Baltic Sea, surface water salinity 0.5-6 psu, bottom water salinity 1-6 psu, Exposed, 90-150 ice days
Baltic Sea, surface water salinity 3-6 psu, bottom water salinity 3-6 psu, Sheltered, 90-150 ice days
Baltic Sea, surface water salinity 5-8 psu, bottom water salinity 5-8 psu, Exposed, < 90 ice days
Baltic Sea, surface water salinity 6-8 psu, bottom water salinity 6-12 psu, Exposed, <90 ice days
Baltic Sea, surface water salinity 8-12 psu, bottom water salinity 8-12 psu, Sheltered, <90 ice days
Baltic Sea, surface water salinity 6-8 psu, bottom water salinity 8-11 psu, Exposed, <90 ice days
Baltic Sea, surface water salinity 13-18 psu, bottom water salinity 18-23 psu, Sheltered,<90 ice days
Baltic Sea, surface water salinity 3-6 psu, bottom water salinity 3-6 psu, Moderately Exposed to exposed, 90-150 ice days
Black Sea, mesohaline, microtidal, shallow, moderately exposed, mixed substratum
North East Atlantic, open oceanic or enclosed seas, exposed or sheltered, euhaline, shallow (< 30 m), microtidal or mesotidal, fully mixed or partly stratified
Skagerrak Outer Arc Type, polyhaline, microtidal, exposed, deep
North East Atlantic, polyhaline, exposed or moderately exposed (Wadden Sea type)
North East, Atlantic Sea, deep fjordic and sea loch systems
North East Atlantic, Skagerrak Inner Arc Type, polyhaline (25-30), microtidal, moderately exposed, shallow, fully mixed
North East Atlantic, Skagerrak Inner Arc Type, polyhaline (10-30), microtidal, moderately sheltered, shallow, partly stratified
North East Atlantic, fjord with a shallow sill at the mouth with very deep maximum depth in the central basin with poor deepwater exchange
Mediterranean, highly influenced by freshwater input
Mediterranean, moderately influenced by freshwater input (continent influence)
Mediterranean, moderately influenced by freshwater input (continent influence), Adriatic coast
Mediterranean, not influenced by freshwater input (Eastern Basin)
Mediterranean, continental coast, not influenced by freshwater input (Western Basin)
Mediterranean, island coast (Western Basin)
Eastern Continental, lowland, very shallow, hard-water
Alpine, lowland or mid-altitude, deep, moderate to high alkalinity (alpine influence), large
Alpine, mid-altitude, shallow, moderate to high alkalinity (alpine influence), large
Central Baltic, lowland, shallow, calcareous
Central Baltic, lowland, very shallow, calcareous
Central Baltic, lowland, shallow, small, siliceous (moderate alkalinity)
Mediterranean, reservoirs, deep, large, siliceous, “wet” areas
Mediterranean, reservoirs, deep, large, calcareous
Northern, lowland, shallow, moderate alkalinity, clear
Northern, lowland, shallow, low alkalinity, clear
Northern, lowland, deep, low alkalinity, clear
Northern, lowland, shallow, low alkalinity, meso-humic
Northern, lowland, shallow, low alkalinity, polyhumic
Northern, mid-altitude, shallow, low alkalinity, clear
Northern, mid-altitude, shallow, low alkalinity, meso-humic
Northern, mid-altitude, shallow, low alkalinity, poly-humic
Northern, highland, shallow, siliceous, low alkalinity
Northern, lowland, shallow, moderate alkalinity, meso-humic
Northern, lowland, shallow, moderate alkalinity,poli-humic
Northern lowland/mid-altitude, low alkalinity, clear
Northern ecoregion 22, low alkalinity, clear and humic
Northern dimictic clear water lakes, low alkalinity
Northern dimictic (meso)humic water lakes, low alkalinity
Northern, high alkalinity, clear, atlantic subtype
Northern, high alkalinity, humic, atlantic subtype
Pre-alpine, small to medium, high altitude calcareous
Alpine, small to medium, high altitude, siliceous
Central/Baltic, small, lowland, siliceous sand
Central/Baltic, small, lowland, siliceous rock
Central/Baltic, small, mid-altitude, siliceous
Central/Baltic, small, lowland, calcareous
Eastern Continental Carpathians, small to medium, mid-altitude (includes RW-R-E1a and RW-R-1b)
Eastern Continental Plains, medium-sized, lowland
Eastern Continental Plains, large, lowland
Eastern Continental Plains, medium-sized, mid-altitude
Eastern Continental Plains, small, lowland
Eastern Continental Plains, small, mid-altitude
Eastern Continental Balkan, small, calcareous, mid-altitude
Eastern Continental Balkan, small to medium-sized, calcareous karst spring
Very large medium to high alkalinity (all GIGs)
Mediterranean, small-medium, Mediterranean mountains
Mediterranean, small, Mediterranean temporary
Northern, small, lowland, siliceous, moderate alkalinity
Northern, small-medium, lowland, siliceous, low alkalinity, clear
Northern, small-medium, lowland, organic, low alkalinity
Northern, medium, lowland, siliceous, moderate alkalinity
Northern, small, mid-altitude, siliceous, low alkalinity
Northern, small, highland, siliceous, low alkalinity, clear
Northern, small, medium, mid-altitude, siliceous, low alkalinity, organic (humic)
Baltic Sea, surface water salinity 0-8 psu, bottom water salinity 0-8 psu, very sheltered, no ice days
Mediterranean Sea, coastal lagoons, salinity 5-18 psu
Mediterranean Sea, coastal lagoons, salinity 0-5 psu
Mediterranean Sea, coastal lagoons, Salinity 18-40 psu
Mediterranean Sea, estuaries, salt wedge type
North East Atlantic, transitional waters