Pontic mediolittoral sands
|Red List habitat type||code BLSA2.2x|
|Source||European Red List habitat factsheet|
|European Red List of habitats reports|
|European Red List of habitats (Excel table)|
This habitat occurs in the mediolittoral zone in areas of coarse, medium and fine sands. It is typically exposed, moderately exposed or sheltered from wave action.
The dominant environmental conditions which define the sediment characteristic and species composition are high levels of physical disturbance from wave action, wide temperature variability, and periods of desiccation. In the microtidal Black Sea (tidal range of about 0.3 m) this habitat is limited to narrow beach strip covered by the swash.
Community composition depends on grain size and origin of sand (siliceous/calcareous, biogenic/abiogenic) with three associated biotopes distinguished. Diversity is usually low due to high physical disturbance from wave action but abundances may be high.
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 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.
Synthesis of Red List assessment
|Red List Category||Red List Criteria|
|Red List Category||Red List Criteria|
Confidence in the assessment
Pressures and threats
- Urbanisation, residential and commercial development
- Other urbanisation, industrial and similar activities
- Human intrusions and disturbances
- Other human intrusions and disturbances
- Trampling, overuse
- Nutrient enrichment (N, P, organic matter)
- Natural System modifications
- Human induced changes in hydraulic conditions
- Removal of sediments (mud...)
- Extraction of sea-floor and subsoil minerals (e.g. sand, gravel, rock, oil, gas)
Habitat restoration potential
Trends in extent
Average current trend in quantity
Trends in quality
Average current trend in quality
Conservation and management needs
Raised public awareness of ecological value and vulnerability of the habitat, enhanced legal protection for the habitat and key species (such as additions to the EU Habitats Directive), establishment of a unified list of Black Sea species and habitats requiring conservation measures), and designation or extension of MPAs which can provide an additional legal framework to support delivery of conservation objectives.
List of conservation and management needs
- Measures related to marine habitats
- Other marine-related measures
- Measures related to spatial planning
- Establish protected areas/sites
- Legal protection of habitats and species
- Measures related to urban areas, industry, energy and transport
- Other measures
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)|
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.|
EOO = the area (km2) of the envelope around all occurrences of a habitat (calculated by a minimum convex polygon).