Seawater carbonate chemistry and phytoplankton biomass and species composition of a unique temperate rocky coastal hydrothermal vent system ...

• Main Authors: Zitoun, Rebecca, Connell, Sean D, Cornwall, Christopher Edward, Currie, Kim I, Fabricius, Katharina Elisabeth, Hoffmann, L J, Lamare, Miles D, Murdoch, J, Noonan, Sam, Sander, Sylvia G, Sewell, M A, Shears, N T, van den Berg, Constant M G, Smith, Abigail M
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: CO2 vent; Coast and continental shelf; Community composition and diversity; Entire community; Field observation; Pelagos; South Pacific; Temperate; Type; Station label; Cell density; Number of species; Shannon Diversity Index; Equitability; Temperature, water; Salinity; Ammonium; Ammonium, standard deviation; Nitrogen oxide; Nitrogen oxide, standard deviation; Phosphate; Phosphate, standard deviation; pH; Carbon, inorganic, dissolved; Alkalinity, total; Partial pressure of carbon dioxide water at sea surface temperature wet air; Carbonate ion; Aragonite saturation state; Calcite saturation state; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Field measurement; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification; White Island
• Online Access: https://dx.doi.org/10.1594/pangaea.917470; https://doi.pangaea.de/10.1594/PANGAEA.917470

In situ effects of ocean acidification are increasingly studied at submarine CO2 vents. Here we present a preliminary investigation into the water chemistry and biology of cool temperate CO2 vents near Whakaari–White Island, New Zealand. Water samples were collected inside three vent shafts, within vents at a distance of 2 m from the shaft and at control sites. Vent samples contained both seawater pH on the total scale (pHT) and carbonate saturation states that were severely reduced, creating conditions as predicted for beyond the year 2100. Vent samples showed lower salinities, higher temperatures and greater nutrient concentrations. Sulfide levels were elevated and mercury levels were at concentrations considered toxic at all vent and control sites, but stable organic and inorganic ligands were present, as deduced from Cu speciation data, potentially mediating harmful effects on local organisms. The biological investigations focused on phytoplankton, zooplankton and macroalgae. Interestingly, we found ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2019) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2020-05-6. ...