2)
3)
4)
Fig. 9: Eddies in the Baltic, here north of Rügen, illustrated
by blue green algae, have been shown in the Baltic sea
for the first time and been verified by ground truth datal?). 7)
(Black and white rendition of colour coded original).
3)
13
Fig. 10: Plastic bag experiments were employed to investigate the
influence of phosphate on the stimulation of blue green algae
as well as on the development of heterocysts and the nitrogen
fixation ability of these algae (diameter of bags 50 cm, length 400 cm).