Communities of Marmara infralittoral mud estuarine
Quick facts
| Red List habitat type | code BLSA5.32 |
|---|---|
| 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 occurs mainly in sheltered inlets along and after estuaries, where wave exposure is low enough to allow fine sediments to settle. It is characterized by a variable salinity range from brackish to fully marine conditions. In all cases, the resident populations comprise a small number of species that are strongly dominant in number and weight. These are species that are able to withstand violent variations in environmental conditions, among which salinity is only one example. Sudden influxes of salt water create recurrent disturbances that sometimes cause populations to disappear. Often, especially in shallower areas, beds of Cymodocea nodosa are present.
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 pontential indicators of quality for this specific habitat are the presence and abundance of indicated characteristic species.
Threat status
Synthesis of Red List assessment
| EU | |
| Red List Category | Red List Criteria |
| n/a | |
| Europe | |
| Red List Category | Red List Criteria |
| Data Deficient | - |
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 |
|
No occurrence  |
Unknown  |
| EU28 | EU28+ |
Trends in quality |
|
Average current trend in quality |
|
| No occurrence |
Unknown |
| 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
- Managing marine traffic
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) |
|---|---|---|---|---|
| Sea of Marmara | Present | 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+ | 1 | Unknown | EOO and AOO have been calculated on the available data. |
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 |
|---|---|---|---|---|---|
| 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 |
