Phytoplankton sampled approximately at monthly intervals between May 1989 and December 2016 at Station E2CO (A Coruña, NW Spain) with Niskin bottles at 3-5 depths in the photic zone (0-70 m). All samples were collected between 10:00 and 14:00 o'clock (local time) and were preserved inLugol's iodine acid solution. Counting and identification: inverted microscope (Utermöhl's method). Some species recognized individually after 2008. Species names referenced to the Word Register of Marine Species (last access: June 2019). Phytoplankton identification and counts were made by Manuel Varela (until 2010) and Jorge Lorenzo (2011-2016). These series are part of the long-term observational project RADIALES (Instituto Español de Oceanografía, IEO, Spain).

Empty cells = missing values