High-Arctic lake sediments are enriched in novel Metagenome Assembled Genomes fit for low temperature and oligotrophy. freshwater sediment metagenome

The Arctic is currently experiencing climate-change related warming, which rapidly affects the environmental constraints on its microbial communities. Yet, our knowledge of the community structure and function of high Arctic freshwater microbes is still lacking, even though they play key roles in nutrient cycling. Here, using high-throughput sequencing, we show that sediment microbial communities in the High Arctic’s largest lake by volume, Lake Hazen, are highly diverse and contain novel organisms which genomes we could reconstruct.

当前北极正经历与气候变化相关的升温，这正快速改变其微生物群落所处的环境约束条件。尽管高北极淡水微生物在养分循环中发挥关键作用，但目前学界对其群落结构与功能的认知仍存在不足。本研究采用高通量测序（high-throughput sequencing）技术，证实按体积计为高北极地区最大湖泊的黑曾湖（Lake Hazen）的沉积物微生物群落具有极高多样性，且包含可对其基因组进行组装重建的新型微生物。