气候变化领域集成服务门户(CCPortal): Abundance and δ13C of sedimentary black carbon indicate rising wildfire and C4 plants in Northeast China during the early Holocene

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DOI	10.1016/j.palaeo.2020.110075
	Abundance and δ13C of sedimentary black carbon indicate rising wildfire and C4 plants in Northeast China during the early Holocene
	Pang Y.; Zhou B.; Zhou X.; Xu X.; Liu X.; Zhan T.; Lu Y.
发表日期	2020
ISSN	0031-0182
英文摘要	Global warming and human activity are thought to be the primary drivers of the globally rising occurrences of forest fires. Due to the importance of local to regional environmental drivers in mediating fire frequencies, reconstructing fire histories of representative geographic regions is important to understand fire regimes and predict future changes. The present study aims to establish a relatively high-resolution fire record of boreal forests in northeastern (NE) China and identify the primary environmental drivers. We analyzed the concentration and stable carbon isotopic composition of black carbon (BC and δ13CBC) of a 34,000 cal yr BP sedimentary sequence from a crater lake (Tianchi). The results show that fire events and C4 plants were scarce during the late Last Glacial but increased since the deglaciation. Both fire and the abundance of combusted C4 plants reached their maxima during the early Holocene, which may be attributed to rising temperatures due to intensified solar radiation and summer monsoons. During mid-to-late Holocene, fire events remained relatively stable and were primary associated with C3 plants burning. Fire was particularly infrequent and C3 trees were abundant during the periods of 5500–3100 cal yr BP and 1500–150 cal yr BP, which can be attributed to a wet climate. Fires exhibited evident increases from 150 cal yr BP to the present, suggesting a substantial role of human activities. Both BC and δ13CBC during the Holocene show a significant correlation with pollen-based temperatures but not with precipitation, suggesting that temperature rises played a primary role in stimulating forest fires via mediating effective moisture. Collectively, these findings suggest that forest fires and C4 plants would likely increase in NE China in response to global warming and increasingly intensive anthropogenic disturbance, highlighting the importance of establishing a long-term understanding of fire regimes to create more sustainable, science-based fire management strategies. © 2020 Elsevier B.V.
英文关键词	Asian summer monsoon; Carbon isotope; Fire history; Pyrogenic carbon; Vegetation changes; Wudalianchi
语种	英语
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150696
作者单位	Key Laboratory of Surficial Geochemistry (Ministry of Education), School of Earth Sciences and Engineering, Nanjing University, Nanjing, 210046, China; Institute of Polar Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, 230026, China; The Second Hydrogeology and Engineering Geology Prospecting Institute of Heilongjiang Province, Harbin, 150030, China; Molecular Eco-Geochemistry Laboratory, Department of Geological Science, The University of Alabama, Tuscaloosa, AL 35487, United States
推荐引用方式 GB/T 7714	Pang Y.,Zhou B.,Zhou X.,et al. Abundance and δ13C of sedimentary black carbon indicate rising wildfire and C4 plants in Northeast China during the early Holocene[J],2020.
APA	Pang Y..,Zhou B..,Zhou X..,Xu X..,Liu X..,...&Lu Y..(2020).Abundance and δ13C of sedimentary black carbon indicate rising wildfire and C4 plants in Northeast China during the early Holocene.Palaeogeography, Palaeoclimatology, Palaeoecology.
MLA	Pang Y.,et al."Abundance and δ13C of sedimentary black carbon indicate rising wildfire and C4 plants in Northeast China during the early Holocene".Palaeogeography, Palaeoclimatology, Palaeoecology (2020).