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

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

Sîudia bot. hung. 36, pp. 21^12, 2005 MOSS INHABITING SILICEOUS ALGAE FROM HUNGARIAN PEAT BOGS K. BUCZKÓ

1 and A. WOJTAL

2 'Department of Botany, Hungarian Natural History Museum H-1476 Budapest, Pf. 222, Hungary; E-mail: buczko@bot.nhmus.hu 2

Department of Phycology, W. Szafer Institute of Botany, Polish Academy of Sciences Lubicz 46, PL-31-512 Krakow, Poland; E-mail: wojtal® ib-pan.krakow.pl Comparative analysis of LM and SEM documentation of Bacillariophyceae and Chrysophycean stomatocysts inhabiting peat mosses revealed new results for these groups. 97 diatom taxa and some Chrysophycean stomatocyst types were identified on 13 peat moss species from 11 localities. 6 diatoms are new records for Hungary. The alarming diminishing of the mires' territory in the Carpathian Basin encouraged us to contribute to the knowledge and document siliceous algae living here. The data on Chrysophycean stomatocysts from Hungarian peat bogs are published for the first time. The high species diversity in Eunotia and Pinnularia was characteristic to the diatom vegetation of the mires. Key words: bogs, bryophytic diatoms, Chrysophycean stomatocysts, coexistence, mires INTRODUCTION Peat bogs possess important ecological properties, far in excess of their spatial extent. Moreover, their territory is expected to diminish in response to drying up related to anthropogenic and climatic factors. Nutrient-poor peat bogs are one of the most important centres for maintaining the biodiversity of sensitive to eutrophication algae but unfortunately also one of the most threatened oligotrophic biotopes in Europe. Yet, although mires have received some attention of almost every Hungarian algologist, and they have published some indispensable data on the algae of the mires, the knowledge of these biota still remained very incomplete. Such works include the most comprehensive elaboration of UHERKOVICH (1979), BORICS (2001), and BORICS et al. (2003). The mires with their rich moss vegetation provide excellent opportunity to study the coexistence of mosses and their algal assemblages. The term of "bryophytic diatoms" was first recommended by JOHANSEN (1999) on the basis of the apparent uniqueness of the diatoms living in association with mosses. Data on this subject have been accumulated as shown by numerous publications dealing with the "bryophytic" or moss diatoms (e.g. ANDO 1978, MAYAMA 1993, CANTONATI 2001, BERTRAND et al. 2004), though the intensive studies Studia Botanica Hungarica 36, 2005 Hungarian Natural History Museum, Budapest