Saccorhiza polyschides

Saccorhiza polyschides

Saccorhiza polyschides is a Braunalgenart from the order of Tilopteridales. Off the coasts of the North East Atlantic and North Sea, the annual species colonized the gaps in the kelp forest.

Description

Saccorhiza polyschides is an annual dark brown kelp, the (rarely to 4, maybe up to 10 m ) can reach length usually 1 to 3 m. Its thallus is divided into a basal tuber, a stem and a leaf-like area ( Phylloid ).

At the base surrounds a thickened hollow tuber tan from 30 to 50 cm diameter, the original anchoring member. It is densely covered with warty excrescences. Because of this basal structure of Tang is called in English " furbellows " ( = fur - bellows ) or "sea hedgehog" ( = sea urchins ). The stem is flattened on the edge often broadened wing-like and occupies the lower part with symmetrical undulating folds. At the base of the stem is twisted once spirally. The leather-like Phylloid is flat, broadly oval and irregularly divided into finger-like bands. Young phyllodes appear dotted with tufts of hair.

By hedgehog -like tuber and the flat characteristic stem Saccorhiza is easily distinguished from the Laminaria species with which it often occurs together.

Occurrence

The distribution area of Saccorhiza polyschides lies in the eastern North Atlantic along the coasts of Norway to Morocco and Ghana and in the western Mediterranean (Mauritania). It also comes in the North Sea near Helgoland.

Saccorhiza polyschides colonizes the lower intertidal and shallow subtidal to depths 2-19 m below the low water line. As an annual species fills gaps quickly in Laminaria kelp beds, without being able to compete with the perennial Tangen.

System

The first description was in 1777 by John Lightfoot under the name Fucus polyschides ( in: Flora Scotica 2, pp. 936-938 ). Edward Arthur Lionel Batters put the type in 1902 in the genus Saccorhiza ( 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 grandifolia var ( 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 Kiitzing, Saccorhiza bulbosa J.Agardh and Ulva bulbosa APDE Candolle.

Sacchorhiza polyschides belongs to the family Phyllariaceae in the order of Tilopteridales. The genus Saccorhiza still counts another way Saccorhiza dermatodea ( Bachelot de la Pylaie ) J.Agardh, the arctic is widespread.

Swell

• Wolfram Braune: seaweed. A color guide to the benthic green - brown and red algae of the 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 systematics, occurrence)