Burgundy blood algae

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Burgundy blood algae
Planktothrix rubescens.jpeg

Burgundy blood algae ( Planktothrix rubescens )

Systematics
Trunk : Cyanobacteria (Cyanobacteria)
Class : Cyanobacteria (Cyanobacteria)
Order : Oscillatoriales
Family : Phormidiaceae
Genre : Planktothrix
Type : Burgundy blood algae
Scientific name
Planktothrix rubescens
( DC. Ex Gomont )
Anagnostidis & Komárek (1988)

The Burgundy blood algae ( Planktothrix rubescens ) is a type of filamentous cyanobacteria , or "blue-green algae". In 2002 the species of S. Suda was assigned to the genus Planktothrix , before that the species was referred to as Oscillatoria rubescens .

Surname

The name Planktothrix rubescens , derived from the Greek, means “reddish hair wandering around in the water”. In the Swiss Murten lake there are always flowers of the species that color the water reddish. This was attributed to the blood of the Burgundians slain in the battle of Murten and led to the German name Burgundy blood algae .

features

Planktothrix grows, as is typical for the Oscillatoriales , in long unbranched cell threads, also called filaments or trichomes. Neither permanent cells (akinetes) nor heterocysts are formed. The straight filaments have limited mobility and show phototaxis . They are mostly single, bundles of filaments are rarely found. Since the Burgundy blood algae contains the red pigment phycoerythrin , it is reddish in color (name!). P. agardhii , the bunch of vibrating algae , has a similar structure, but is greenish in color .

habitat

The Burgundy blood algae lives in planktonic form in fresh water, especially in deep and layered cold water lakes, for example in lakes near the Alps such as Lake Wörthersee , Mondsee , Lake Zurich or Lake Ammersee . In March 2016, when the Wörthersee was shifted due to the warming, the algae rose into the uppermost water layer with an intense red-brown color.

ecology

The species can layer itself through gas vesicles within the water column. Flowering can occur under favorable conditions. After mass reproduction, the toxin microcystin can pose a threat to aquatic organisms as well as to the drinking water supply.

Individual evidence

  1. ↑ Anagnostidis, K. & Komárek, J. (1988). Modern approach to the classification system of cyanophytes. Archives for Hydrobiology, Supplement 80
  2. ↑ Taxonomic revision of water-bloom-forming species of oscillatorioid cyanobacteria. Shoichiro Suda, Makoto M. Watanabe, Shigeto Otsuka, Aparat Mahakahant, Wichien Yongmanitchai, Napavarn Nopartnaraporn, Yongding Liu and John G. Day. International Journal of Systematic and Evolutionary Microbiology (2002), 52, 1577-1595 doi : 10.1099 / 00207713-52-5-1577 .
  3. ^ DM John, Brian A. Whitton, Alan J. Brook: The freshwater algal flora of the British Isles: an identification guide to freshwater and terrestrial algae , Volume 1. Cambridge University Press (England) 2002.
  4. ↑ R. Kurmayer, G. Christiansen, J. Fastner and T. Börner : Abundance of active and inactive microcystin genotypes in populations of the toxic cyanobacterium Planktothrix spp. Environmental Microbiology 2004 (8), 831-841. doi : 10.1111 / j.1462-2920.2004.00626.x .
  5. ↑ Heinz Streble , Dieter Krauter : Life in the water drop. Microflora and microfauna of freshwater. An identification book. 10th edition. Kosmos, Stuttgart 2006, ISBN 3-440-10807-4 .
  6. ↑ http://kaernten.orf.at/news/stories/2763697 Brown broth instead of clear Wörthersee water, orf.at, March 18, 2016, accessed March 18, 2016.