L. Hably szerk.: Studia Botanica Hungarica 20. 1988 (Budapest, 1988)
Stollmayerné Boncz, Emilia: The alga species of the Csömör pool
The remaining quantities of the samples were fixed in formalin on the day of collection. After leaving the sample to settle for some days, the dense sediment was placed into bottles of 150 mis. Principally the fixed samples were identified. Diatoms were dissected by destruction with hydrogen peroxide. The following works were used to identify the species: BARTA et al. (1976), DIEL (1975), ETTL (1978), FELFÖLDY (1972, 1981), HORTOBÁGYI (1968), KADLUBOWSKA (1984), KRAMMER and LANGE-BERTALOT (1986), MROZINSKA (1985), PASCHER (1930), RIETH (1980), UHERKOVICH (1966), WOLLE (1887). I had only a light-microscope at my disposal to identify the species. Not all the species found in the samples could be identified. Mainly I was interested in the species belonging to the Cyanophyta, Chlorophyta, Xanthophyceae , and Bacillariophyceae groups. I did not identify the Cyanophyta and Chlorophyta threads as they were either very thin or identification was uncertain. The small Bacillariophyceae species, though abundant in the pool, were not identified either. This test was only carried out in order to register the different species and then to state whether it is worth studying these alga species or not, and when the samples have to be taken. No quantitative data on the species were obtained in this study. Some of the algae could only be identified to the genus (Vaucheria sp., Ulothrix sp., Zygnema sp., Oedogonium sp. ). RESULTS Taxonomic evaluation As one can read out of Table 1, there are 19 cyanophytes among the 69 species identified here. Fifteen species out of these 19 can be found both in the pool and on the island, two species were found only in the pool ( Anabaena aequalis at locality No. 1 and Plectonema gracillimum from Nos 1, 2, 3) and two only on the island ( Lyngbya cryptovaginata from localities Nos 5, 7 and Hapalosiphon hybernicus from No. 4). After thoroughly checking in the Flora et Iconographia Algarum Hungáriáé, only Anabaena and Hapalosiphon can be specially found at any peaty locality in Hungary. All the species of Xanthophyceae (7 species altogether) are from the pool, from localities Nos 1 and 3 (May, June). Nine out of the 21 Bacillariophyceae species can be found both in the pool and on the island, 9 were found only in the pool and three occurred only on the island ( Eunotia lunaris , Eunotia monodon var. maior , Nitzschia spectabilis ). Yet they are not typical turbary species. Among the 22 species of green algae nine were found both in the pool and the island, 10 were identified only in the pool, while three more species occurred only on the island ( Characium hookeri, Crucigenia quadrata , Zygnema sp. ) none of them characteristic for bogs. SEASONALITY Studying the seasonality of the groups (Table 2, Fig. 1) it can be stated that the most species occurred in June 1984 (8.8 species/sample) and in November (7 species/sample), the least number in September (4 species/sample), in October (4. 4 species/sample) and in April (4.7 species/sample), respectively. There is no essential difference between the species/sample ratio found in May, 1984 and in 1985. This value was 5. 7 species/sample in May, 1984 and 5. 5 species/sample in 1985, while 6. 5 species/sample was found in August. When studying the different groups (Table 3, Fig. 2) it can be observed that most of the Blue-green algae were found in November (20) and in June (14) while there were only three in September. The most diatoms were found in November (16) and July (12), while the minimum value could be observed in April (3). Once - during the drought in September - the sample was taken from the water gathering in an artificial hole. This must have been the reason for its zero value.
