Antarctic Circumnavigation Bacterial Collection (ACBC) Data file: antarctic_circumnavigation_bacterial_collection.csv ACBC Code: sample code defined as part of the project where ACBC is the Antarctic Circumnavigation Bacteria Collection. Each code is unique and each sample was assigned a code. ace_sample_number: each sample collected as part of the Antarctic Circumnavigation Expedition (ACE) was assigned a unique sample number, ensuring it could be uniquely identified amongst all ACE samples. This sample number is written in the format: shipname(AT = R/V Akademik Tryoshnikov)/expeditionname(ACE)/leg number of expedition/ACE project number/julian day of year/ACE event number/ACE project principal investigator initials/ACE project sample number class: hierarchical taxonomic ranks family: hierarchical taxonomic ranks Top-hit taxon name: best taxonomic name found Top-hit strain name: if this column includes (T) this means it is a type strain % similarity: pairwise sequence similarity is the key criterion for microbial identification and as suggested by Kim et al. (2014), a species boundary is defined by a similarity value of 98.65% or greater. In other words, if two sequences show a similarity of 98.65% or less, they belong to different species station: this is the station number assigned by ACE, where it is a location where a number of instrument deployments were made. event number: this is the event number assigned by ACE, when an instrument deployment or sampling event took place. sampling depth (m): the depth at which the water sample was taken from which the sample resulted (measured in metres below the surface). If the depth is 0 m, then this sample was obtained from the underway water supply line on the ship [m] Medium: type of culture medium used. R2A: "poor culture medium" https://assets.thermofisher.com/TFS-Assets/LSG/manuals/IFU112543.pdf or MA: Marine Agar "rich medium" https://www.bd.com/europe/regulatory/Assets/IFU/Difco_BBL/212185.pdf Sampling time yyy-mm-ddThh:mm:ss.sss (UTC time): date and time at which the sample was taken in ISO8601 format yyyy-mm-ddThh:mm:ss [UTC] Latitude [degrees_north]: latitude at which the sample was taken [decimal degrees north] Longitude [degrees_east]: longitude at which the sample was taken [decimal degrees east] Link to NCBI database: URL of where the sample can be found in the NCBI database notes: extra information about record