Black Sea Experiment BSEX

Experienced teams in several of the Black Sea regions designed a specialised study with emphasis on addressing MSFD descriptors, which demand more detailed investigations. By making use of experimental investigations or process models the BSEX team mainly aims to address 3 defined hot topics; eutrophication, invasive ctenophores, anchovy spawning areas. During the BSEX 2013 joint cruises the level of eutrophication and distribution of phytoplankton, zooplankton and impact of gelatinous zooplankton is studied and changes in the phytoplankton composition are addressed with respect to decreased concentrations of certain micronutrients (such as silica and phosphorus). Temporal levels in the concentration of invasive ctenophores and their impact on native zooplankton and especially on fish are updated. Modern spawning areas most abundant fish is investigated by sampling eggs and larvae of anchovy during the peak spawning seasons