EUNIS habitat classification 2017 > M - Marine benthic habitats > MB3 - Infralittoral coarse sediment > MB35 - Mediterranean infralittoral coarse sediment > MB353 - Biocenosis of Mediterranean infralittoral pebbles

Biocenosis of Mediterranean infralittoral pebbles

Description (English)

Small strands with infralittoral pebbles are very numerous in the indentations of rocky coasts. The most typical is the biocoenosis when the pebbles are rather small. The characteristic species here are the two amphipods Melita hergensis and (Allorchestes aquilinus) Parhyale aquilina, which feed on organic detritus, and the fish Gouania wildenowii. G. willdenowi, predator on these amphipods. One finds also a characteristic crab, Xantho poressa, and several turbellerians and nemertines. After long periods of calm a thin film of diatoms is found on the pebbles. When the pebbles are larger this typical biocoenosis is often impoverished, but mixed with tolerant species coming from neighbouring rocks such as the sea-star Asterina gibbosa, the small anomuran (Porcellana bluteli) Pisidia bluteli, the gobiescoid fish (Lepadogaster gouani) L. lepadogaster, and so on. During stormy weather all the species escape from the moving pebbles to the lower parts of the boulders generally mixed with the pebbles, or to deeper bottoms, to return as soon as the sea becomes calm

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code MB353
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

Invertebrates Asterina gibbosa
Invertebrates Melita hergensis
Invertebrates Parhyale aquilina
Invertebrates Pisidia bluteli
Invertebrates Xantho poressa
Species scientific name English common name Species group
Asterina gibbosa Invertebrates
Melita hergensis Invertebrates
Parhyale aquilina Invertebrates
Pisidia bluteli Invertebrates
Xantho poressa Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 2007 (revised descriptions 2012) A5.1 Sublittoral coarse sediment narrower
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type Comment
EUNIS Habitat Classification 200410 A5.1 Sublittoral coarse sediment same
EUNIS Habitat Classification 200308 A4.73 Animal communities of deep circalittoral shell gravel bottoms narrower
EUNIS Habitat Classification 200308 A4.71 Animal communities of deep circalittoral gravel bottoms narrower
EUNIS Habitat Classification 200308 A4.1 Sublittoral coarse sediment same
EUNIS Habitat Classification 200202 A4.73 Animal communities of deep circalittoral shell gravel bottoms narrower
EUNIS Habitat Classification 200202 A4.71 Animal communities of deep circalittoral gravel bottoms narrower
EUNIS Habitat Classification 200202 A4.1 Sublittoral mobile cobbles, gravels and coarse sands same
EUNIS Habitat Classification 199910 A4.1 Sublittoral mobile cobbles, gravels and coarse sands same
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