Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 69. (Budapest 1977)

P. Komáromy, Zs.: The algal flora of the Ördöglyuk cave at Szoplak (Hungary)

reflection of the light penetrating through the opening first reflected from the rock wall of the first gallery (Map 1, r). The bottom of the chamber is covered with ruble and bat guano strewn with some rotted tree trunks covered with micelia of fungi. On the northern side of the main gallery there is another narrow passage which leads to the lowest level of the cave system : long chamber, but algologically it was not examined. The known sections of the cave of hydrothermic origin are about 100 m long (PAPP — VÁRI 1959). The cave system of the Ördöglyuk is contaminated by the boots of visitors, but there are places which are suitable for collecting samples. Material and methods Different samples were collected from the cave on the 22nd of February, 1976. 1. Soil samples from different places of the first gallery and of the main gallery (marked by * in Map 1). — 2. Samples from rock wall of the first gallery (marked by b in Map 1). The soil samples were taken with a soil borer (fitted with sterile capsules). Other samples were collected with a spatula sterilized by abs. alcohol. A total of 12 samples were collected. Samples originating from rock-wall's coat were microscopically examined soon after sampling. The soil samples were kept in culture and they were examined after some eight months. From time to time the cultures were moistened with distilled water and they were grown at low light intensity similar to cave conditions. The identification of the species was made from these enrichment cultures. CHLOROPHYCEAE Chlorella fusca SHIHIRA & KRAUSS(Fig. 9). — Found on rock wall and on cave clay. Known from cultures only, it is well identifiable owing to the brown colour characteristically developing with age. Chloreila minutissima FŐTT & NOVÁKOVÁ (Fig. 10). — Found on cave clay and in cave soil rich in guano. The species was originally described from small pools but the locality of the type-strain is not known (FŐTT & NOVÁKOVÁ 1969). Chlorella zofiiiíreiisis DÖNZ (Fig. 1). — Occurring in forest soil, on the rock wall and in large quantities in cave soil. The author originally described this species from sandy soil. Chlorhormidium dissectum (Kürz.) KOM. — Found on forest soil and on rock wall. It is quite common in different soil types in Hungary, though it frequently occurs in other biotopes, too. Stichocoecus bacillaris NÄG.

— Occurring on rock wall. It is a very common and tolerant species, but here it occurred only in one of the samples in small quantity. XANTHOPHYCEAE Monodus unipapilla REISIGE (Fig. 2). —-It was found in different phenological stages in forest soil. It is a characteristic soil alga, its cells are absent from the other examined biotopes of the cave. Pleurochloris magna PETERSEN — Like Monodus unipapilla it was found in forest soil only. Vischeria stellata PASCH. — The typical cells were present in small quantity in forest soil only. DIATOMOPHYCEAE Cymbella ventricosa KÜTZ. (Fig. 3). — It was observed in disorganizational stage (Table 2) and occurred in forest soil only, thus this species was carried down by the translocation of forest soil and was destroyed during transfer or by culture conditions. Hantzschia amphyoxis (EHR.) GRUN. — It was present in small quantity in the samples of forest soil and existed in vegetative stage in a lower section of the cave.