parameters simultaneously. We use a BD Accuri C6® flow cytometer to determine the cell density of phytoplankton and bacteria cultures as well as to measure cellular properties such as lipid and protein content [...] CASY cell counter (Photo: Julia Haafke) Gas chromatography (fatty acid analysis) To measure phytoplankton and zooplankton fatty acid content, sample solutions are injected into a gas chromatographer (GC [...] analysis of carbon and nitrogen from solid sample material. (CN) Carbon and nitrogen content of phytoplankton and zooplankton are obtained with a CHNS-analyzer. Samples go through a high-temperature combustion

community of microalgae in the Southern Ocean. In comparison to the fecal pellets of krill, Antarctic phytoplankton can more easily take up the micronutrient iron from those produced by salps. Observations made

but also to reliably demonstrate the appearance of species entirely new in the Helgoland Roads phytoplankton community. More complex analyses have also shown long-term shifts in diversity and delays in the

l (sea surface) information carried by the sea-ice proxy IP 25 and open-water phytoplankton biomarkers in a phytoplankton-IP 25 index, the so-called “PIP 25 Index“ (Fig. 1). The advantage of this approach

11'N 7 54'E), is one of the richest temporal marine datasets available. The data set comprises a phytoplankton time series (started in 1962 and sampled daily) and a zooplankton time series (started in 1975 [...] sporadically sampled depending on tide and weather conditions. The measured parameters comprise phytoplankton, zooplankton, water temperature, salinity, pH, Chlorophyll a and nutrient (N, P, Si) analyses

products (PP), diffuse attenuation (Kd) and Chlorophyll-a concentration (Chla) of the two major phytoplankton groups (PFTs) cyanobacteria and diatoms, from a user point of view and to demonstrate its quality [...] N., Mouw C. B., Organelli E., Raitsos D. E., Uitz J., Vogt M., Wolanin A. (2017a) Obtaining Phytoplankton Diversity from Ocean Color: A Scientific Roadmap for Future Development. Frontiers in Marine Science [...] T., Mangin A., Strass V. H., von Appen W.-J., Wiegmann S. (2020) High resolution water column phytoplankton composition across the Atlantic Ocean from ship- towed vertical undulating radiometry. Frontiers

quality and quantity. Compared to krill, salps prefer warmer ice-free waters and thrive at lower phytoplankton concentrations due to their filtration mode of feeding. Krill and salps are the most important [...] chemical form of dissolved Fe, the nature of organic matter, Fe bioavailability and their effects on phytoplankton community structure and productivity will be studied in a series of incubation experiments with

since 2020 there are operational global and regional CMEMS PFT CHL products, covering the whole phytoplankton community, TROPOMI PFT products are gap filling because of lower uncertainties, even in coastal [...] fill the gaps for assessing the spectral underwater radiation and four dimensional tracking of phytoplankton groups in the global ocean. Project duration : July 2019 to June 2022. Funding : ESRIN/ESA within [...] Demaria J., Soppa M.A., d’Andon O.H.F., Bracher A. (2021) Global chlorophyll a concentrations of phytoplankton functional types with detailed uncertainty assessment using multi-sensor ocean color and sea surface

with particular relevance for marine ecosystems. Among them, a large group of organisms, the phytoplankton is able to convert atmospheric CO 2 via photosynthesis into biomass. This process is called primary

9:50 New technology: beyond the challenges for a better use of phytoplankton data. Veronique Creach 10:10 High temporal resolution phytoplankton time series reveals bloom dynamics in the Gulf of Mexico Lisa [...] Monitoring phytoplankton and Harmful algal blooms through the application of innovative semi-automated tools (scanning flow cytometry & spectral fluorometry) Symposium: High throughput methods for application [...] tion using imaging and acoustics 11:20 Automated in vivo approaches for currently monitoring phytoplankton in coastal marine waters: advantages and challenges Felipe Artigas 11:40 Automated laboratory