气候变化领域集成服务门户(CCPortal): Forest mosaics, not savanna corridors, dominated in Southeast Asia during the Last Glacial Maximum

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DOI	10.1073/pnas.2311280120
	Forest mosaics, not savanna corridors, dominated in Southeast Asia during the Last Glacial Maximum
	Hamilton, Rebecca; Amano, Noel; Bradshaw, Corey J. A.; Saltre, Frederik; Patalano, Robert; Penny, Dan; Stevenson, Janelle; Wolfhagen, Jesse; Roberts, Patrick
发表日期	2024
ISSN	0027-8424
EISSN	1091-6490
起始页码	121
结束页码	1
卷号	121 期号:1
英文摘要	The dominant paradigm is that large tracts of Southeast Asia's lowland rainforests were replaced with a savanna corridor during the cooler, more seasonal climates of the Last Glacial Maximum (LGM) (23,000 to 19,000 y ago). This interpretation has implications for understanding the resilience of Asia's tropical forests to projected climate change, implying a vulnerability to savannization. A savanna corridor is also an important foundation for archaeological interpretations of how humans moved through and settled insular Southeast Asia and Australia. Yet an up-to-date, multiproxy, and empirical examination of the palaeoecological evidence for this corridor is lacking. We conducted qualitative and statistical analyses of 59 palaeoecological records across Southeast Asia to test the evidence for LGM savannization and clarify the relationships between methods, biogeography, and ecological change in the region from the start of Late Glacial Period (119,000 y ago) to the present. The pollen records typically show montane forest persistence during the LGM, while delta C-13 biomarker proxies indicate the expansion of C-4-rich grasslands. We reconcile this discrepancy by hypothesizing the expansion of montane forest in the uplands and replacement of rainforest with seasonally dry tropical forest in the lowlands. We also find that smooth forest transitions between 34,000 and 2,000 y ago point to the capacity of Southeast Asia's ecosystems both to resist and recover from climate stressors, suggesting resilience to savannization. Finally, the timing of ecological change observed in our combined datasets indicates an 'early' onset of the LGM in Southeast Asia from similar to 30,000 y ago.
英文关键词	grassland; palaeoenvironmental change; ecological regime shift; monsoon forest
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001200652900001
来源期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299796
作者单位	University of Sydney; Flinders University South Australia; Bryant University; Australian National University; Purdue University System; Purdue University; University of the Philippines System; University of the Philippines Diliman
推荐引用方式 GB/T 7714	Hamilton, Rebecca,Amano, Noel,Bradshaw, Corey J. A.,et al. Forest mosaics, not savanna corridors, dominated in Southeast Asia during the Last Glacial Maximum[J],2024,121(1).
APA	Hamilton, Rebecca.,Amano, Noel.,Bradshaw, Corey J. A..,Saltre, Frederik.,Patalano, Robert.,...&Roberts, Patrick.(2024).Forest mosaics, not savanna corridors, dominated in Southeast Asia during the Last Glacial Maximum.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,121(1).
MLA	Hamilton, Rebecca,et al."Forest mosaics, not savanna corridors, dominated in Southeast Asia during the Last Glacial Maximum".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 121.1(2024).