Totten Glacier ocean & sediment DNA (IN2017_V01)

This record presents genetic data underlying the paper 'From the Surface Ocean to the Seafloor: Linking Modern and Paleo-genetics at the Sabrina Coast, East Antarctica (IN2017_V01)' by Armbrecht et al. In this study, we provide the first taxonomic overview of the modern and ancient marine bacterial and eukaryotic communities of the Totten Glacier region, East Antarctica, using a combination of 16S and 18S rRNA amplicon sequencing (modern DNA) and shotgun metagenomic (sedimentary ancient DNA, sedaDNA) analyses, respectively. We explore environmental and geochemical variables that drive these biodiversity patterns. Our data show considerable differences between eukaryote and bacterial signals detected via DNA analyses in the water column vs. the sediments. Organisms that are well represented in deeper waters appear are to have a higher likelihood of becoming preserved in the sediments. The study provides the first assessment of DNA transfer from ocean waters to sediments, while also providing a broad overview of the biological communities occurring in the climatically important Totten Glacier region.(Please note that this record is mirrored in the UTAS Research Data Portal, here: https://rdp.utas.edu.au/metadata/8628529b-49cf-42d4-9459-3c1e97f70d98)

本数据集包含Armbrecht等人发表的论文《从表层海洋到海底：东南极洲萨布里娜海岸现代与古遗传学关联研究（IN2017_V01）》所依托的遗传数据。本研究首次对东南极洲托滕冰川区域的现代与远古海洋细菌及真核生物群落开展分类学概览分析，分别采用16S与18S核糖体RNA（rRNA）扩增子测序（用于现代DNA分析）以及鸟枪宏基因组测序（用于沉积物古DNA（sedaDNA）分析）。本研究探究了驱动该区域生物多样性分布格局的环境与地球化学变量。本研究数据显示，水体与沉积物中通过DNA分析检测到的真核生物与细菌信号存在显著差异。在深水层中丰度较高的生物，其在沉积物中得以保存的概率相对更高。本研究首次评估了海洋水体向沉积物的DNA转移过程，同时对气候关键区域托滕冰川区域的生物群落进行了全面概览。（请注意本数据集已在塔斯马尼亚大学研究数据门户（UTAS Research Data Portal）镜像发布，链接：https://rdp.utas.edu.au/metadata/8628529b-49cf-42d4-9459-3c1e97f70d98）