Seawater carbonate chemistry and mesozooplankton abundances of KOSMOS 2014 mesocosm study ...

• Main Authors: Algueró-Muñiz, Maria, Horn, Henriette G, Alvarez-Fernandez, Santiago, Spisla, Carsten, Aberle, Nicole, Bach, Lennart Thomas, Guan, WanChun, Achterberg, Eric Pieter, Riebesell, Ulf, Boersma, Maarten
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Coast and continental shelf; Community composition and diversity; Entire community; Field experiment; Macro-nutrients; Mesocosm or benthocosm; North Atlantic; Pelagos; Temperate; Event label; Type; DATE/TIME; Day of experiment; Treatment; Depth, top/min; DEPTH, water; Mesozooplankton; Fish larvae; Carbon, inorganic, dissolved; Alkalinity, total; Salinity; Temperature, water; pH; Partial pressure of carbon dioxide water at sea surface temperature wet air; Calcite saturation state; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Carbonate ion; Aragonite saturation state; Mesocosm experiment; Calculated using seacarb after Nisumaa et al. 2010; KOSMOS_2014; Ocean Acidification International Coordination Centre OA-ICC; Ocean acidification; Copepods
• Online Access: https://dx.doi.org/10.1594/pangaea.931217; https://doi.pangaea.de/10.1594/PANGAEA.931217

Ocean acidification (OA) is affecting marine ecosystems through changes in carbonate chemistry that may influence consumers of phytoplankton, often via trophic pathways. Using a mesocosm approach, we investigated OA effects on a subtropical zooplankton community during oligotrophic, bloom, and post-bloom phases under a range of different pCO2 levels (from 400 to 1480 μatm). Furthermore, we simulated an upwelling event by adding 650 m-depth nutrient-rich water to the mesocosms, which initiated a phytoplankton bloom. No effects of pCO2 on the zooplankton community were visible in the oligotrophic conditions before the bloom. The zooplankton community responded to phytoplankton bloom by increased abundances in all treatments, although the response was delayed under high-pCO2 conditions. Microzooplankton was dominated by small dinoflagellates and aloricate ciliates, which were more abundant under medium- to high-pCO2 conditions. The most abundant mesozooplankters were calanoid copepods, which did not respond to ... : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2021) 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 2021-04-30. ...