Phytoplankton groups as indicators of eutrophication in the Boka Kotorska bay [Adriatic sea, Montenegro (Yugoslavia)]
2001
Vuksanovic, N. (Institut za biologiju mora, Kotor (Yugoslavia))
During complex studies of phytoplankton, the role of particular phytoplankton groups was examined, as one of important indicators of eutrophic processes in the Bay of Boka Kotorska (Adriatic sea, Montenegro (Yugoslavia)). Throughout summer 1999, investigations have been performed at representative locations (Kotor, Tivat and Hercegnovi bays) at the depths of 0, 5, 10 and 20 m. Maximal values of microphytoplankton were found in Kotor Bay in July (2.1 x 10**6 cells/cubic dm). In Tivat Bay, maximal values of microphytoplankton were found in June, although they were ten times lower (2.4 x 10**5 cells/cubic dm). In the Bay of Hercegnovi, mean values were lower, while maximal quantity of microphytoplankton was found in August (2.6 x 10**3 cells/cubic dm). In the Boka Kotorska Bay, the maximal percentage of 95% of the group Bacillariophyceae was found in the most productive surface layers at the depths of 0 and 5 m. The impact of eutrophication was the most visible in the Kotor Bay. It decreased towards the open sea. Diatoms populations (Bacillariophyceae) were dominant in the Bay, while the participations of other groups is insignificant. Consequently, it means that Bacillariophyceae are the most adapted group to the eutrophic conditions of the Boka Kotorska Bay.
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