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短期和长期过程对开放海洋和沿海系统中的SAR11社区的影响

Luis M Bolaños¹, Karen Tait², Paul J Somerfield²

¹School of Biosciences, University of Exeter, Exeter, UK. l.bolanos-avellaneda@exeter.ac.uk.

ISME communications

|November 8, 2023

概括

对于海洋碳循环至关重要的SAR11细菌在北大西洋表现出明显的季节性模式. 环境的变化,如风的混合,可以破坏它们可预测的年度进展.

科学领域:

海洋微生物学海洋微生物学
海洋学海洋学海洋学
生物地质化学循环是什么

背景情况:

SAR11细菌在海洋表面丰富,在全球碳循环中发挥着关键作用.
这种细菌分类包括多样化的生态型,具有专门的利基和独特的空间和时间分布.

研究的目的:

在两个对比的北大西洋海洋环境中研究SAR11生态型的季节性动态.
了解影响SAR11生态型继承和周期性的环境因素.

主要方法:

对来自萨尔加索海 (BATS) 和英吉利海峡西部 (WEC) 的长期16S rRNA amplicon时间序列数据的分析.
利用基因组学解析的安普利康序列变异 (ASVs) 来追踪生态型变化.
检查了WEC在两年内与环境波动相关的每周社区变化.

主要成果:

在两个地点都观察到SAR11生态型的持续季节性继承,夏季和冬季社区组成不同.
生态型Ia.3主导夏季社区,而冬季社区在不同地点不同 (例如,BATS的Ib和IIa.A;WEC的Ia.1和IIa.B).
年间的天气变化,特别是2015年的强风,导致了逐渐的,脱的社区转移,与2016年的突然,同步的转移形成鲜明对比.

结论:

SAR11生态型的继承遵循着可预测的季节性模式,受环境条件的影响.
SAR11季节性进展的速度可能会因年间的天气变化和短期的环境波动而发生重大变化.

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