The historical algal species dynamics showed fluctuations of algal diversity in Hula Lake system with peaks due to anthropogenic influence on the aquatic ecosystems in 1995, 1998, and 2006 and at present. Bioindication show that the waters of Hula Lake system during about last century were fresh, alkaline and low to middle polluted with tendency of salinity and organic pollution. Increasing in algal species diversity correlated with anthropogenic influences impacting the aquatic ecosystems from 1995 at present as a result of anthropogenic transformation of the Hula Valley and the water management in the Hula Lake.

Keywords: algal diversity, bioindication, long-term dynamics, Hula Lake, Israel

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