Red List habitat classification > RL - Marine habitats > RLBLS - Black Sea > BLSA5.34 Pontic infralittoral fine mud

Pontic infralittoral fine mud

Quick facts

Red List habitat type code BLSA5.34
Threat status
Europe Data Deficient
EU Data Deficient
Relation to
Source European Red List habitat factsheet
European Red List of habitats reports
European Red List of habitats (Excel table)

Summary

These fine muddy habitats are situated in the lower infralittoral zone at the fronts formed by the mouths of large rivers (Danube, Dnepr, Bug)discharging onto the Northwestern Black Sea shelf . These fine muds mixed with terrestrial and freshwater detritus form soft, unstable deposits. Where the sediment content is lower in detritic organic particles terrigenous muds are more stable and sticky. In both zones the habitat is populated by bivalve molluscs and polychaete worms adapted to living in very soft substrata with high organic content.

Indicators of quality:

Both biotic and abiotic indicators have been used to describe marine habitat quality. These include; the presence of characteristic species and those which are sensitive to the pressures the habitat may face, water quality parameters, levels of exposure to particular pressure as well as and more integrated indices which describe habitat structure and function, such as trophic index, or successional stages of development in habitats that have a natural cycle of change over time. There are no commonly agreed indicators of quality for this habitat, although particular parameters may have been set in certain situations e.g. protected features within Natura 2000 sites, where reference values have been determined and applied on a location-specific basis.

Characteristic species
For full habitat description, please download the habitat factsheet.

Threat status

Synthesis of Red List assessment

Detailed information on the abundance and extent of this habitat is lacking. Information on the quantity and quality of this habitat including historical or recent trends is unknown. For the purposes of Red List assessment this habitat is considered to be Data Deficient.
EU
Red List Category Red List Criteria
Data Deficient -
Europe
Red List Category Red List Criteria
Data Deficient -

Confidence in the assessment

low
Red List of habitat categories and criteria descriptions

Pressures and threats

  • Biological resource use other than agriculture & forestry
    • Fishing and harvesting aquatic resources
    • Professional active fishing
  • Pollution
    • Nutrient enrichment (N, P, organic matter)
    • Input of contaminants (synthetic substances, non-synthetic substances, radionuclides) - diffuse sources, point sources, acute events
    • Marine macro-pollution (i.e. plastic bags, styrofoam)

Habitat restoration potential

There is insufficient data and knowledge of this habitat to assess its capacity to recover

Trends in extent

Average current trend in quantity

Unknown Unknown
EU28 EU28+

Trends in quality

Average current trend in quality

Unknown Unknown
EU28 EU28+

Conservation and management needs

Conservation and management measures which would benefit this habitat include implementing measures to maintain physical and biological integrity, including pollution control and regulation, improvement of water quality management outside EU member states, contingency plans to be followed in the event of a major pollution incident, survey and monitoring programmes, raised public awareness of ecological value and vulnerability.

List of conservation and management needs

  • Measures related to marine habitats
    • Other marine-related measures
  • Measures related to urban areas, industry, energy and transport
    • Other measures

Distribution

For each habitat a distribution map was produced from a wide variety of sources indicating known and potential occurrences of the habitat in 10x10 km grids within Europe. Occurrences in grid cells were given in two classes: actual distribution from relatively reliable sources (surveys, expert knowledge), and potential distribution based on models or less reliable indicators. Please download the fact sheet to see the map.

Geographic occurrence and trends

Seas Present or presence uncertain Current area of habitat (Km2) Recent trend in quantity (last 50 years) Recent trend in quality (last 50 years)
Black Sea Present Unknown Unknown Unknown
Sea of Marmara

Extent of Occurrence, Area of Occupancy and habitat area

Extent of Occurrence (EOO) (Km2) Area of Occupancy (AOO) Current estimated Total Area Comment
EU28 Unknown Unknown Unknown The habitat is known to occur in the Black Sea but there is insufficient data to accurately calculate EOO and AOO.
EU28+ Unknown Unknown The habitat is known to occur in the Black Sea but there is insufficient data to accurately calculate EOO and AOO.
AOO = the area occupied by a habitat measured in number of 10x10 km grid cells.
EOO = the area (km2) of the envelope around all occurrences of a habitat (calculated by a minimum convex polygon).

Characteristic species

The full list of characteristic species and genus are available above from the Summary. The species available in the EUNIS database are shown here.
Invertebrates Abra alba
Invertebrates Abra prismatica
Invertebrates Mysella bidentata
Invertebrates Neanthes succinea
Species scientific name English common name Species group
Abra alba Invertebrates
Abra prismatica Invertebrates
Mysella bidentata Invertebrates
Neanthes succinea Invertebrates

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Other classifications

Not available
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