Figure 1.

Sampling sites of the in situ incubation experiment, showing the Baltic Sea in Northern Europe (left) and exact location along the coast and Warnow river (right). The dendrogram depicts hierarchical clustering of sites based on Euclidian distance of z-transformed physicochemical and nutrient data. Clusters were agglomerated using Ward’s method. Maps were constructed using Ocean Data View v. 5.0.0 [24].