Aphanizomenon
| Aphanizomenon | ||||||||||
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| Systematics | ||||||||||
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| Scientific name | ||||||||||
| Aphanizomenon | ||||||||||
| Kützing 1846 |
Aphanizomenon is a genus of Cyanobacteria (previously called "blue-green algae"). Typical representatives are the slim water needle ( A. gracile ) and the green span alga (or sickle alga of carp pond farming ) ( A. flos-aquae ).
20 to 50 cells of each aphanizomenon species form thread-like colonies, which in turn cluster together in clusters so that macroscopically visible aggregates arise. These float in the water and create the impression of larch needles . A. flos-aquae in particular occurs in abundance in the form of water flowers (name!). Carp breeders mistakenly value them as a sign of good fertility in the affected pond, and their occurrence unmistakably indicates a one-sided phosphate over- fertilization.
literature
- Helmut Pankow: Algae flora of the Baltic Sea. II. Plankton. Stuttgart 1976 ISBN 3-437-30226-4
- Heinz Streble , Dieter Krauter : Life in a drop of water. Microflora and microfauna of freshwater. An identification book. 4th edition. Franckh, Stuttgart 1978, ISBN 3-440-04000-3 .
- Kurt Bauer: On the importance of carbon dioxide in carp ponds. Österreichs Fischerei 44 (1991) pp. 49-64