Biological data from EUROFLEETS+ PHYCOB cruise 2021 in the Black Sea

• Main Authors: Krock, Bernd, Tillmann, Urban, Möller, Kristof, Koch, Florian, Boicenco, Laura, Dzhembekova, Nina, Dursun, Fuat, Lundholm, Nina, Kremp, Anna, Vlas, Oana
• Format: Dataset
• Language: unknown
• Published: SEANOE 2023
• Subjects: plankton; phycotoxins; microalgae; species distribution; Black Sea; harmful algal blooms (HAB); salinity; chlorophyll-a; temperature; cysts; sediment; vitamin B12; Greenland
• Online Access: https://doi.org/10.17882/96335; https://www.seanoe.org/data/00851/96335/

PHYCOB - Assessment of phycotoxins and their producing species in the Black Sea. The main scientific objectives for the proposed research cruise are: 1) To assess the presence of toxic microalgae in the plankton assemblage of the Western Black Sea. 2) To quantitatively determine the spatial distribution of toxic phytoplankton species and their corresponding toxins in the plankton. 3) To quantitatively describe the spatial distribution of toxic phytoplankton resting stages in surface sediments and determine hotspots of recruitment and bloom initiation. 4) To define correlations among hydrographic and/or meteorological conditions and occurrence of HAB species. 5) To characterize the plankton communities accompanying HAB species together with toxin analysis of size fractionated samples. 6) To identify heterotrophic dinoflagellates, ciliates, or other small zooplankton as possible toxin vectors. 7) To isolate toxic Black Sea microalgal species and establish monoclonal cultures for characterization of Black Sea strains. 8) To perform an interseasonal comparison of toxigenic plankton species by combining the data sets collected during the R/V Akademik cruise that was performed in May/June 2019 with our data from summer. 9) To compare the data set from the Western Black Sea to the Southern (North-) Western North Sea, Baltic Sea and West Greenland obtained during earlier expeditions for site comparisons. The cruise started on 11th September from Istanbul and ended on 17th September back to Istanbul on board of the R/V Tübitak Marmara. Lab work after each station consisted of processing the bottle water and net tows, whereas sediment samples were only transferred into centrifugation tubes and stored for posterior resting stage analysis and germination at IOW in the fridge at 4 °C. Bottle water was taken for nutrient analysis, dissolved oxygen, pH, dissolved organic matter (DOM), particulate organic carbon (POC) and nitrogen (PON), cobalamins (vitamin B12), plankton species determination and quantification, DNA, live ...