Source and composition of sedimentary organic matter in the head of Three Gorges Reservoir: a multip

• 作者: He Ding Changfeng Zhu Kai Zhang Shangbin Xiao Xingqian Cui Yongge Sun
• 学科: 地球科学
• 关键词: Three Gorges reservior Sedimentary organic matter δ13C Lignin phenols Lipid biomarkers
• 年，卷（期）: 2022,（3）
• 页码范围: 452-455
• 页数: 3页
• 语种: 英文
• DOI: 10.1007/s11631-017-0189-8

摘要

A multiproxy approach including bulk organic carbon, δ13C, lignin phenols, and lipid biomarker analyses were applied to characterize the source and composition of sedimentary organic matter in the head part of Three Gorges Reservoir. OM consisted of both natural (autochthonous and allochthonous) and anthropogenic inputs. The natural OM included input from vascular plants, especially non-woody angiosperms. The allochthonous input included plankton and microbial production, likely due to localized eutrophication. Anthropogenic inputs likely derived from petroleum input and/or urban activities. Other anthropogenic inputs were untreated sewage waste. These influences were concluded to be regionally specific point sources of pollution based on relative distributions and on the fact that molecular characteristics of sedimentary OM were not distributed smoothly along a gradient.