DOI: 10.1016/j.palaeo.2015.08.007
论文题名: δ13Corg and n-alkane evidence for changing wetland conditions during a stable mid-late Holocene climate in the central Tibetan Plateau
作者: Cheung M.-C. ; Zong Y. ; Wang N. ; Aitchison J.C. ; Zheng Z.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 438 起始页码: 203
结束页码: 212
语种: 英语
英文关键词: Alpine wetland
; Monsoon climate change
; N-Alkane indices
; Organic carbon isotopes
; Tibetan Plateau
英文摘要: This study has examined bulk and compound specific organic carbon isotopes (δ13Corg) and lipid n-alkanes of modern plants and a wetland sediment sequence from the central Tibetan Plateau and explores the usefulness of these two methods for palaeoenvironmental reconstructions. Results show that a combination of δ13Corg values and n-alkane indices can help differentiate organic matter from C3 terrestrial plant, C4 terrestrial plant and submerged macrophytes, the three main sources of organic matter in the study area. The analyses of total organic carbon, δ13Corg values and n-alkane indices for the sediment sequence imply that a wetland habitat was established about 8000years ago, and the wetland conditions were largely stable with dominantly C3 wetland herbs covering the wetland. However, small fluctuations in the dominant organic matter supply between vascular and aquatic plants are revealed, suggesting short duration changes in the extent of open water area within the wetland or variations in the productivity of submerged macrophytes and aquatic plants within the wetland ecosystem, which reflects variations in the strength of precipitation and evaporation. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68805
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth Sciences, The University of Hong Kong, Hong Kong, China; Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou, China; School of Geography Planning and Environmental Management, The University of Queensland, Brisbane, QLD, Australia; Department of Earth Sciences, Sun Yat-Sen University, Guangzhou, China
Recommended Citation:
Cheung M.-C.,Zong Y.,Wang N.,et al. δ13Corg and n-alkane evidence for changing wetland conditions during a stable mid-late Holocene climate in the central Tibetan Plateau[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,438