Gutter wrack

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Gutter wrack
Channel wrack (Pelvetia canaliculata)

Channel wrack ( Pelvetia canaliculata )

Systematics
without rank: Stramenopiles (stramenopiles)
without rank: Brown algae (Phaeophyceae)
without rank: Fucales
Family : Fucaceae
Genre : Pelvetia
Type : Gutter wrack
Scientific name
Pelvetia canaliculata
( Linnaeus ) Decaisne & Thuret
dry gutter wrack
Gutterweed colony

The gullet wrack ( Pelvetia canaliculata ) is a perennial and very slow-growing seaweed from the group of brown algae . It is common in the northeast Atlantic.

description

The gutter is anchored to the ground with an adhesive disc. It has a tufted, firm, fleshy thallus eight to fifteen centimeters long, which branches out in multiple bifurcations. The fork branches are narrow like a ribbon, their width is only three to five millimeters. The edges are slightly folded in, so that a channel is formed on the underside, in which the moisture is retained when the water is low. The thallus has neither a midrib nor swim bladders or dimples. The color of the kelp is yellow-brown to olive-brown, often turning black when dry.

At the ends of the thallus, numerous narrow, elongated, warty receptacles with a length of 1 to 3 cm, which can sometimes be forked, arise at the time of reproduction . As a representative of the Fucales , the Rinnentang is a diplont without a generation change.

ecology

The gutter wrack is usually infected with a fungus that is believed to help the kelp survive in the upper intertidal zone.

Occurrence

The gutter wrack is widespread in the eastern North Atlantic from Norway and Iceland to Portugal . Although it is also found in the North Sea and the Baltic Sea , it has not yet been found near Heligoland .

It forms large stocks of rocks in the uppermost intertidal zone , often also in places exposed to the surf. It can penetrate into the splash zone.

Systematics

The first description of the gullet was made in 1767 by Carl von Linné under the name Fucus canaliculatus (in: Systema naturae , Volume 2, p. 716). Joseph Decaisne and Gustave Adolphe Thuret put the species in the genus Pelvetia in 1845 (in: Annales des Sciences Naturelles , Botanique, Troisième série 3: p. 13).

Synonyms for Pelvetia canaliculata (L.) Decaisne & Thuret are Ascophylla canaliculata (L.) Kuntze , Ascophyllum canaliculatum (L.) Kuntze , Fucodium canaliculatum (L.) J. Agardh , Fucus canaliculatus L. , Fucus excisus L. and Halidrys canaliculata (L.) Stackhouse .

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. 238-239. (Sections Description, Occurrence)

Individual evidence

  1. ↑ a b c Michael Guiry: The Seaweed Site: information on marine algae: "Pelvetia canaliculata" , accessed April 13, 2012
  2. ↑ a b c Michael D. Guiry, GM Guiry: Pelvetia canaliculata. In: Algaebase - World-wide electronic publication, National University of Ireland, Galway , accessed April 13, 2012
  3. ↑ Dirk Schories, Uwe Selig, Hendrik Schubert: Species and synonym list of the German marine macroalgae based on historical and recent records (list of species and synomes of macroalgae in German coastal waters - evaluation of historical and recent findings) . In: Rostock. Marine biologist Contribution , issue 21, 2009, pp. 7-135. PDF file

Web links

Commons : Rinnentang ( Pelvetia canaliculata )  - Album with pictures, videos and audio files