KOSMOS Finland 2012 mesocosm study: Phytoplankton, prokaryote, virus abundances (flow cytometry) and grazing, lysis and gross growth rates of phytoplankton and prokaryotes

Ocean acidification resulting from the uptake of anthropogenic carbon dioxide (CO2) by the ocean is considered a major threat to marine ecosystems. Here we examined the effects of ocean acidification on microbial community dynamics in the eastern Baltic Sea during the summer of 2012 when inorganic nitrogen and phosphorus were strongly depleted. Large-volume in situ mesocosms were employed to mimic present, future and far future CO2 scenarios. All six groups of phytoplankton enumerated by flow cytometry (