engleski

Epiphytic diatoms on sawgrass (Cladium mariscus) in the karstic Plitvice Lakes, Croatia

The aquatic macrophyte vegetation of sawgrass (Cladium mariscus POHL.) was found to be suitable substrate for colonisation of epiphytic diatoms in Plitvice Lakes (Croatia). Taxonomic composition, frequency of appear ance, abundance, floral similarity and saprobity index of diatoms on live and dead stalks of Cladium mariscus, were determined. Total number of species 137, have been determined in the epiphytic community. 96 species were found on live, 111 on dead stalks, while 51% of total number were common species. The dominant community was Cymbella-Achnanthes-Gomphonema-Fragilaria-Navicula. High coefficient of floral similarity between live and dead stalks was calculated. The low index of saprobity indirectly indicated low content of dissolved organic matter and stability of the ecosystem.

Epiphytic diatoms; Cell size; Karstic waters; Saprobity; Plitvice lakes; Croatia.

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