Diatom data from multicores collected during the RV Investigator voyage IN2017_V01, Sabrina Coast shelf, Antarctica (2017)

In the lab at Colgate University, 20-25 mg of sediment were weighed to the tenth of a mg and placed in 20 ml glass vials. Diatoms were observed with an Olympus BX50 microscope using the 100x/1.30 oil immersion objective and 10x eyepieces, for a total magnification of 1000x.

For each slide, at least 400 diatom valves were counted along non-overlapping transects. Valves were only counted if greater than 50% complete, and diatoms were identified to the species level when possible using identifications from Cremer et al. (2003), Cefarelli et al. (2010), and Al-Handal et al. (2022). Unidentified diatoms were placed in either the unidentified centric diatom or unidentified pennate diatom category.