Occurrence of Cyanobacteria in the Gulf of Gdańsk (2008–2009)

Justyna Kobos; Anna Krakowiak; Agata Błaszczyk; Anna Toruńska-Sitarz

doi:https://doi.org/10.34808/x55q-sz53_dyr_roz19

Occurrence of Cyanobacteria in the Gulf of Gdańsk (2008–2009)

Abstract

Blooms of cyanobacteria develop each summer in the Baltic Sea. Collecting complete data on this phenomenon is helpful in understanding the changes taking place in the Baltic Sea and forecasting the occurrence of these phenomena in the future. This dataset includes unpublished information about the occurrence of cyanobacteria in the Gulf of Gdańsk (Southern Baltic) in 2008 and 2009. The presented data combines basic physic-ochemical and biological parameters of the sampled waters, therein: water temperature, salinity, chlorophyll a, occurrence of diazotrophic cyanobacterial species from Nodularia, Aphanizomenon and Dolichospermum genera, their biomass and abundance, concentration of detected cyanotoxins. The obtained results indicate the presence of toxic cyanobacteria species in the Gulf of Gdansk. The abundance and biomass of cyanobacteria and the concentration of toxins changed during the season. The highest concentration of nodularin was recorded on 29th of July 2009 when Nodularia spumigena dominated in the phytoplankton.