Red List habitat classification > RL - Marine habitats > RLBLS - Black Sea > BLSA5.46 Communities of Marmara infralittoral (coastal) detritic bottoms

Communities of Marmara infralittoral (coastal) detritic bottoms

Quick facts

Red List habitat type code BLSA5.46
Threat status
Europe Data Deficient
EU n/a
Relation to
Source European Red List habitat factsheet
European Red List of habitats reports
European Red List of habitats (Excel table)

Summary

This habitat is usually associated with the lower infralittoral zone. In the Sea of Marmara this consists of two layers, a less saline upper layer (influenced by inflowing water from the Black Sea) and a more saline lower layer (influenced by the Mediterranean Sea). The nature of the substratum varies widely and depends largely on the typology of the adjacent coast and of nearby infralittoral formations. This implies that substrata can sometimes be gravels and sands originating from predominant local rocks, sometimes shell debris from various molluscs (mainly Mytilus galloprovincialis). The interstices between these various components are partially filled by a greater or lesser proportion of sand and mud.

Indicators of quality:

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

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 therefore considered to be Data Deficient.
EU
Red List Category Red List Criteria
n/a -
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

  • Agriculture
    • Use of biocides, hormones and chemicals
    • Fertilisation
  • Urbanisation, residential and commercial development
    • Urbanised areas, human habitation
    • Industrial or commercial areas
    • Discharges
  • Biological resource use other than agriculture & forestry
    • Marine and Freshwater Aquaculture
    • Fishing and harvesting aquatic resources
  • Pollution
    • Pollution to surface waters (limnic, terrestrial, marine & brackish)
    • Marine water pollution
    • Soil pollution and solid waste (excluding discharges)

Habitat restoration potential

The capacity of this habitat to recover once severely damaged is unknown.

Trends in extent

Average current trend in quantity

No occurrence Unknown
EU28 EU28+

Trends in quality

Average current trend in quality

No occurrence Unknown
EU28 EU28+

Conservation and management needs

Legislation regulating fisheries exist in this area, but precise management measures aimed at conserving this particular habitat are not in place. Direct engagement of scientists and conservationists in the planning of the management process, analysis of social and economic costs and benefits of different management options, and involvement of diverse stakeholders will be essential to the successful implementation of conservation actions.

List of conservation and management needs

  • Measures related to wetland, freshwater and coastal habitats
    • Restoring/Improving water quality
    • Restoring coastal areas
  • Measures related to marine habitats
    • Restoring marine habitats
  • Measures related to spatial planning
    • Establish protected areas/sites
    • Legal protection of habitats and species
  • Measures related to hunting, taking and fishing and species management
    • Regulation/Management of fishery in marine and brackish systems
  • Measures related to urban areas, industry, energy and transport
    • Urban and industrial waste management
    • Managing marine traffic

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)
Sea of Marmara Present Unknown Unknown Unknown

Extent of Occurrence, Area of Occupancy and habitat area

Extent of Occurrence (EOO) (Km2) Area of Occupancy (AOO) Current estimated Total Area Comment
EU28 N/A N/A N/A This habitat is only present in the Sea of Marmara therefore it does not occur in the EU28
EU28+ 43 Unknown EOO and AOO have been calculated on the available data.
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.
Algae Gracilaria verrucosa
Invertebrates Asterias rubens
Invertebrates Asterina gibbosa
Invertebrates Astropecten irregularis
Invertebrates Astropecten spinulosus
Invertebrates Botryllus schlosseri
Invertebrates Ciona intestinalis
Invertebrates Clibanarius erythropus
Invertebrates Marthasterias glacialis
Invertebrates Mytilus galloprovincialis
Invertebrates Ocnus planci
Invertebrates Ophiothrix fragilis
Invertebrates Pagurus anachoretus
Invertebrates Philine aperta
Invertebrates Pisidia bluteli
Invertebrates Pisidia longimana
Invertebrates Pteroeides spinosum
Invertebrates Veretillum cynomorium
Species scientific name English common name Species group
Gracilaria verrucosa Algae
Asterias rubens Invertebrates
Asterina gibbosa Invertebrates
Astropecten irregularis Invertebrates
Astropecten spinulosus Invertebrates
Botryllus schlosseri Invertebrates
Ciona intestinalis Invertebrates
Clibanarius erythropus Invertebrates
Marthasterias glacialis Invertebrates
Mytilus galloprovincialis Invertebrates
Ocnus planci Invertebrates
Ophiothrix fragilis Invertebrates
Pagurus anachoretus Invertebrates
Philine aperta Invertebrates
Pisidia bluteli Invertebrates
Pisidia longimana Invertebrates
Pteroeides spinosum Invertebrates
Veretillum cynomorium Invertebrates

Vegetation types

Relation to vegetation types (syntaxa)

Not available

Other classifications

Not available
European Environment Agency (EEA)
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