Additional file 2 of Case report: first data on the foraging behaviour of velvet scoters (Melanitta fusca) in soft-bottom coastal waters of the southeast Baltic Sea

Additional file 2. Description of data: biomass (expressed in g m-2) of benthic macrofauna collated from existing data sets from 2016, 2020 and 2021. Benthic macrofauna samples were collected in soft-sediment transect from 5 to 25 m depth. Sampling was carried out with Van Veen grab covering a bottom area of 0.1 m2. All samples irrespective of sampling were sieved with 0.5 mm mesh size sieve and fixed with 4% formaldehyde–seawater solution on board. In the laboratory all the taxa were identified to the lowest possible taxonomic level, individuals counted and wet weight biomass measured with precision of 0.1 mg.