Fig. 1
From: Broad-scale patterns of abundance of non-indigenous soft-bottom invertebrates in Denmark
Geographical regions. West = North Sea + Skagerrak + Wadden Sea (Ws) + western fjords (e.g. Ringkøbing Fjord = Rf) and Limfjorden (Lf, a sound connecting the western North Sea to eastern Kattegat). Northeast = Northeastern Kattegat + Swedish waters near Kullen and Goteborg. Southeast = Southeast of Aarhus + the Belts + Inner Baltic all the way to Bornholm (Bh). West is characterized by an ‘oceanic’ influence of high salinity (western fjords and sounds can have brackish conditions), Northeast by frequent fluctuations in salinity, from fully marine to brackish conditions (depending on wind direction, currents, precipitation patterns and runoff), and Southeast by relatively constant and low salinities