B. Papp szerk.: Studia Botanica Hungarica 36. 2005 (Budapest, 2005)

Buczkó, Krisztina; Wojtal, A.: Moss inhabiting siliceous algae from Hungarian peat bogs

Szakonyfalvi patak: On the 3 peat moss samples 19 diatoms could be collected. A small, recently separated genus, Chamaepinnidaria was peculiar to this locality. The Shannon diversity is 2.59, of a medium value. The ratio of cysts/total siliceous algae is 23%. Felsőszölnök: Altogether only 8 taxa were recorded, most of them are typical acidophilous bog diatoms: Eunotia bilunaris var. mucophila (most abundant) and Eunotia lapponica were often found. The value of Shannon diversity is 1.72, low. The ratio of cysts/total siliceous algae is 7%. DISCUSSION The main purpose of the study was to collect records on the floristics and characteristics of the assemblages (if any) of peat moss inhabiting diatoms. Additionally, we obtained some preliminary data also on Chrysophycean stomatocysts. Their ratio (cysts/all siliceous algae) is varying on a broad scale. This ratio is smaller on the large mires (which may be regarded as the more stable bogs), meaning that there are less stomatocysts and at the same time more diatoms. But in the smaller, periodically drying-up mires this ratio is higher, to such a degree that the cysts become entirely dominant (most typically, Fekete-tó). The increasing ratio of stomatocysts may be attributed to the Chrysophytes preparing for the resting stage. The lack of sufficient records on Chrysophycean stomatocysts in Hungary is one reason, which makes the above records valuable. The "man of vision" in Hungarian mire algology, Borics, has not reported on mass occurrences of stomatocysts in his large-scale investigation of mires (BORICS 2001, and Borics, pers. com.). Vizkelety has only reported on the subdominance of cysts of Ochromonas fragilis in Fekete-tó (VÍZKELETY 1987). Comparing our diatom list with that of the Red list of the Hungarian algae (NÉMETH 2005) 10 of the 97 diatom taxa fall within some of the threatened categoFigs 70-81. Peat moss inhabiting diatoms. The scale bar is 5 urn. 70 = Cyst resembling Stomatocyst 134 Duff and Smol. 70a = Nagy-Mohos-tó (SEM), 70b = Nagyláp (Kőszeg) (LM); 71 = Cyst resembling Stomatocyst 6 Duff and Smol, but the collar morphology is closer to Stomatocyst 86., Fekete-tó; 72 = Cyst resembling Stomatocyst 378 Taylor and Smol, 9 urn diameter Nagy-Mohos-tó; 73 = Non-spherical no collar, no ornamentation stomatocyst, Nagyláp (Kőszeg); 74 = Two different spherial stomatocysts lacking a collar or ornamentation Nagyláp (Kőszeg). The bigger one resembles Stomatocyst 42 Duff and Smol, the smaller one resembles Stomatocyst 189 Zeeb and Smol; 75 = Unidentified cyst, Bábtava; 76 = Reticulum regular, Nagyláp (Kőszeg); 77 = Reticulum variable, Fekete-tó; 78 = Cyst resembling Stomatocyst 91 Duff and Smol, Bábtava; 79 = Trachelomonas sp.?, Bábtava; 80 = Unidentified cyst, Fekete-tó; 81 = Spheroidal Carbonaceous Particles (SCP), indicator of air-borne pollution from oil burning, Nagyláp (Kőszeg).