Seawater carbonate chemistry and coccolithophore abundances and CaCO3 concentrations during the 2013 MedSeA mesocosm experiment
Seawater carbonate chemistry and coccolithophore abundances and CaCO3 concentrations during the 2013 MedSeA mesocosm experiment
Mesocosm experiments have been fundamental to investigate the effects of elevated CO2 and ocean acidification (OA) on planktic communities. However, few of these experiments have been conducted using naturally nutrient-limited waters and/or considering the combined effects of OA and ocean warming (OW). Coccolithophores are a group of calcifying phytoplankton that can reach high abundances in the Mediterranean Sea, and whose responses to OA are modulated by temperature and nutrients. We present the results of the first land-based mesocosm experiment testing the effects of combined OA and OW on an oligotrophic Eastern Mediterranean coccolithophore community. Coccolithophore cell abundance drastically decreased under OW and combined OA and OW (greenhouse, GH) conditions. Emiliania huxleyi calcite mass decreased consistently only in the GH treatment; moreover, anomalous calcifications (i.e. coccolith malformations) were particularly common in the perturbed treatments, especially under OA. Overall, these data suggest that the projected increase in sea surface temperatures, including marine heatwaves, will cause rapid changes in Eastern Mediterranean coccolithophore communities, and that these effects will be exacerbated by OA.
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 2021-05-11.
Day of experiment, Ocean Acidification International Coordination Centre (OA-ICC), Temperate, Salinity, 1984, Community composition and diversity, Nitrite, Seawater analysis Strickland Parsons, inorganic, Alkalinity, Coccospheres, malformed, Counted, Seawater analysis (Strickland & Parsons, 1972), Cell density, Nitrate, Temperature, water, Carbon, inorganic, dissolved, Calculated using seacarb after Nisumaa et al 2010, Calculated, Pendant Temperature/Light Data Logger 64K, HOBO, Mesocosm or benthocosm, Aragonite saturation state, Alkalinity, total, total, pH, 2005, Pelagos, Mesocosm experiment, Temperature, dissolved, Silicate, Laboratory experiment, Carbonate ion, Conductivity sensor, Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), Spectrophotometry, Seawater analysis (Strickland & Parsons, 1972), Earth System Research, malformed, Spectrophotometry, MAGIC25 procedure (Rimmelin & Moutin, 2005), Calcium carbonate, Calcification/Dissolution, Potentiometric titration, Calcite saturation state, Spectrophotometry, MAGIC25 procedure (Rimmelin & Moutin, 2005), Coccospheres, Potentiometric, water, Conductivity sensor, Aanderaa, type 3919, Phosphate, Growth Morphology, Seawater analysis Ivancic Deggobis, MAGIC25 procedure Rimmelin Moutin, Ammonia, DATE TIME, Ocean Acidification International Coordination Centre OA ICC, Mediterranean Sea, type 3919, Type, Bicarbonate ion, particulate, Calculated using seacarb after Nisumaa et al. (2010), 1972, Carbonate system computation flag, Calcium carbonate, particulate, Seawater analysis (Ivancic & Deggobis, 1984), Mass, Measured and or detected by SYRACO software, pH, total scale, Fugacity of carbon dioxide (water) at sea surface temperature (wet air), Carbon, HOBO, Treatment, Partial pressure of carbon dioxide water at sea surface temperature wet air, DATE/TIME, Aanderaa, Carbon dioxide, Seawater analysis (Ivancic & Deggobis, 1984), Entire community, Growth/Morphology, Calcification Dissolution, Pendant Temperature Light Data Logger 64K, Fugacity of carbon dioxide water at sea surface temperature wet air, Coast and continental shelf, Measured and/or detected by SYRACO software
Day of experiment, Ocean Acidification International Coordination Centre (OA-ICC), Temperate, Salinity, 1984, Community composition and diversity, Nitrite, Seawater analysis Strickland Parsons, inorganic, Alkalinity, Coccospheres, malformed, Counted, Seawater analysis (Strickland & Parsons, 1972), Cell density, Nitrate, Temperature, water, Carbon, inorganic, dissolved, Calculated using seacarb after Nisumaa et al 2010, Calculated, Pendant Temperature/Light Data Logger 64K, HOBO, Mesocosm or benthocosm, Aragonite saturation state, Alkalinity, total, total, pH, 2005, Pelagos, Mesocosm experiment, Temperature, dissolved, Silicate, Laboratory experiment, Carbonate ion, Conductivity sensor, Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), Spectrophotometry, Seawater analysis (Strickland & Parsons, 1972), Earth System Research, malformed, Spectrophotometry, MAGIC25 procedure (Rimmelin & Moutin, 2005), Calcium carbonate, Calcification/Dissolution, Potentiometric titration, Calcite saturation state, Spectrophotometry, MAGIC25 procedure (Rimmelin & Moutin, 2005), Coccospheres, Potentiometric, water, Conductivity sensor, Aanderaa, type 3919, Phosphate, Growth Morphology, Seawater analysis Ivancic Deggobis, MAGIC25 procedure Rimmelin Moutin, Ammonia, DATE TIME, Ocean Acidification International Coordination Centre OA ICC, Mediterranean Sea, type 3919, Type, Bicarbonate ion, particulate, Calculated using seacarb after Nisumaa et al. (2010), 1972, Carbonate system computation flag, Calcium carbonate, particulate, Seawater analysis (Ivancic & Deggobis, 1984), Mass, Measured and or detected by SYRACO software, pH, total scale, Fugacity of carbon dioxide (water) at sea surface temperature (wet air), Carbon, HOBO, Treatment, Partial pressure of carbon dioxide water at sea surface temperature wet air, DATE/TIME, Aanderaa, Carbon dioxide, Seawater analysis (Ivancic & Deggobis, 1984), Entire community, Growth/Morphology, Calcification Dissolution, Pendant Temperature Light Data Logger 64K, Fugacity of carbon dioxide water at sea surface temperature wet air, Coast and continental shelf, Measured and/or detected by SYRACO software
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