The nitrogen cycle during a marine Arctic microbial blooom. arctic marine metagenome

This study aimed to investigate the changes in an Arctic microbial community during a phytoplankton bloom with a special focus on the nitrogen cycle. Using metagenomic and metatranscriptomic samples from the Dease Strait (Canada) from March to July (2014), we reconstructed 176 metagenome-assembled genomes. Bacteria dominated the microbial community, although archaea reached up to 25% of genomic abundance in early spring. Based on the functional analysis of our data, we see a transition from a community where nitrogen-based chemolitotrophy plays a relevant role, to a chemoorganotrophic community based on the carbohydates released during the phytoplankton bloom, where different groups specialize in different nitrogen sources. This project used the metagenomic and metatranscriptomic libraries from the "Arctic ocean water Meta'omics" bioproject (PRJNA803814)