B. Papp szerk.: Studia Botanica Hungarica 33. 2002 (Budapest, 2002)
Buczkó, Krisztina: A new floristical survey of the algal flora of the Babat valley, Hungary
The uppermost ponds (Nos 10 and 11), surrounded by Salix spp., Populus spp. and Alnus glutinosa, form a semi-natural habitat. Next to the shores of the ponds Nos 8 and 9 goose breeding takes place all year round. Here, Phragmites australis and Typha spp. are living in the littoral zone of the ponds, but near the goose breeding place a considerably long section of the shore is covered by concrete. The water of these ponds is fertilised by manure of goose. The water of Aranyos stream flows from pond to pond, so the lower part of the pondsystem is also effected by the goose farm. The following names will be used for the ponds: No. 11 = Upper Pond, No. 10 = Alder Swamp Pond, No. 9 = Upper Goose Pond, No. 8 = Lower Goose Pond, No. 3-4 = Angler Pond, and No. 1-2 = Lower Pond. Methods Alga samples were collected tree times in 2001 (11.03.2001, 18.05.2001 and 28.07.2001). Attached algae from different substrata {Phragmites, Carex sp., Typha sp., different branch pieces, Ceratophyllum sp., Lemna, mosses, (e.g. Drepanocladus), Chara sp., etc.), alga mats as well as phytoplankton samples were collected, to examine as many algae habitats as possible. For identification the following monographs and books were consulted: ANAGNOSTIDIS and KOMÁREK 1985,1988, FELFÖLDY 1972, 1985, GRIGORSZKI et al. 1999, HlNDÁK 1996, KOMÁREK 1974, KOMÁREK and ANAGNOSTIDIS 1989, 1999, KRAMMER and LANGE-BERTALOT 1986, 1988, 1991a, b, SCHMIDT and FEHÉR 1998,1999, and NÉMETH 1997a, b. MOORE's handbook (1986) was used for the identification of Chara canescens, and it was verified by KRAUSE's work ( 1997). Due to difficulties in the identification of filamentous algae (in every alga phylum) and the Centrales (Chrysophyta) group the present survey is not complete. Laboratory methods Each sample was preserved by formaldehyde solution (end concentration 2-4%). Permanent diatom slides were made, these treated with H 2 0 2 , then the preparata were embedded into Styrax. The samples and permanent slides have been deposited in the Collection Algarum of the Botanical Department of the Hungarian Natural History Museum (BP) and marked with the following collecting numbers: 2001/1-2001/14, 2001/33-2001/49, 2001/70-2001/82. RESULTS AND DISCUSSION Total number of identified taxa is 209 (Cyanobacteria: 25, Heterocontophyta: 93, Dinophyta: 4, Cryptophyta: 1, Euglenophyta: 21, Chlorophyta: 65) (Table 1). Most taxa belong to the diatoms, highly characteristic for the attached algal flora. 65 taxa come from the Chlorophyta. Interestingly, Lajos Hajdu in 1969 found most taxa belonging to Chlorophyta (115), with the genus Scenedesmus being the mostly represented. The differences in the distribution of taxa are due to the differences of the basic concept and methods of sampling: Lajos Hajdu worked only with phytoplankton, while my work focused on a different habitat. The phyto-
