Algal situation reports

Reports from SMHIs offshore sampling programme, which describe the algal situation in marine waters surrounding Sweden.

Algae report number 1, 2025

Several stations were not sampled due to stormy weather. The species diversity and total cell numbers were both low at all stations along the west coast. In the Skagerrak the samples had a domination of small cells of various speicies. The plankton community in the Kattegat had low cell numbers and …

 
Type: Report
Author: Marie Johansen
Published: Jan, 2025
Last updated:

Algae report number 11, 2024

All stations along the Swedish west coast had quite high species diversity when considering the season but most cells were only found in low cell numbers. The order Dictyochales was common at all stations except at Å17. The order was present in both its naked form but also in the forms known as …

 
Type: Report
Author: Ann-Turi Skjevik, Marie Johansen
Published: Nov, 2024
Last updated:

Algae report number 10, 2024

All stations along the Swedish west coast had quite high total cell numbers except Å17 that had very low total cell numbers All stations had moderate to high biodiversity. Diatoms were generally the most abundant group across sites, particularly Pseudosolenia calcar-avis and Cerataulina pelagica. …

 
Type: Report
Author: Marie Johansen, Anders Torstensson
Published: Nov, 2024
Last updated:

Algae report number 9, 2024

High species diversity was found at all of the four stations in the Skagerrak and Kattegat areas. There were however variations in the total cell counts, and the Kattegat stations had the highest abundancies. The species composition was relatively similar at the various stations, Å17 differed by …

 
Type: Report
Author: Ann-Turi Skjevik, Maria Karlberg
Published: Oct, 2024
Last updated:

Algae report number 8, 2024

All stations along the Swedish west coast had low total cell numbers and low biodiversity. Small cells dominated and the coccolithophore Emiliania huxleyi was found in highest amount at all stations except Å17 where the dinoflagellate Heterocapsa rotundata was the most common. A chlorophyll …

 
Type: Report
Author: Marie Johansen
Published: Aug, 2024
Last updated:

Algae report number 7, 2024

The analyses were conducted onboard the R/V Svea during the cruise, which began in Falkenberg, traversed the Baltic Sea, and concluded on the west coast. Surface samples were collected at all stations in the Baltic Sea specifically to monitor cyanobacteria blooms. Additionally, water from …

 
Type: Report
Author: Anders Torstensson
Published: Jul, 2024
Last updated:

Algae report number 6, 2024

All stations along the Swedish west coast had a dominance of diatoms. A bit surprising was also to find several cells of the bioluminescent dinoflagellate Noctiluca scintillans, at all stations. Except for this, small flagellates of various taxa were the most common, and in Skagerrak Emiliania …

 
Type: Report
Author: Ann-Turi Skjevik, Marie Johansen
Published: Jun, 2024
Last updated:

Algae report number 5, 2024

Some chains of Skeletonema marinoi and Guinardia delicatula was still present as a remembrance of the spring bloom in the Kattegat and Skagerrak area. Except for the diatoms, small flagellates of different sorts were most common. The integrated chlorophyll concentrations were above normal at the …

 
Type: Report
Author: Anders Torstensson, Marie Johansen
Published: May, 2024
Last updated:

Algae report number 4, 2024

Due to bad weather, all of the Skagerrak stations except Släggö were not sampled. The spring bloom had passed and the cell concentrations and biodiversity were overall low. Some chains of Skeletonema marinoi and Guinardia delicatula was still present as a remembrance of the spring bloom. Except for …

 
Type: Report
Author: Marie Johansen, Maria Karlberg
Published: Apr, 2024
Last updated:

Algae report number 3, 2024

The diatom spring bloom was ongoing at Anholt E and Fladen in the Kattegat, but at all other Kattegat and Skagerrak stations the total cell numbers were moderate although the scene was set when it comes to species. The abundance and biodiversity were low in the Baltic Sea, although moderate amounts …

 
Type: Report
Author: Ann-Turi Skjevik, Anders Torstensson
Published: Mar, 2024
Last updated:
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