有机物组成的波动破坏了自由生活的细菌群落,而不是沿海水域的与粒子相关的细菌群落
Shujing Liu1, Quanrui Chen1, Le Liu1
1State Key Laboratory of Marine Environmental Science, Fujian Key Laboratory of Marine Carbon Sequestration, College of Ocean and Earth Sciences, Xiamen University, China.
The Science of the total environment
|July 25, 2024
概括
海洋细菌,无论是自由存在的 (FL) 还是与粒子相关的 (PA),都对不断变化的有机物有不同的反应. 在藻开花期间,FL社区对溶解有机物 (DOM) 组成的敏感性更高.
科学领域:
- 海洋微生物学 海洋微生物学
- 生物地质化学生物地质化学
- 微生物生态学 微生物生态学
背景情况:
- 海洋有机物对微生物生长至关重要,并塑造了参与其分解的细菌群落.
- 自由生活 (FL) 和粒子相关 (PA) 细菌群落对演化中的溶解有机物 (DOM) 和颗粒有机物 (POM) 池的独特反应需要进一步研究.
研究的目的:
- 研究沿海水域大小分化的细菌群落,DOM和POM的组成.
- 了解细菌群体在22天内对藻开花的反应中的动态.
主要方法:
- 细菌群体的大小分成部分.
- 溶解有机物 (DOM) 和有机颗粒物 (POM) 组成的分析.
- 同时发生的网络分析以评估社区的稳定性.
主要成果:
- 与粒子相关 (PA) 社区相比,自由生活 (FL) 细菌群体的稳定性明显较低.
- 藻的开花导致DOM分子增加,特别是氨基酸和,而POM成分保持稳定.
- 细菌的α-多样性与有机物池大小负相关,而β-多样性与有机物组成有关.
结论:
- 细菌群体的组成受到有机物质的可用性和结构的强烈影响.
- 自由生活 (FL) 细菌表现出比PA细菌更大的时间变异性和对特定DOM分子的更高敏感性.
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