L. Hably szerk.: Studia Botanica Hungarica 19. 1986 (Budapest, 1986)
Buczkó, Krisztina: A comparative study of the periphytic algae on three different flower plant species in Lake Hidegségi Fertő, Hungary
STUDIA BOTANICA HUNGARICA (Antea: Fragmenta Botanica) XIX. 1986 p. 63-71 A comparative study of the periphytic algae on three different flower plant species in Lake Hidegségi Fertő, Hungary % K. BUCZKO (Received November 30, 1985) Abstract: Substrate specificity of the periphytic algae upon three aquatic flower plants were examined in Lake Hidegség! (Fertő). One hundred and five taxa were identified. It has been found that the diversity of periphyton samples of Typha angustifolia was greater than the diversity of epiphytic algal assemblages of Schoenoplectus litoralis and Phragmites communis . The floristical differences among the periphvton of Schoenoplectus and Phragmites were shown with the help of cluster analysis. With 1 table and 4 figures. INTRODUCTION Though Lake Ferto is the second largest lake of Hungary its intensive algological research began only in recent years. Concerning the algae living on macrophyta, floristical data are reported altogether only in five publications (LOVB 1955. HUSTEDT 1959a, 1959b, 1959c, PADISÁK 19821. However, studying the periphyton of Lake Ferto would be particularly interesting since the Hungarian part of the lake is covered by continuous reed up to 82% (BÁCSATYAI et at. 19831, thus it is the largest undrained swamp of Hungary. ALLEN (19711 estimated that more than 20 percent of the total lake production could be attributed to attached algae so the quantity and quality of the periphyton is not in the least negligible for the water qualification of Lake FertS. Lake Hidegségi is one of the several inner lakes to be found in the reed-belt of Fertő. The lake is mainly surrounded by Phragmites communis mixed with very few Typha angustifolia . Schoe noplectus litoralis forms separata islands on the lake. The water of the inner lakes is typically brown differing from the grey colour of the open water. PADISÁK (1982) found that the difference between the periphyton of the grey and the brown water is greater than the periphyton of different substrate plants, e.g. the difference of the periphyton of Phragmites living in grey and brown water is greater than the difference between the periphyton of Phragmites and Typha in brown water. PADISÁK studied the periphyton of only 1 substrate plant of Phragmites and Typha. Besides obtaining additional floristical data, the purposes of the present study are to examine the following 1. the dominance properties of the periohyton 2. if there is a real floristical difference between the periphyton of different substrate plants i.e., whether the periphytons of two Phra gmite s are more similar than that of a Phragmi tes and a Typha 3. if there is any difference between the diversity of the periphytons. MATERIALS AND METHODS Samples of periphyton were collected on 9 November, 1983 from stands of three different
