中国水产科学研究院机构知识库

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

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文献类型：外文期刊

作者： Gu, Yang-Guang ¹ ; Li, Hai-Song ¹ ; Su, Hong ⁴ ; Jordan, Richard W. ³ ; Liang, Rui-Ze ⁵ ; Jiang, Shi-Jun ⁷ ;

作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China

2.Sanya Trop Fisheries Res Inst, Sanya 572025, Peoples R China

3.Yamagata Univ, Fac Sci, Yamagata 9908560, Japan

4.Jinan Univ, Coll Life Sci & Technol, Guangzhou 510632, Peoples R China

5.Hohai Univ, Coll Oceanog, Nanjing 245700, Peoples R China

6.Key Lab Fishery Ecol & Environm, Guangzhou 510300, Guangdong, Peoples R China

7.Hainan Univ, State Key Lab Marine Resource Utilizat South China, Haikou 570228, Peoples R China

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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