在微生物的海洋中,旋事件引发了萨尔加索海藻出口
Marc Alec Fontánez Ortiz1,2,3, Francesca De Martini4, Susanne Neuer1,3,5
1School of Life Sciences, Arizona State University, Tempe, AZ 85287, United States.
ISME communications
|June 30, 2025
概括
萨尔加索海中的中层层流影响着微生物群落在沉没的粒子上. 像Rhizosolenia这样的大藻被添加了反气旋旋,这表明有机碳出口的周期性脉冲.
科学领域:
- 海洋微生物生态学
- 海洋学 海洋学 海洋学
- 生物地质化学循环 生物地质化学循环
背景情况:
- 沉没粒子是海洋碳出口的关键,但它们的微生物起源和社区结构仍然不清楚.
- 诸如和分层等海洋事件会影响萨尔加索海中的微生物群落.
- 了解与粒子相关的微生物对于预测深海碳循环至关重要.
研究的目的:
- 为了研究中等尺度旋对萨尔加索海中沉没颗粒的微生物群落的影响.
- 分析不同类型和季节的旋中与沉没颗粒相关的原生生物和光自otrophic 社区.
- 识别特定的富含颗粒的种类,并将它们与海洋学条件联系起来.
主要方法:
- 在百慕大大西洋时间序列研究站点附近的光区采集沉没粒子和海水的样本.
- 使用16S rRNA基因V4-V5 amplicons.分析 prokaryotic 和光自otrophic 社区.
- 社区和差异性丰度分析,以比较水和颗粒之间的微生物种群,以及在不同的状况下.
主要成果:
- Prokaryotic 社区在海水和粒子样本之间明显分离,与光自食生物不同.
- 小型植物浮游生物种群主导着粒子社区.
- 大藻Rhizosolenia在反旋风中心内被丰富了沉没颗粒,与带引发的上升有关.
结论:
- 中等尺度的旋显著影响着微生物群落在沉没颗粒上的组成.
- 虽然小型浮游生物始终有助于粒子流动,但旋驱动的上游可以导致较大的浮游生物的偶发丰富,从而可能增加整体颗粒有机碳出口.
- 里索索莱尼亚丰富突出了特定海洋学事件在调节海洋碳出口方面的作用.
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