238(2020).