We provide datasets that include parameters regarding phytoplankton community, primary production and chl a measurements. Chlorophyll a concentrations analysis started from 1972 till 2017 and included coastal and open waters stations. Phytoplankton community analysis consist of datasets started from 1952-2017 while primary production measurements were obtained from 1962.

Counts of diatom cells for 7 stations in the Southern North Sea in January and February 1971.The data are digitized from technical reports in the frame of the 4DEMON project.

Data on concentrations of chlorophyll, phytoplankton, POC and dry weight measurements during three 24h-cycli at Gazi Creek in August 1989. Additionally tide, temperature, salinity and pH were measured. The data were digitized by VLIZ from the original report: Aernaudts, H. (1990). Seston in mangrove ecosysteem (Gazi, Kenia) = Seston in a mangrove ecosystem (Gazi, Kenya). MSc Thesis. VUB: Brussel. 52 pp.