上下监管对淡水细菌浮游生物生长效率的影响
Angia Sriram Pradeep Ram1, Hermine Billard1, Fanny Perriere1
1Laboratoire Microorganismes: Génome et Environnement, UMR CNRS 6023, Université Clermont-Auvergne, 63000 Clermont-Ferrand, France.
Microorganisms
|October 26, 2024
概括
病毒和纳米鞭通过影响细菌的生长和呼吸来控制淡水碳流. 上下作用力,特别是病毒溶解,降低了细菌生长效率,突出显示了它们在水生生态系统中的关键作用.
科学领域:
- 微生物生态学 微生物生态学
- 水生生态系统 水生生态系统
- 生物地质化学循环的过程
背景情况:
- 细菌浮游生物驱动淡水系统中的碳流.
- 细菌生长效率 (BGE) 受环境因素和死亡率的影响.
- 病毒和原生体的自上而下的控制是微生物食物网的关键因素.
研究的目的:
- 在细菌碳流中研究病毒和异质性纳米鞭的自上而下的控制.
- 了解影响淡水类系统中细菌生长效率 (BGE) 的因素.
- 为了确定自下而上的与自上而下的细菌浮游生物控制的相对重要性.
主要方法:
- 从2023年到2024年,在法国圣日尔瓦斯湖 (Lake Saint-Gervais) 进行了一年的研究.
- 流细胞计用于识别病毒子组 (VLP1-VLP4) 和细菌群 (HNA).
- 测量包括细菌生产,呼吸和营养度,以评估BGE和对照.
主要成果:
- 细菌生长效率 (BGE) 差异很大 (9.9%至45.5%),与生产-呼吸脱有关.
- 高核酸 (HNA) 细菌,活性部分,是细菌生产的主要贡献者,并与BGE相关.
- 主导性病毒亚组 (VLP1) 与HNA群体密切相关.
- 上下作用力 (病毒溶解和放牧) 对BGE产生敌对影响,通过优先影响HNA细菌来减少BGE.
结论:
- 病毒和纳米鞭状体的自上而下的控制在调节淡水系统中通过细菌浮游生物的碳流中发挥着至关重要的作用.
- 死亡力,而不是营养可用性,是这个湖泊中BGE的更强的决定因素.
- 了解病毒-细菌相互作用对于预测水生环境中的碳循环至关重要.
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