Coastal redox shifts over the past 167 years and preservation of total organic carbon and total nitrogen

文献类型： 外文期刊

第一作者： Gu, Yang-Guang

作者： Gu, Yang-Guang;Li, Hai-Song;Gu, Yang-Guang;Gu, Yang-Guang;Jordan, Richard W.;Su, Hong;Liang, Rui-Ze;Gu, Yang-Guang;Jiang, Shi-Jun

作者机构：

关键词： Sediment core; Redox condition; TOC preservation; TN preservation; Cu/Zn ratio; Xincun Lagoon

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：4.9； 五年影响因子：5.6 ）

ISSN： 0025-326X

年卷期： 2025 年 212 卷

页码：

收录情况： SCI

摘要： This study reconstructs the environmental history of Xincun Lagoon over the past 167 years using sediment core XCW, employing Cu/Zn as a proxy for redox changes. Time-series analysis of Cu/Zn ratios reveals a significant decline (linear regression slope = -0.00082, p < 0.001; Mann-Kendall tau = -0.601, p < 0.001), indicating a steady reduction in redox potential and oxygen levels throughout the study period. This trend is attributed to anthropogenic activities, eutrophication, and climate-induced changes. Additionally, correlation analysis highlights strong linear relationships between Cu/Zn ratios and both total organic carbon (TOC) and total nitrogen (TN), emphasizing the role of redox conditions in the preservation of TOC and TN in lagoon sediments. The study also identifies a shift in organic matter sources from predominantly marine to a mix of marine and terrestrial inputs after 1990. These findings offer new insights into the interplay between redox dynamics and sedimentary processes, advancing our understanding of the lagoon's environmental evolution.

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