Figure 1.
Map of macroregions and regions of the Baltic Sea (sensu [2]).
Salinity calculated from [195].
Table 1.
Estimated number of species, laboratories and scientists by major organism groups in the Baltic Sea.
Table 2.
Taxonomic classification of species reported in the Baltic Sea area, incl. Kattegat.
Figure 2.
Recorded sub-regional species richness of six organism groups in the Baltic Sea.
Figure 3.
Annual zooplankton (A) biomass and (B) production by taxa in Gdansk Bay in the 1980s (modified from [196]).
Table 3.
Sub-regional dominance shift of the most common zooplankton taxa in the Baltic Sea across the salinity gradient from A to K.
Figure 4.
Recorded macrozoobenthos taxonomic composition in the Baltic Sea, based on historical and recent data.
The spatial compoment is given on Figure 5.
Figure 5.
Sub-regional distribution of (A) marine and (B) freshwater taxa in the Baltic Sea: case of macrozoobenthos.
Projection: ERTS89_LAEA CRS (Lambert Azimuthal Equal Area projection, ETRS89 datum).
Figure 6.
Spawner biomass of cod, herring, and sprat in the Baltic Sea (ICES management subdivisions 25–32, 25–29 (excluding the Gulf of Riga) and 22–32, respectively).
Data: [137].
Table 4.
The status of nonindigenous species by major organism groups in the Baltic Sea.
Table 5.
Origin of the recorded alien species by selected contrasting sub-areas, and with different importance of different invasion pathways, in the Baltic Sea.