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植物浮游生物直接释放反抗性溶解有机碳作为海洋碳封存的隐藏途径

Xiuting Feng^1,2, Hanshuang Zhao¹, Zenghu Zhang¹

¹Qingdao New Energy Shandong Laboratory, Shandong Energy Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China.

Environmental science & technology

|January 14, 2026

概括

植物浮游生物,就像藻一样,直接释放抗生性溶解有机碳 (RDOC),它抵抗微生物分解. 这一以前未知的来源对海洋长期存储碳有着显著的贡献.

科学领域:

海洋生物地质化学海洋生物地质化学
海洋学海洋学海洋学
植物浮游生物生态学生态学

背景情况:

重温性溶解有机碳 (RDOC) 是一个主要的海洋碳储库.
微生物碳是RDOC形成的主要假设途径.
植物浮游生物对RDOC的直接贡献以前没有被调查过.

研究的目的:

调查植物浮游生物是否可以直接产生RDOC.
描述藻释放的RDOC的性质和流行情况.
估计直接植物浮游生物RDOC生产对全球海洋碳储存的贡献.

主要方法:

培养了两种对比的藻物种 (Phaeodactylum tricornutum和Chaetoceros sp. DS1).1) 在这个问题上.
测量藻释放的生物耐火溶解有机碳 (DOC).
释放的DOC的分子特征和与全球海洋DOC数据的比较.

主要成果:

藻内在释放RDOC,释放的DOC中有21-36%是生物折射性.
原子释放的RDOC富含含硫的化合物,并且在分子上与微生物加工的RDOC不同.
在全球范围内发现了藻释放的RDOC的签名,从地表到深水域.

结论:

植物浮游生物是海洋RDOC的直接,重大贡献者.
藻直接产生的RDOC产量代表了一个相当大的,被低估的海洋碳汇.
这些发现扩大了海洋碳捕获和微生物碳的概念框架.

关键词:

藻类是一种藻类.海洋植物浮游生物海洋植物浮游生物微生物碳是微生物的碳.海洋碳封存海洋碳封存再燃性溶解有机碳 (RDOC) 的使用

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