EUNIS habitat classification 2012 > A - Marine habitats > A7 - Pelagic water column > A7.4 - Partially mixed water column with reduced salinity and medium or long residence time

Partially mixed water column with reduced salinity and medium or long residence time

English name: Partially mixed water column with reduced salinity and medium or long residence time

Description (English)

A water column which is unmixed or only partially mixed because the depth of the water body is greater than the depth of mixing. Salinity is reduced relative to the adjacent fully marine seawater. This habitat type is usually found in deeper coastal water situations and is the result of river inflow or ice melt. Note that some discretion should be used in the interpretation of “adjacent”, for example in the Baltic Sea, “adjacent” fully marine seawater is reached only in the Kattegat. Medium residence time is defined as changing over time preiods greater than daily and up to about 14 days (based on the time required for the phytoplankton population to double) and long residence time lasting longer than 14 days.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A7.4
Relation to Annex I habitat types (EU Habitats Directive)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Not available

Other classifications

Classification Code Habitat type name Relationship type
CORINE Land Cover 5.2.3. Sea and ocean n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A7.4 Partially mixed water column with reduced salinity and medium or long residence time same
EUNIS Habitat Classification 200308 A7.4 Partially mixed water column with reduced salinity and medium or long residence time same
EUNIS Habitat Classification 200202 A7.4 Partially mixed water column with reduced salinity and medium or long residence time same
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