Saccorhiza polyschides
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| ( Lightfoot ) Batters |
Saccorhiza polyschides is a species of brown algae from the order of the Tilopteridales . The annual species populates the gaps in the seaweed forest off the coasts of the north-east Atlantic and North Sea.
description
Saccorhiza polyschides is an annual dark brown seaweed that can usually reach 1 to 3 m (rarely up to 4, maybe up to 10 m) in length. Its thallus is divided into a basal tuber, a stem and a leaf-like surface ( phylloid ).
At the base, a thickened, hollow, yellow-brown bulb with a diameter of 30 to 50 cm surrounds the original anchoring organ. It is densely covered with warty growths. Because of this basal structure, the seaweed is called "furbellows" (= fur bellows) or "sea hedgehog" (= sea hedgehog). The stem is flattened, often widened like a wing at the edge and covered with symmetrical undulating folds in the lower part. At the base, the stem is twisted once in a spiral. The leathery phylloid is flat, broadly oval and irregularly divided into finger-like bands. Young phylloids appear spotted by tufts of hair.
Due to the hedgehog-like tuber and the flat, characteristic stem, Saccorhiza can be easily distinguished from the Laminaria species with which it often occurs together.
Occurrence
The distribution area of saccorhiza polyschides located in the eastern North Atlantic along the coasts of Norway as far as Morocco and Ghana and the Western Mediterranean (Mauritania). It also occurs in the North Sea near Helgoland .
Saccorhiza polyschides inhabits the lower tidal zone and the shallow sublittoral to depths of 2 to 19 m below the low water line. As annual species it rapidly fills gaps in Laminaria - kelp beds , unable to compete with the perennial Tangen.
Systematics
It was first described in 1777 by John Lightfoot under the name Fucus polyschides (in: Flora Scotica 2, pp. 936-938). Edward Arthur Lionel Batters placed the species in the genus Saccorhiza in 1902 (in: A catalog of the British marine algae . Journal of Botany, British and Foreign 40, p. 48).
Synonyms of saccorhiza polyschides (Lightfoot) Batters are Alaria pylaiei var. Grandifolia (J.Agardh) Jónsson, Fucus bulbosus Hudson, Fucus polyschides Lightfoot, gigantea bulbosa Stackhouse, Haligenia bulbosa Decaisne, Laminaria blossevillei Bory de Saint-Vincent, Laminaria bulbosa JVLamouroux, Phasgonon bulbosum (Hudson) SFGray, Phycocastanum bulbosum Kützing, Saccorhiza bulbosa J. Agardh and Ulva bulbosa APde Candolle.
Sacchorhiza polyschides belongs to the family Phyllariaceae in the order of the Tilopteridales . The genus Saccorhiza includes another species, Saccorhiza dermatodea (Bachelot de la Pylaie) J.Agardh, which is widespread in the arctic .
swell
- Wolfram Braune: marine algae. A color guide to the common benthic green, brown and red algae of the world's oceans . Ruggell: Gantner, 2008, ISBN 978-3-906166-69-8 , pp. 208-209. (Sections Description, Occurrence)
- Michael D. Guiry, GM Guiry: Saccorhiza polyschides - In: Algaebase - World-wide electronic publication, National University of Ireland, Galway , accessed April 24, 2012 (sections on systematics, occurrence)
Individual evidence
- ↑ a b Michael Guiry: The Seaweed Site: information on marine algae: Saccorhiza polyschides , accessed on April 24, 2012.
