Seawater was collected in 30-liter Go-Flo bottles, except for a few stations sampled with CTD Niskin bottles. Community rate estimates were made by seawater dilution based on HPLC chlorophyll a values with flow cytometry corrections for changes in cell pigment. Full methods are described in:
Landry, M. R., Selph, K. E., Brown, S. L., Abbott, M. R., Measures, C. I., Vink, S., Allen, C. B., Calbet, A., Christensen, S. and Nolla, H. (2002) Seasonal dynamics of phytoplankton in the Antarctic Polar Front region at 170°W. Deep-Sea Res. II, 49, 1843–1865. doi:10.1016/S0967-0645(02)00015-2