EUNIS habitat classification 2017 > M - Marine benthic habitats > ME1 - Upper bathyal rock > ME12 - Atlantic upper bathyal rock > ME121 - Sparse communities on Atlantic upper bathyal rock

Sparse communities on Atlantic upper bathyal rock

Quick facts

EUNIS habitat type code ME121
Relation to Resolution 4 habitat type (used for designation of Emerald sites)

Description (English)

This broad community includes all biotopes where barnacle species are the dominant fauna. The species of barnacle will vary with depth and location. This community is found on rock and associated fauna are sparse. Currently, barnacle dominated communities in both the upper bathyal and the mid bathyal have only one child biotope (Bathylasma hirsutum assemblage) but in the future new barnacle biotopes may be discovered which differ between zones. It is likely that, due to changes in depth, associated species differ in the upper and mid bathyal versions of this broad community, but further evidence is required to describe differences.
This broad community includes all biotopes where brachiopod species are the dominant fauna. The species of brachiopod will vary with depth and location. Associated fauna are sparse. Currently, brachiopod dominated communities in both the upper bathyal and the mid bathyal have only one child biotope (Dallina septigera assemblage), but in the future new brachiopod biotopes may be discovered which differ between zones. It is likely that, due to changes in depth, associated species differ in the upper and mid bathyal versions of this broad community, but further evidence is required to describe differences.
This broad community includes all biotopes that are characterised by encrusting species including deep-sea sponges, serpulid worms, cup corals and Anoniimid bivalves. This community is widespread and occurs on coarse sediment and rock where erect coral species are absent. When this broad community occurs on rock it is distinguished by the present of holuthurian Psolus squamatus.

Source: EUNIS habitat classification

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Bathylasma hirsutum
Invertebrates Dallina septigera
Species scientific name English common name Species group
Bathylasma hirsutum Invertebrates
Dallina septigera Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A6.1 Deep-sea rock and artificial 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 A6.1 Deep-sea rock and artificial hard substrata same
EUNIS Habitat Classification 200308 A5.1 Deep-sea rock and artificial hard substrata same
EUNIS Habitat Classification 200202 A5.1 Deep-sea rock and artificial hard substrates same
EUNIS Habitat Classification 199910 A5.1 Bathyal zone hard substrates same
EUNIS Habitat Classification 199811 A5.1 Bathyal zone rock (continental slope floor) same
Palaearctic Habitat Classification 199905 11.211 Bathyal benthic communities wider
Palaearctic Habitat Classification 1997 11.211 Bathyal benthic communities wider
Palaearctic Habitat Classification 1996 11.211   wider
Palaearctic Habitat Classification 1993 11.211   wider
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