Az Alpokalja természeti képe közlemények 12. (Praenorica - Folia historico-naturalia Szombathely, 2012)

7. Summary

VIZKELETY Éva - VARGA Erika: Algológiai vizsgálatok a Kis-Balaton térségében typical to find colonization of tropical species favouring a warmer climate and water temperature. Among the dominant cyanobacteria were Microcystis aeruginosa, Microcystis firma (planktonic), Lyngbya epiphytica (cosmopolitan), Lyngbya kiitzingii (appearing on cosmopolitan and filamentous algae), Anabaena affinis (planktonikus), Anabaena spiroide, and Nostoc spp. The dominant diatomic algae were Achnantes hungarica (Syn.: Lemnicola hungarica), Amphora pediculus (cosmopolitan), Diatoma vulgare (alkalibion common in the sediment of rivers and lakes), and Fragilaria brevistrata (Syn.: Pseudostaurosira brevistriata). Most of the flagellate alga taxa belonged to the genus Phacus. Most of the dominant taxa were to be found among the diatomic algae, followed by the cyanobacteria, notably the genera Microcystis and Lyngbya. Planktonic alga development did not appear as an effect of the storage because the relative frequency of algae in the planktonic alga development was only medium. The significant factor instead of planktonic algae was the mass of weed and the coating algae that spread on them. The constantly occurring algae were all common, eutrophic coating and planktonic algae that favour shallow waters. The new occurrences in the Hungarian alga flora found during sampling were the Calotrix subsimples JAO cyanobacteria, the Neidium bisulcatum var. subampliatum KRAMM. Coating alga, and the Mogueotia robusta (DE BARY) WLTTROCK green alga. In the third period (1999-2000), planktonic algae and the coating algae of weed (Ceratophyllum demersum, Stratoites aloides) were examined in the area of the submersed Ingói-berek and the Zalavári-víz. A detailed list of species appears in Table 3.1. Altogether 280 taxa were identified, 84 being Cynobacteria, 3 Xantophyceae, 126 Bacillariophyceae, 12 Euglenophyta, and 55 Chlorophyta. Diatomic algae accounted for the greatest number of taxa in every sample (skimmed and coatings) taken in every season. The algae were sparse in the sieved samples. The most varied combination of algae was found in the coating sample taken from Ceratophyllum demersum in July 1999. The coating samples frequently contained taxa of the Microcystis, Lyngbya and Oscillatoria groups. Of the diatomic algae, the highest numbers of species were found from the Cymbella, Fragilaria, Gomphonema, Ncn'icula and Nitzschia genera. The coating samples from various weeds (Ceratophyllum demersum, Stratoites aloides) were rich in species; the bed had a lesser influence on the occurrences of the various alga taxa, in which the time of sampling was decisive. Dominance relations appear in Figure 3.3. with the taxa of the Cocconeis and Fragilaria genera (Fragilaria construens Syn..Staurosira construens, Fragilaria pinnata Syn.: Staurosirella pinnata, Nitzschia amphibia, and Cocconeis placentula) dominant, along with the Anabaena affinis, Lyngbya epiphytica, Lyngbya kiitzingii, Microcystis aeruginosa, and Microcystis firma species of cyanobacteria. The constant taxa (constancy 5) were all without exception diatomic algae. New occurrences in the Hungarian alga flora found in the samples were Calotrix subsimples JAO, Neidium bisulcatum var. subampliatum KRAMM. and Mogueotia robusta (DE BARY) WITTROCK. 133