气候变化领域集成服务门户(CCPortal): Wetland expansion on the continental shelf of the northern South China Sea during deglacial sea level rise

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DOI	10.1016/j.quascirev.2020.106202
	Wetland expansion on the continental shelf of the northern South China Sea during deglacial sea level rise
	Chen Y.; Huang E.; Schefuß E.; Mohtadi M.; Steinke S.; Liu J.; Martínez-Méndez G.; Tian J.
发表日期	2020
ISSN	0277-3791
卷号	231
英文摘要	To identify environmental causes for past changes in vegetation in subtropical East Asia, we present carbon isotope compositions of plant-wax n-alkanes and provide estimates of the C4-plant contribution across the past four glacial terminations and interglacials, based on cores recovered from the northern South China Sea. Our results show a comparable C4-plant contribution between the Last Glacial Maximum (LGM) and the Holocene. An increase of the C4-plant contribution by 15–20% is found for Terminations IV, II and I relative to subsequent interglacial peaks, coeval with an expansion of Cyperaceae and Poaceae. In contrast, Termination V reveals a lower C4-plant contribution than Marine Isotope Stage (MIS) 11c. The data exhibit a long-term trend, with a stepwise increase of the C4-plant contribution across interglacials MIS 11c, 9e, 7e and 1. We suggest that no substantial changes in humidity levels over glacial-interglacial cycles occurred facilitating a similar C3/C4-plant ratio for the LGM and the Holocene. Instead, deglacial sea-level rises caused an extensive development of floodplains and wetlands on the exposed continental shelf, providing habitats for the spread of C4 sedges and grasses. The progressive subsidence of Chinese coastal areas and the broadening of the continental shelf over the late Quaternary explains the nearly absence of C4 plant occurrence during Termination V and a gradual increase of the C4-plant contribution across interglacial peaks. Taken together, changes in coastal environments should be considered when interpreting marine-based vegetation reconstructions from subtropical Asia. © 2020 Elsevier Ltd
英文关键词	Coastal environments; Compound-specific carbon isotopes; East Asian monsoon; Plant-wax lipids; Vegetation composition
语种	英语
scopus关键词	Coastal zones; Expansion; Glacial geology; Isotopes; Paraffins; Sea level; Tropics; Vegetation; Wetlands; Carbon isotope composition; Carbon isotopes; Coastal environments; East Asian monsoon; Glacial-interglacial cycles; Marine isotope stages; Northern South China Sea; Vegetation composition; Plant expansion; carbon isotope; coastal zone; continental shelf; deglaciation; glacial-interglacial cycle; grass; Holocene; interglacial; Last Glacial Maximum; lipid; monsoon; Quaternary; sea level change; sedge; wetland; Far East; Pacific Ocean; South China Sea; Carex; Cyperaceae; Poaceae
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/151573
作者单位	State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China; MARUM - Center for Marine Environmental Sciences, University of Bremen, Bremen, 28359, Germany; Department of Geological Oceanography and State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, Bremerhaven, 27568, Germany
推荐引用方式 GB/T 7714	Chen Y.,Huang E.,Schefuß E.,et al. Wetland expansion on the continental shelf of the northern South China Sea during deglacial sea level rise[J],2020,231.
APA	Chen Y..,Huang E..,Schefuß E..,Mohtadi M..,Steinke S..,...&Tian J..(2020).Wetland expansion on the continental shelf of the northern South China Sea during deglacial sea level rise.Quaternary Science Reviews,231.
MLA	Chen Y.,et al."Wetland expansion on the continental shelf of the northern South China Sea during deglacial sea level rise".Quaternary Science Reviews 231(2020).