Effects of Filamentous Cyanobacterial Allelopathy on Phytoplankton Community in Miankaleh Wetland, North of Iran

This study investigated the effects of monocultures of three dominant cyanobacterial species Nostoc spongiaeforme C. Agardh ex Bornet Flahault, Anabaena vaginicola F.E. Fritsch Rich and oscillatoria limosa C. Agardh ex Gomont on a brackish water phytoplankton community in Miankaleh international wetland and peninsula, north of Iran. We compared the chlorophyll a concentration and cell numbers after treatment. As a result, among three cyanobacterial species, N. spongiaeforme had most allelopathic effects on phytoplankton community whereas O. limosa and A. vaginicola showed no noticeable effects. The effects of N. spongiaeforme on phytoplankton community could be divided into two types: Strong negative effects and positive effects.