种植区的DOM和微生物群落的空间分布特征和相互作用效应
Huiling Huang1, Shuaijun Zan2, Kuishuang Shao3
1College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai, China; State Environmental Protection Key Laboratory of Coastal Ecosystem, National Marine Environmental Monitoring Center, Dalian, China.
The Science of the total environment
|February 3, 2024
概括
海藻养殖显著增加了溶解的有机碳,改变了微生物功能和海洋沉积物中的碳循环. 来自海藻的不稳定有机物增强了反复的碳降解,可能会促进碳封存.
科学领域:
- 海洋微生物生态学
- 生物地质化学生物地质化学
- 水产养殖科学 水产养殖科学
背景情况:
- 大藻种植通过微生物碳影响海洋碳汇.
- 在沉积物-水界面上的溶解有机物 (DOM) 交换对全球元素循环至关重要.
- 在海藻养殖场中,DOM,细菌和微生物功能之间的相互作用仍未得到充分探索.
研究的目的:
- 分析海藻 (Saccharina japonica) 种植区的DOM特征和细菌群落.
- 为了将它们与非耕种地区进行比较.
- 预测与养殖场沉积物中的碳循环相关的微生物功能.
主要方法:
- 在种植和非种植地区进行现场采样.
- 使用EEM-PARAFAC.使用溶解有机碳 (DOC) 和DOM组成的分析.
- 通过16S rRNA基因测序和功能基因预测进行细菌社区结构分析.
主要成果:
- 鱼种植区的DOC显著增加,特别是在地表和上层水域.
- 细菌群落不同,Desulfobacterota在培养沉积物中更为普遍.
- 确定了一种反复的DOM成分 (C2);微生物功能,如甲醇氧化和C,N,S循环在培养沉积物中更活跃,硫酸盐减少和脱是关键.
结论:
- Kelp 种植改变了 DOM 池,并增强了沉积物碳循环中的微生物活动.
- 观察到一个DOM原始化效应,其中来自海藻的不稳定有机物加速了强的DOM降解.
- 这一过程可能会增强海藻养殖环境中的碳捕集.
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