Biocenosis of Mediterranean shelf-edge rock

Description (English)

The biocoenoses of the deep circalittoral rocky bottoms mainly composed of sponges, anthozoans, bryozoans and brachiopods while macroscopic plant life is absent. Found near the border of the continental shelf, these biocoenoses, dwelling to 250 m depth, usually occupy rough bottoms where current and turbidity are reasonably important. In these habitats, the progressively lower light conditions have a profound influence on the biocoenoses composition mostly because of reduced primary production, but this zone continues to be characterised by high biodiversity and biomass levels, at times comparable to those found in shallow waters.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MD151
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

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
EUNIS Habitat Classification 2007 (revised descriptions 2012) A4 Circalittoral rock and other hard substrata narrower
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A4 Circalittoral rock and other hard substrata same
EUNIS Habitat Classification 200308 A3 Sublittoral rock and other hard substrata wider
EUNIS Habitat Classification 200202 A3 Sublittoral rock and other hard substrata wider
EUNIS Habitat Classification 199910 A3 Sublittoral rock and other hard substrata wider
EUNIS Habitat Classification 199811 A3 Sublittoral rock and other hard substrata wider
EUNIS Habitat Classification 199712 X15 Sublittoral rock (to 200m depth) same
Palaearctic Habitat Classification 199905 11.24 Sublittoral rocky seabeds and kelp forests narrower
Palaearctic Habitat Classification 1997 11.25 Sublittoral organogenic concretions narrower
Palaearctic Habitat Classification 1997 11.24 Sublittoral rocky seabeds and kelp forests narrower
Palaearctic Habitat Classification 1996 11.25   narrower
Palaearctic Habitat Classification 1996 11.24   narrower
Palaearctic Habitat Classification 1993 11.24   narrower
Palaearctic Habitat Classification 1993 11.25   narrower
CORINE Biotopes Classification 1991 11.25   narrower
CORINE Biotopes Classification 1991 11.24   narrower
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