Bristle red alga

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Bristle red alga
Bristle red alga (Lemanea fluviatilis), illustration (left side)

Bristle red alga ( Lemanea fluviatilis ), illustration (left side)

Systematics
Sub-stem : Rhodophytina
Class : Florideophyceae
Order : Batrachospermales
Family : Lemaneaceae
Genre : Lemanea
Type : Bristle red alga
Scientific name
Lemanea fluviatilis
( L. ) C. Agardh

The bristle red alga ( Lemanea fluviatilis ) is a species of red algae that occurs in Europe and that needs unpolluted river headwaters. It is therefore one of the comparatively few representatives of red algae that can be found in fresh water.

features

The alga forms beds of barely branched threads that are up to half a millimeter thick and are in dense, black-violet clusters. These filamentous bearings are nodularly structured by deep black bumps. The antheridia are formed in the humps . The thallus is hollow. It consists of a central thread and a cortex consisting of three layers, in the outer cells of which the majority of the chloroplasts are located. In the area between two nodes are four basal cells arranged crosswise, which extend from the central thread to the cortex. Long threads run from the peripheral ends of the basal cells to the knot. The threads are five to 15 cm long. The cortex cells are sometimes only 5 micrometers in size.

Occurrence

The bristle red alga is also found in Central Europe in clean cold water streams, especially in the low mountain range. It grows on submerged stones and on wood and, like other limnic red algae of the genus Lemanea , is considered the leading organism of the trout region .

In Germany the species is listed as "endangered" on the Red List .

literature

Individual evidence

  1. ↑ Federal Agency for Nature Conservation (Ed.): Red List of Endangered Plants in Germany . Publication series for vegetation science issue 28, 1996. ( PDF online )

Web links

Commons : Bristle Red Alga ( Lemanea fluviatilis )  - Collection of images, videos and audio files