Algal situation reports

The plankton community was dominated by diatoms in both Skagerrak and Kattegat and Skeletonema marinoi dominated at all stations. Different cryptomonads such as Teleaulax were also common. The chl a measurements were overall low and no tendency of a forthcoming spring bloom could be seen. A bit …

Relatively few cells were found at all stations which is normal for the season. A quite diverse community but with few cells of each species was however found in the Skagerrak area. The diatom genus Pseudo-nitzschia was found in high abundance at the outer station in Skagerrak (Å17) and at both …

The major differences between the Skagerrak and Kattegat areas during the latest cruise were the high cell numbers of the diatoms Pseudosolenia calcar-avis and Pseudo-nitzschia spp. in the Kattegat phytoplankton samples. The species’ were present in the Skagerrak as well but in low cell numbers. …

The phytoplankton species diversity was rather high in the Skagerrak and Kattegat areas although the number of cells was higher in the latter. Diatoms dominated the samples and chlorophyll a concentrations were at average at all stations but somewhat enhanced, within the limits, at Å13 in the …

The integrated (0-20 meters) chlorophyll a concentrations were normal for the season at most of the Skagerrak and Kattegat sampling sites. The only exception was Släggö with lower concentrations than normal and Anholt E with higher concentration than normal. The plankton community was relatively …

A more autumn like phytoplankton community with more dinoflagellates was observed in the Skagerrak. The same phenomenon was not observed in the Kattegat. Only a few species and few cells were found in the Skagerrak waters at the ordinary phytoplankton stations. This was evident from the quite low …

The phytoplankton situation in the Skagerrak and Kattegat areas was relatively stable compared to the sampling three weeks earlier. However, there were no chlorophyll fluorescence peaks to speak of. Only at W Landskrona on the edge of the Sound an extra phytoplankton sampling was made at 15 meters …

The integrated (0-20 meters) chlorophyll a concentrations were low at all of the Skagerrak sampling sites, which is normal for the season. The species diversity was quite divers low at the Skagerrak stations but with low abundance of each species. Only a few species of diatoms were found and the …

During the mid April phytoplankton sampling the species diversity was very low at the Skagerrak stations. Whereas the total cell counts were the highest one month earlier at Å17, the situation was the opposite now with no diatoms. A few ciliates, small flagellates and dinoflagellates were present. …

The phytoplankton samples from the Skagerrak station Å17 had the highest diversity of the plankton stations in the Western Sea in mid-March. Diatoms were the most frequent and the diatom Leptocylindrus danicus the most numerous species. At Släggö and at the Kattegat stations the species diversity …