RESEARCH Molecular (PCR-DGGE) ver o

Full list of author information is available at the end of the articleand freshwater environments. The massive appearance of cyanobacteria creates a serious threat to aquatic ecosystems. In the summer period, cyanobacteria (commonly called blue-green algae) often become the dominant component of the phytoplankton community in eutrophicated lake ecosystems [1]. Their blooms, which flow, can lead to a decrease in aquatic biota diversity, in-creased turbidity and oxygen deficit of the water. Further-more, the increased concentration of toxins produced by cyanobacteria is dangerous for aquatic biota and humans, especially when present in drinking water reservoirs, or in water bodies used for recreational and fishery pur-poses [2]. Many species of cyanobacteria can produce toxins such as hepatotoxins, neurotoxins and dermatotoxins. Fresh- * Correspondence