Seawater carbonate chemistry and microbial dynamics in shallow CO2 seeps system off Panarea Island (Italy)

Sampling was carried out between 28th and 31st July 2011 in the Panarea Island area along a 9-station transect. One extra station located north of the vent field was sampled as a reference (i.e., no ventinfluenced). At each station, temperature, salinity, oxygen, and pH vertical profiles were registered using a CTD SBE9 Seabird. Seawater was collected with 10 L Niskin bottles for determining pH, the concentrations of chlorophyll a, macronutrients, dissolved inorganic carbon, particulate organic carbon, and nitrogen concentrations, as well as prokaryotic abundance, the rates of heterotrophic carbon production and extracellular enzymatic activities, and to depict the prokaryotic community structure by 16S rRNA gene amplicon sequencing (at seven stations).