The carbon transport mediated by the mild oxygen minimum zone (OMZ) in the seamount area of the Western Pacific

IF 3.2 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Marine environmental research Pub Date : 2025-02-01 DOI:10.1016/j.marenvres.2024.106916

Lilian Wen , Jun Ma , Xuegang Li , Jiajia Dai , Jinming Song , Qidong Wang , Kuidong Xu , Jianwei Xing , Baoxiao Qu , Guorong Zhong

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Abstract

This study analyzed the relationship between the oxygen minimum zone (OMZ) and various types of carbon, such as POC, DOC, and DIC, in the Y3 seamount area in the Western Pacific. The results indicated that the OMZ was located at 200–1000 m and a threshold of 100 μmol/kg was established for this area of the Western Pacific. The DOC and POC changed drastically out of OMZ while they were relatively stable within the OMZ due to the low oxygen. The rates of decrease in DOC and POC within the OMZ were significantly lower than those above the OMZ, indicating that the organic matter (OM) degradation rate within the OMZ was much lower than that above the OMZ. DIC maintained a continuously increasing trend with depth, but the DIC growth rate above, within, and below the OMZ decreased gradually. The controlling factors for the various types of carbon were different. POC was closely related to the decomposition of OM. The presence of recalcitrant organic carbon in DOC weakened the relationship between DOC and OM decomposition, and DIC components were complex and related to biological activity, temperature, and carbonate manifestation. This study explored the distribution of various types of carbon in the Western Pacific, providing support for studying the marine carbon cycle under a low-oxygen background.

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西太平洋海底山区轻度氧最小带（OMZ）介导的碳输运。

本研究分析了西太平洋Y3海山区氧最小带（OMZ）与POC、DOC、DIC等各类碳的关系。结果表明，该海域的OMZ分布在200 ~ 1000 m，阈值为100 μmol/kg。DOC和POC在OMZ外变化剧烈，而它们在OMZ内由于低氧而相对稳定。土壤有机质降解速率明显低于土壤有机质降解速率，土壤有机质降解速率明显低于土壤有机质降解速率，土壤有机质降解速率明显低于土壤有机质降解速率。DIC随深度持续增加，但在OMZ上、OMZ内和OMZ以下DIC的增长率逐渐下降。不同类型碳的控制因素不同。POC与OM的分解密切相关。DOC中顽固性有机碳的存在削弱了DOC与OM分解之间的关系，DIC组分复杂且与生物活性、温度和碳酸盐表现有关。本研究探讨了西太平洋各类型碳的分布，为研究低氧背景下的海洋碳循环提供了支持。

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来源期刊

Marine environmental research 环境科学-毒理学

CiteScore

5.90

自引率

3.00%

发文量

217

审稿时长

46 days

期刊介绍： Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.