Communities of Mediterranean estuarine rock
Quick facts
Red List habitat type | code MEDA3.36 |
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Threat status | |
Europe | Vulnerable |
EU | Vulnerable |
Relation to |
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Source | European Red List habitat factsheet |
European Red List of habitats reports | |
European Red List of habitats (Excel table) |
Summary
This habitat is composed of intertidal and shallow subtidal rocky habitats which support faunal-dominated communities, with seaweed communities only poorly developed or absent. The variations associated communities are linked to climatic conditions, mainly the very great seasonal differences in temperature and salinity, which in the summer is particularly warm salty water and in the winter very low temperatures and sometimes brackish water.
The habitat supports species that are able to withstand quick variations in environmental conditions such as salinity. Sudden influxes of salt water and drying up in the summer create recurrent disturbances that sometimes cause populations to disappear. In this case, recolonisation will always be very rapid. In the Adriatic the characteristic species of this association is the endemic brown alga Fucus virsoides.
Indicators of quality:
Standard biotic and abiotic indicators have been used to describe marine habitat 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 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.
Threat status
Synthesis of Red List assessment
There is a lack of quantiative data however expert opinion is that it is reasonable to presume that this habitat has suffered declines in both quantity and quality in the last 50 years. The pressures leading to such declines are predicted to continue therefore a continuing decline is likely. This habitat has therefore been assessed as Vulnerable for both the EU 28 and EU 28+.
EU | |
Red List Category | Red List Criteria |
Vulnerable | A1, C/D1 |
Europe | |
Red List Category | Red List Criteria |
Vulnerable | A1, C/D1 |
Confidence in the assessment
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
Trends in extent |
|
Average current trend in quantity |
|
Decreasing | Decreasing |
EU28 | EU28+ |
Trends in quality |
|
Average current trend in quality |
|
Decreasing | Decreasing |
EU28 | EU28+ |
Conservation and management needs
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
Distribution
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) |
---|---|---|---|---|
Adriatic Sea | Present | Unknown | Decreasing | Decreasing |
Aegian-Levantine Sea | ||||
Ionian Sea and the Central Mediterranean Sea | ||||
Western Mediterranean Sea |
Extent of Occurrence, Area of Occupancy and habitat area
Extent of Occurrence (EOO) (Km2) | Area of Occupancy (AOO) | Current estimated Total Area | Comment | |
---|---|---|---|---|
EU28 | 60,721 | 9 | Unknown | This habitat is present in all the Mediterranean sub-basins. AOO figures are believed to be an underestimate. |
EU28+ | 9 | Unknown | This habitat is present in all the Mediterranean sub-basins. AOO figures are believedto be an underestimate. |
EOO = the area (km2) of the envelope around all occurrences of a habitat (calculated by a minimum convex polygon).
Characteristic species
Legal status
Relation to other habitat types mentioned in legal instruments
Legal text | Annex | Name in legal text | Code in legal text |
Habitat type relationship |
More information |
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Council Directive 92/43/EEC of 21 May 1992 on the conservation of natural habitats and of wild fauna and flora - consolidated version 01/01/2007 | Annex I: natural habitat types of community interest whose conservation requires the designation of special areas of conservation | Estuaries | 1130 | Narrower | http://ec.europa.eu/environm...rective/index_en.htm |