Microbial diversity in migrating ripple and stationary sediments of sandy lowland streams

The sandy sediments in lowland streams can form migrating ripples creating a dynamic environment for microbial communities as the sediment grains experience a high frequent cycle of movement and rest. We studied the influence of the phenomenon of sand transported at contrasting frequencies on microbial diversity by collecting sediments from five lowland streams in northeastern Germany between May and June 2020. Our sampling sites included the streams Verlorenwasser, Pulsnitz and Plane as well as the rivers Spree and Oker. We compared the diversity of bacteria, fungi, and phagotrophic protists at two different sediment depths from migrating ripple and stable sediment patches at each sampling site.

低地溪流中的砂质沉积物可形成迁移沙纹，沉积物颗粒频繁经历运动与静止的交替循环，进而为微生物群落构建起动态生境。本研究于2020年5—6月间，从德国东北部的5条低地溪流中采集沉积物样本，探究不同输沙频率现象对微生物多样性的影响。本研究的采样点位涵盖Verlorenwasser溪、Pulsnitz溪、Plane溪，以及Spree河与Oker河。我们在各采样点的迁移沙纹斑块与稳定沉积物斑块中，分别在两种不同沉积物深度下，对细菌、真菌及吞噬营养型原生生物（phagotrophic protists）的多样性开展对比分析。