Changes in the mosaic-like water surfaces of the Lake Velence as reflected by reed periphyton studies

Ács, Éva and Buczkó, Krisztina and Lakatos, Gy. (1994) Changes in the mosaic-like water surfaces of the Lake Velence as reflected by reed periphyton studies. Studia Botanica Hungarica, 25. pp. 5-19. ISSN 0301-7001

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Abstract

Long term changes of the reed cover of the Lake Velence (12 years) were summarised for this paper, with emphasis on the results of investigations in 1989 and 1990. Ont he basis of the analyses it appeared that the water surface of the lake had lost its former mosaic-like character, which was primarily caused by intensive reed harvesting. Due to the scarcity of water since 1989, the salinity of the lake was increasing, as indicated by the increasing relative abundance of Chaetoceros muelleri as well as other factors. Scarcity of water also explains that algal fields detached from the basement are getting wide-spread even in protected areas (still preserving the water quality characteristic of the dark brown water surfaces), especially species of filamentours blue algae.

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