EUNIS habitat classification 2012 > A - Marine habitats > A2 - Littoral sediment > A2.3 - Littoral mud > A2.32 - Polychaete/oligochaete-dominated upper estuarine mud shores > A2.323 - Tubificoides benedii and other oligochaetes in littoral mud

Tubificoides benedii and other oligochaetes in littoral mud

English name: Tubificoides benedii and other oligochaetes in littoral mud

Description (English)

Extreme upper estuarine fine sandy mud, sometimes with a fine sand fraction, in very sheltered conditions and subject to reduced salinity. An anoxic layer is usually present within the upper 3 cm of the sediment. The infaunal community is extremely poor, consisting almost exclusively of oligochaetes, including Tubificoides benedii and, more rarely, Heterochaeta costata. The only polychaete species that may occur is Capitella capitata, which may be common. The sediment may form steep banks in upper parts of macro-tidal estuaries or along saltmarsh creeks. Vaucheria species may form a film on the sediment surface along such creeks, and juvenile shore crabs Carcinus maenas may be common. At the very upper end of estuaries, the oligochaetes Limnodrilus spp. and Tubifex tubifex may be found.
Situation: There are three oligochaete dominated upper estuarine mud biotopes. This unit is the most extreme upper estuarine biotope, occurring at the head of estuaries where there is no strong river flow and hence conditions are very sheltered, and there is a very strong freshwater influence. Further towards the mid estuary, this biotope may occur at the top of the shore, with A2.3223 further down. Unit A2.321 occurs furthest towards the mid estuary, or on the lower shore with A2.3223 and A2.323 higher up.
Temporal variation: Green algae such as Enteromorpha spp. may form mats on the surface of the mud during the summer months.

Source: EUNIS habitat classification

Quick facts

EUNIS habitat type code A2.323
Bern Convention Included in a Resolution 4 habitat type at a higher level (A2.3)

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Species mentioned in habitat description

Invertebrates Capitella capitata
Invertebrates Carcinus maenas
Invertebrates Heterochaeta costata
Invertebrates Tubifex tubifex
Invertebrates Tubificoides benedii
Species scientific name English common name Species group
Capitella capitata Invertebrates
Carcinus maenas Invertebrates
Heterochaeta costata Invertebrates
Tubifex tubifex Invertebrates
Tubificoides benedii Invertebrates

Other classifications

Classification Code Habitat type name Relationship type
Marine Habitat Classification Britain/Ireland 0405 LS.LMu.UEst.Tben <I>Tubificoides benedii</I> and other oligochaetes in littoral mud source
CORINE Land Cover 4.2.3. Intertidal flats n/a
For relation to plant communities (syntaxa), see Vegetation types

History

Classification Code Habitat type name Relationship type
EUNIS Habitat Classification 200410 A2.323 Tubificoides benedii and other oligochaetes in littoral mud same
EUNIS Habitat Classification 200308 A2.373 Hediste diversicolor and oligochaetes in low salinity mud shores overlap
EUNIS Habitat Classification 200202 A2.373 Hediste diversicolor and oligochaetes in low salinity mud shores overlap
EUNIS Habitat Classification 199910 A2.323 Hediste diversicolor and oligochaetes in low salinity mud shores overlap
MNCR BioMar 97.06 (Britain & Ireland) LMU.Mu.HedOl Hediste diversicolor and oligochaetes in low salinity mud shores overlap
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