Red List habitat classification > RL - Marine habitats > RLBAL - Baltic > BAL22 Sparse or no communities on Baltic infralittoral shell gravel

Sparse or no communities on Baltic infralittoral shell gravel

Quick facts

Red List habitat type	code BAL22
Threat status
Europe	Data Deficient
EU	Data Deficient
Relation to	Annex I habitat types (EU Habitats Directive)
Source	European Red List habitat factsheet
	European Red List of habitats reports
	European Red List of habitats (Excel table)

Summary

This benthic Baltic Sea habitat occurs in the photic zone with at least 90% coverage of shell gravel according to the HELCOM HUB classification. Epibenthic macrovegetation or macrofauna does not occur. The habitat is most often encountered in high energy exposure areas and therefore believed to be limited to the Baltic Proper, Belt Sea and The Sound.

Indicators of quality:

Unknown

Characteristic species

For full habitat description, please download the habitat factsheet.

Threat status

Synthesis of Red List assessment

This habitat, characterised as sparse or no communities on infralittoral shell gravel is poorly studied. It was not evaluated by HELCOM in the 2013 Red List of Habitat Assessment. Due to a lack of information on which to base a quantitative assessment or to make an assessment based on expert opinion this habitat is considered to be Data Deficient.

EU
Red List Category	Red List Criteria
Data Deficient	-

Europe
Red List Category	Red List Criteria
Data Deficient	-

Confidence in the assessment

low

Red List of habitat categories and criteria descriptions

European Red List of Habitats categories

Based on Scientific Foundations for an IUCN Red List of Ecosystems

European Red List of Habitats criteria

Reduction in quantity (area of distribution)	A	A1 Present decline (over last 50 years) A2a Future decline (over the next 50 years) A2b Future/present decline (over a 50-year period inclunding present and future) A3 Historic decline
Restricted geographic distribution	B	B1 Restricted Extent of Occurrence (EOO) B2 Restricted Area of Occupancy (AOO) B3 Present at few locations
Reduction in abiotic quality	C	C/D1 Reduction in quality over the last 50 years C/D2 Reduction in quality in the future or in a period including present and future C/D3 Historic reduction in quality
Reduction in biotic quality	D
Quantitative analysis of probability of collapse	E

From Scientific Foundations for an IUCN Red List of Ecosystems

Pressures and threats

No threats or pressures

No threats or pressures

Habitat restoration potential

Unknown

Trends in extent
Average current trend in quantity
Unknown	Unknown
EU28	EU28+

Trends in quality
Average current trend in quality
Unknown	Unknown
EU28	EU28+

Conservation and management needs

No conservation and management measures have been identified for specifically for this habitat.

List of conservation and management needs

No measures

No measure known / impossible to carry out specific measures

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)
Baltic Proper	Present	Unknown	Unknown	Unknown
Belt Sea
Gulf of Bothnia
Gulf of Finland
Gulf of Riga
The Sound

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	There is insufficient quantitative data to make an accurate estimate of EOO and AOO.
EU28+	Unknown		Unknown	There is insufficient quantitative data to make an accurate estimate of EOO and AOO.

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

Not available

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	Sandbanks which are slightly covered by sea water all the time	1110	Overlap	http://ec.europa.eu/environm...rective/index_en.htm
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	Large shallow inlets and bays	1160	Overlap

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Sections

Sparse or no communities on Baltic infralittoral shell gravel

Quick facts

Summary

Threat status

Synthesis of Red List assessment

Confidence in the assessment

European Red List of Habitats categories

European Red List of Habitats criteria

Pressures and threats

Habitat restoration potential

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

Distribution

Geographic occurrence and trends

Extent of Occurrence, Area of Occupancy and habitat area

Characteristic species

Legal status

Relation to other habitat types mentioned in legal instruments

Vegetation types

Relation to vegetation types (syntaxa)

Other classifications