沉积物沉积对北极全新纪海洋沉积物的微生物聚集过程的影响
Dukki Han1, Tim Richter-Heitmann2, Ji-Hoon Kim3
1Department of Marine Bioscience, Gangneung-Wonju National University, Gangneung-si, Gangwon-do, Republic of Korea.
Frontiers in microbiology
|September 13, 2023
概括
全新纪海平面上升形成了北极的微生物群落在沉积物中. 分散限制影响了细菌的组合,揭示了由古气候变化驱动的生态继承.
科学领域:
- *海洋地质学和微生物生态学.
- *北极架沉积物的古海洋学和生物地球化学.
背景情况:
- *海平面上升和相关的沉积/生地化学变化影响北极微生物生态系统.
- * 了解微生物群落在应对过去环境变化时的聚集,对于预测未来变化至关重要.
研究的目的:
- * 调查北极全新纪沉积物中考古和细菌群落的组成和丰富性.
- *阐明在过去的海平面上升和古气候变化下控制微生物社区聚集的生态过程.
主要方法:
- *分析了来自北冰洋西部Chuckchi Shelf的10.7米沉积物核心.
- *基于16S rRNA基因的metabarcoding测序,用于社区组成.
- *用于基因丰度分析的定量PCR (qPCR).
主要成果:
- *北极全新纪沉积物是独特的当地微生物群落的主机,受到地化学和古气候因素的影响.
- *细菌群落比考古群落多样化,在硫酸盐-甲过渡区有显著的区别.
- * 在中 Holocene methanogenic 沉积物中发现了过去的蓝藻细菌繁殖的证据.
- * 细菌群体的聚集主要是由分散限制和过去海洋学变化下的环境选择驱动的.
结论:
- *古气候变化显著改变了北极沉积物中的生态继承和微生物社区聚集过程.
- *分散限制是北冰洋西部地质时间尺度上的细菌社区继承的关键驱动因素.
- *这项研究提供了一个概念模型,用于理解受海平面上升影响的Holocene沉积息地中的微生物生态.
关键词:
北极全新纪 (Holocene) 是北极的全新纪.我们的eDNADNA海洋沉积物海洋沉积物超级编码元标段编码.一个微生物组合.沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积沉积
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