BIOTIC Species Information for Chorda filum
Click here to view the MarLIN Key Information Review for Chorda filum
Researched byNicola White Data supplied byMarLIN
Refereed byDr Stefan Kraan
Distribution and Habitat
Distribution in Britain & IrelandAll coasts of Britain and Ireland, but rarer in south east England.
Global distributionSee additional information.
Biogeographic rangeNot researched Depth rangeRock pools down to 5m.
MigratoryNon-migratory / Resident   
Distribution Additional InformationGlobal distribution
Canada (Arctic), Alaska, NW Atlantic from Labrador to New Jersey, Greenland, Iceland, Spitsbergen, Norway, Sweden, Denmark, The Netherlands, Belgium, the Baltic, the Faroes, France, Spain, Portugal, Canary Islands, Greece, China, Japan and south Kurile Islands, NE Pacific and the Bering Strait.

Chorda filum occurs in sheltered bays, estuaries, lagoons and sea lochs. It is rarely found on the open coast and is completely absent from exposed shores. The plants occur in clumps on a range of unstable, small objects such as pebbles and shells. It may also be found on sand and detritus but it will not remain for long on this substratum (S. Kraan, pers. comm.). They are also epiphytic on %Zostera marina% and %Fucus vesiculosus%. During stormy weather, plants may be washed to more sheltered locations where they continue development. Chorda filum has considerable tolerance to reduced salinities and extends into river mouths and the Baltic, where it grows at 3.5 psu. However, plants that grow in fully marine conditions cannot withstand immersion in freshwater for 2 hours (Russell, 1985).


Substratum preferencesMuddy gravel
Pebbles
Gravel / shingle
Mixed
Algae
Physiographic preferencesStrait / sound
Sealoch
Ria / Voe
Estuary
Isolated saline water (Lagoon)
Enclosed coast / Embayment
Biological zoneLower Infralittoral
Upper Infralittoral
Sublittoral Fringe
Wave exposureSheltered
Very Sheltered
Tidal stream strength/Water flowModerately Strong (1-3 kn)
Weak (<1 kn)
SalinityLow (<18 psu)
Reduced (18-30 psu)
Full (30-40 psu)
Variable (18-40 psu)
Habitat Preferences Additional Information
Distribution References South & Burrows, 1967, Russell, 1985, Norton & South, 1969, Hardy & Guiry, 2003,
About MarLIN | Contact, Enquiries & Feedback | Terms & Conditions | Funding | Glossary | Accessibility | Privacy | Sponsorship

Creative Commons License BIOTIC (Biological Traits Information Catalogue) by MarLIN (Marine Life Information Network) is licensed under a Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales License. Permissions beyond the scope of this license are available at http://www.marlin.ac.uk/termsandconditions.php. Note that images and other media featured on this page are each governed by their own terms and conditions and they may or may not be available for reuse. Based on a work at www.marlin.ac.uk.