Data Processing:
This dataset was achieved by splitting the particles in the companion dataset "Salp Gut Particle Sizes" for a given individual into discrete size bins (see Related Dataset https://www.bco-dmo.org/dataset/880927). To calculate "X-Y Abundance", the sum of the adjusted counts ("TotCount") for particles larger than X and smaller than Y within a salp gut was divided by the bin width, or Y-X. The resulting columns represent the Normalized Abundance Size Spectrum, or NASS. Biomass was similarly calculated with the exception of rather than summing the particle counts from "Salp Gut Particle Sizes", we sum the converted carbon biomass (column "TotBiomass" in "Salp Gut Particle Sizes"). The result is the Normalized Biomass Size Spectrum, or NBSS.

Because we noted a lack of chain-forming diatoms as well as many broken particles, we also apply a correction for size to all chain-forming diatoms and broken particles observed in the raw data. This correction was determined by first finding the relative proportions of solitary and chained diatoms in the water column for each cycle using FlowCam data (or non-broken particles of the same type in the salp gut when not possible). We then randomly reassigned every diatom and/or broken particle in the salp guts to a size class weighted by its respective relative contribution to the water column. The effective abundance of the particle was then calculated as the fraction of its biovolume to that of the "average particle" of its type from that cycle. The carbon content was applied to the reassigned size class unchanged to avoid biasing the NBSS high. This process was then repeated 10,000 times in a Monte Carlo random resampling scheme to account for additional introduced uncertainty in these reassignments. The values reported here represent the mean NASS/NBSS for each size class of particle within each salp across all 10,000 simulations.

BCO-DMO Processing:
- started with file named "SalpGut_ReducedV2.xlsx" received February 2023;
- converted dates to YYYY-MM-DD format;
- converted times to hh:mm format;
- renamed fields to comply with BCO-DMO naming conventions;
- added date-time fields in ISO8601 (UTC) format: YYYY-MM-DDThh:mmZ;
- converted latitudes and longitudes to decimal degrees.

salp_gut_reduced.csv