Fucoids on tide-swept Atlantic littoral rock
|Red List habitat type||code NEAA1.15|
|Source||European Red List habitat factsheet|
|European Red List of habitats reports|
|European Red List of habitats (Excel table)|
This habitat is characterised by fucoid seaweeds in tide-swept conditions on sheltered to extremely sheltered mid-eulittoral to lower eulittoral rocky shores, such as narrow channels in sea lochs and estuaries. It occurs below the band of Fucus spiralis and F. vesiculosus on the shore but above the kelp dominated zone in the sublittoral fringe. The middle shore can be dominated by the wrack Ascophyllum nodosum, while Fucus serratus is dominating the lower shore. The high levels of water movement encourages a rich associated fauna including several filter-feeding groups. In the Macaronesian Islands, Cystoseira spp. are the dominant fucoid.
Indicators of quality:
Both biotic and abiotic indicators have been used to describe marine habitat quality. These include: the presence of characteristic species as well as those which are sensitive to the pressures the habitat may face; water quality parameters; levels of exposure to particular pressure, 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. Indicators which have been developed for the assessment of ecological quality of coastal water bodies for the Water Framework Directive (WFD) that are relevant to this habitat include a consideration of macroalgae species richness, proportions of different taxa of algae present, and the abundance and coverage of the rocky surfaces by typical species.
Synthesis of Red List assessment
Survey information confirms that this habitat has a widespread distribution in the North East Atlantic. It has been studied in detail in some localities however there is insufficient information to determine whether there have been any historical, recent and possible future trends in quantity or quality.
This habitat has a large EOO and AOO, and therefore qualifies as Least Concern under criterion B. However the habitat is assessed as Data Deficient both at the EU 28 and EU 28+ levels because of the lack of information on its extent and trends in quantity and quality.
|Red List Category||Red List Criteria|
|Red List Category||Red List Criteria|
Confidence in the assessment
Pressures and threats
- Urbanisation, residential and commercial development
- Urbanised areas, human habitation
- Biological resource use other than agriculture & forestry
- Fishing and harvesting aquatic resources
- Natural System modifications
- Human induced changes in hydraulic conditions
- Modification of hydrographic functioning, general
Habitat restoration potential
Fucus spp have life spans of the order of 3-4 years and species such as F. vesiculosus and F. serratus recruit readily to cleared areas, especially in the absence of grazers.
Trends in extent
Average current trend in quantity
Trends in quality
Average current trend in quality
Conservation and management needs
List of conservation and management needs
- Measures related to marine habitats
- Other marine-related measures
- Measures related to spatial planning
- Establish protected areas/sites
- Measures related to special resouce use
- Regulating/Managing exploitation of natural resources on sea
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)|
|Bay of Biscay and the Iberian Coast||Present||Unknown||Unknown||Unknown|
|Greater North 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||>247,890||>36||unknown||Based on a limited data set. AOO is known to be an underestimate.|
|EU28+||>36||unknown||Based on a limited data set. AOO is known to be an underestimate.|
EOO = the area (km2) of the envelope around all occurrences of a habitat (calculated by a minimum convex polygon).
|Species scientific name||English common name||Species group|
|Nucella lapillus||Dog whelk||Invertebrates|