show Abstracthide AbstractArtificial particles (Alginate and agarose) were incubated for different times in an In Situ Chemotaxis Assay (ISCA) at different stations during an oceanographic campaign in the Arctic Ocean (N-ARC, DY167), in the Barents Sea.The DNA of these unique artificial particles was extracted, and the nifH and 16S rRNA genes were amplified and sequenced.