The distribution of the potentially harmful dinoflagellate species Polykrikos hartmannii W.M.Zimmermann 1930 in the İzmir Bay
DOI:
https://doi.org/10.5281/zenodo.18031876Keywords:
Harmful algae, plankton, dinoflagellate, Aegean Sea, Izmir BayAbstract
This study investigated the status of Polykrikos hartmannii, a dinoflagellate species with the ability to cause excessive blooms, in the İzmir Bay between 2022 and 2025. Previously reported in the Black Sea and the Sea of Marmara, the species began to be seen in the İzmir Bay in 2022. It began to bloom in the spring of 2023, and between September and November of the same year, it proliferated to the point of covering the entire bay in a brown-red color, attracting the attention of local authorities and scientists. The species, which has also been encountered in monitoring studies conducted in the bay for the last three years, exhibited excessive blooms, particularly in November 2023, and was detected at concentrations of 12.58 × 106 cells L⁻¹ at station 8 and 8.86 × 106 cells L⁻¹ at station 9. It is thought that the species, which reproduced so excessively that it covered the entire İzmir bay between 2023 and 2024, was most likely transported to the bay via ballast tanks.
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