在宏观藻类分解过程中,微生物驱动的有机碳降解和营养循环
Tao Zhang1, Huanping Liu1, Zhenyu Huang1
1School of Environmental Science and Engineering/Agriculture and Biotechnology/Marine Sciences, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong Provincial Observation and Research Station for Marine Ranching in Lingdingyang Bay, China-ASEAN Belt and Road Joint Laboratory on Mariculture Technology, State Key Laboratory for Biocontrol, Sun Yat-sen University, Guangzhou 510006, China.
Environmental science & technology
|January 17, 2026
概括
海洋微生物从腐烂的大藻中降解有机碳 (OC),影响沿海蓝色碳. 这项研究揭示了微生物过程和关键的碳降解物种,这些物种在分解过程中参与营养循环.
科学领域:
- 海洋微生物生态学
- 生物地质化学生物地质化学
- 沿海生态系统的过程.
背景情况:
- 宏观藻类的开花释放有机碳 (OC) 和营养物质,可能会影响蓝色碳的捕获.
- 海洋微生物对于大藻衰变期间的OC降解至关重要,但机制尚未完全理解.
研究的目的:
- 通过使用多组学来研究在宏藻分解期间OC降解和营养循环的微生物调节.
- 确定关键的微生物参与者和参与分解大藻生物质的代谢途径.
主要方法:
- 综合的多组学:安普利康序列,元基因组学和元转录组学.
- 分析带有和没有分解的海岸沉积物 * Sargassaceae *.
- 测量细胞外酶活动和环境驱动因素 (C/N比,DOC,TDN,NO3-).
主要成果:
- 腐烂Sargassaceae增加了沉积物总碳超过33%,并减少了微生物的α-多样性.
- 调节OC降解,碳水化合物代谢,酸盐降解,和硫代谢途径.
- 主要的OC降解物被确定为*Vibrio*,*Pseudoalteromonas*,*Alteromonas*和*Exiguobacterium_A*,富含酸盐和硫酸盐的降解途径.
- 环境因素,如C/N比率和营养度塑造了微生物的新陈代谢.
结论:
- 微生物驱动的OC降解是一个关键的过程,在藻分解期间与营养循环相结合.
- 这项研究促进了对微生物碳处理和沿海生态系统中的生物地化学联系的机制性理解.
- 这些发现突出了特定微生物种群在宏藻碳循环和营养动态中的作用.
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