干旱区生态环境知识资源中心(Arid): Karst-ecological changes during the middle and late Holocene in Southwest China revealed by δ18O and δ13C records in a stalagmite

Arid

DOI	10.1016/j.palaeo.2023.111437
	Karst-ecological changes during the middle and late Holocene in Southwest China revealed by δ18O and δ13C records in a stalagmite
	Duan, Rong; Li, Ting-Yong; Li, Jun-Yun; Spoetl, Christoph; Li, Hong-Chun; Wang, Hai-Bo; Cheng, Hai; Ning, You-Feng; Shen, Chuan-Chou; Zhou, Jing-Li; Chen, Chao-Jun; Yu, Tsai-Luen; Edwards, R. Lawrence; Liu, Zi-Qi
通讯作者	Li, TY
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2023
卷号	615
英文摘要	Rocky desertification is a major environmental problem in the karst regions of Southwest China and seriously impacts ecological and socioeconomic development. Human activities and climate change have been proposed as the main factors responsible for the development and expansion of rocky desertification, but more evidence is needed to support this hypothesis. In this study, the history of the Asian summer monsoon (ASM) since 6200 yr BP is reconstructed based on 230Th dating and delta O-18 and delta C-13 data of a stalagmite from Feilong Cave in Guizhou Province of Southwest China. Positive delta O-18 and delta C-13 excursions record eleven interdecadal-centennial weak summer monsoon events at 1000-870, 1660-1460, 2040-1900, 2780-2460, 3020-2860, 3250-3120, 3650-3370, 4273-3980, 4820-4480, 5370-5180, and 5840-5560 yr BP. These weak ASM events were controlled by a southward shift of the Intertropical Convergence Zone and frequent El Ni (n) over tildeo events. Changes in the delta C-13 values of this stalagmite were mainly driven by changes in vegetation coverage and type, soil microbial activity, and regional hydrogeological conditions. The simultaneous positive excursions of delta O-18 and delta C-13 at similar to 5500, 4200, and 2800 yr BP indicate a degradation of the karst ecological environment in response to the weak summer monsoon. In addition, frequent dynasty changes in China since 3000 yr BP profoundly influenced the karst ecological environment. During the Medieval Warm Period, the Jing-Kang event (JK event) resulted in the fall of the Northern Song Dynasty and led to a large-scale migration into southern China. As a consequence, the population increase in the Yangtze River basin enhanced land use, accelerated the disappearance of forests, and finally resulted in the deterioration of the regional environment. We conclude that climate change and anthropogenic activity may have jointly triggered and/or exacerbated rocky desertification in Southwest China.
英文关键词	Middle and late Holocene Speleothems Asian summer monsoon Karst Societal changes
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000995344300001
WOS关键词	ASIAN SUMMER MONSOON ; STABLE-ISOTOPE VARIATIONS ; CAVE DRIP WATER ; HIGH-RESOLUTION ; LATE PLEISTOCENE ; INDIAN MONSOON ; NORTH-ATLANTIC ; CLIMATE-CHANGE ; EL-NINO ; SPELEOTHEMS
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397956
推荐引用方式 GB/T 7714	Duan, Rong,Li, Ting-Yong,Li, Jun-Yun,et al. Karst-ecological changes during the middle and late Holocene in Southwest China revealed by δ18O and δ13C records in a stalagmite[J],2023,615.
APA	Duan, Rong.,Li, Ting-Yong.,Li, Jun-Yun.,Spoetl, Christoph.,Li, Hong-Chun.,...&Liu, Zi-Qi.(2023).Karst-ecological changes during the middle and late Holocene in Southwest China revealed by δ18O and δ13C records in a stalagmite.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,615.
MLA	Duan, Rong,et al."Karst-ecological changes during the middle and late Holocene in Southwest China revealed by δ18O and δ13C records in a stalagmite".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 615(2023).