Seawater carbonate chemistry and response of seasonal marine microbial communities (phytoplankton, bacteria) and viruses from the Santa Barbara Channel to OAE

Here, we used outdoor microcosm exper- iments to investigate the effec t s of abrupt limestone-inspired and NaOH alkalinity additions of ∼750 μmol/kg, reflecting model-predicted ocean alkalinity enhancement (OAE) scenarios that produce severe localized impacts (e.g. large variations in pH and Omega). We assess the response of seasonal marine microbial communities (phytoplankton, bacteria) and viruses from the Santa Barbara Channel, analyzed by high-throughput amplicon sequencing and flow cytometry.