Differing responses of three Southern Ocean Emiliania huxleyi ecotypes to changing seawater carbonate chemistry
Differing responses of three Southern Ocean Emiliania huxleyi ecotypes to changing seawater carbonate chemistry
The invasion of anthropogenic carbon dioxide into the surface ocean is altering seawater carbonate speciation, a process commonly called ocean acidification. The high latitude waters of the Southern Ocean are one of the primary and most severely affected regions. Coccolithophores are an important phytoplankton group, responsible for the majority of pelagic calcium carbonate production in the world's oceans, with a distribution that ranges from tropical to polar waters. Emiliania huxleyi is numerically the most abundant coccolithophore species and appears in several different ecotypes. We tested the effects of ocean acidification on 3 carefully selected E. huxleyi ecotypes isolated from the Southern Ocean. Their responses were measured in terms of growth, photosynthesis, calcification, cellular geometry, and stoichiometry. The 3 ecotypes exhibited differing sensitivities in regards to seawater carbonate chemistry when cultured at the same temperature (14°C) and continuous light (110 µmol photons/m2/s). Under future ocean acidification scenarios, particulate inorganic to organic carbon ratios (PIC:POC) decreased by 38-44, 47-51 and 71-98% in morphotype A 'over-calcified' (A o/c), A and B/C, respectively. All ecotypes reduced their rate of calcification, but the cold-water adapted ecotype (morphotype B/C) was by far the most sensitive, and almost ceased calcification at partial pressure of carbon dioxide ( pCO2) levels above 1000 µatm. We recommend that future surveys for E. huxleyi cells in the Southern Ocean should include the capability of recognising 'naked cells' by molecular and microscopic tools. The distinct differences in the physiological responses of these 3 dominant Southern Ocean coccolithophore ecotypes are likely to have consequences for future coccolithophore community structures and thereby the Southern Ocean carbon cycle.
In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2015) 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 is 2016-06-15.
Supplement to: Müller, Marius N; Trull, Tom W; Hallegraeff, Gustaaf M (2015): Differing responses of three Southern Ocean Emiliania huxleyi ecotypes to changing seawater carbonate chemistry. Marine Ecology Progress Series, 531, 81-90
Ocean Acidification International Coordination Centre (OA-ICC), Bicarbonate ion, standard deviation, Alkalinity, total, standard deviation, production per cell, total scale, Growth rate, standard deviation, Particulate organic carbon, Carbon, inorganic, dissolved, Temperature, water, Particulate organic nitrogen production, Calculated using seacarb after Nisumaa et al 2010, diameter, Particulate inorganic carbon/particulate organic carbon ratio, standard deviation, pH, Laboratory experiment, Carbonate ion, particulate ratio, standard deviation, Uniform resource locator link to reference, Particulate organic nitrogen production, standard deviation, Calcification/Dissolution, Coccoliths, Calcite saturation state, Nitrogen, water, Carbon, inorganic, particulate, per cell, Nitrogen, organic, particulate, per cell, Partial pressure of carbon dioxide, Growth Morphology, per cell, Emiliania huxleyi, Production of particulate organic carbon per cell, Carbon, organic, particulate/Nitrogen, organic, particulate ratio, standard deviation, Carbon, organic, particulate, per cell, Carbon, organic, particulate/Nitrogen, organic, particulate ratio, Carbon, inorganic, dissolved, standard deviation, Calcite saturation state, standard deviation, Type, Cell, diameter, standard deviation, Calculated using seacarb after Nisumaa et al. (2010), Particulate organic carbon production per cell, Particulate inorganic carbon, Particulate inorganic carbon per cell, Primary production Photosynthesis, Species, Bottles or small containers/Aquaria (<20 L), Carbonate system computation flag, pH, standard deviation, Carbonate ion, standard deviation, pH, total scale, Fugacity of carbon dioxide (water) at sea surface temperature (wet air), Carbon, Biomass/Abundance/Elemental composition, Partial pressure of carbon dioxide water at sea surface temperature wet air, Not applicable, Single species, Calcification Dissolution, Fugacity of carbon dioxide water at sea surface temperature wet air, Cell, production, Biomass Abundance Elemental composition, Registration number of species, Salinity, Particulate organic carbon content per cell, Bottles or small containers/Aquaria (<20 L), inorganic, Alkalinity, Cell biovolume, standard deviation, Strain, Particulate organic nitrogen per cell, standard deviation, Aragonite saturation state, Bottles or small containers Aquaria 20 L, Particulate organic carbon, production, standard deviation, Alkalinity, total, total, Chromista, Particulate inorganic carbon particulate organic carbon ratio, Pelagos, Temperature, Carbon, inorganic, particulate, production per cell, Haptophyta, dissolved, Particulate organic carbon content per cell, standard deviation, Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), Particulate inorganic carbon per cell, standard deviation, Carbon dioxide, standard deviation, Earth System Research, Particulate inorganic carbon production per cell, Particulate organic nitrogen per cell, Production of particulate organic nitrogen, Potentiometric titration, organic, Carbon, organic, particulate, production per cell, Coccoliths, diameter, standard deviation, Particulate inorganic carbon, production, standard deviation, Particulate inorganic carbon/particulate organic carbon ratio, Coccoliths, diameter, Cell, diameter, Uniform resource locator/link to reference, Ocean Acidification International Coordination Centre OA ICC, Bicarbonate ion, particulate, volume, Laboratory strains, Growth rate, Calculated using CO2SYS, Partial pressure of carbon dioxide, standard deviation, Coccoliths, volume, standard deviation, Primary production/Photosynthesis, Coccoliths, volume, Carbon dioxide, Growth/Morphology, Phytoplankton, Cell biovolume, particulate Nitrogen
Ocean Acidification International Coordination Centre (OA-ICC), Bicarbonate ion, standard deviation, Alkalinity, total, standard deviation, production per cell, total scale, Growth rate, standard deviation, Particulate organic carbon, Carbon, inorganic, dissolved, Temperature, water, Particulate organic nitrogen production, Calculated using seacarb after Nisumaa et al 2010, diameter, Particulate inorganic carbon/particulate organic carbon ratio, standard deviation, pH, Laboratory experiment, Carbonate ion, particulate ratio, standard deviation, Uniform resource locator link to reference, Particulate organic nitrogen production, standard deviation, Calcification/Dissolution, Coccoliths, Calcite saturation state, Nitrogen, water, Carbon, inorganic, particulate, per cell, Nitrogen, organic, particulate, per cell, Partial pressure of carbon dioxide, Growth Morphology, per cell, Emiliania huxleyi, Production of particulate organic carbon per cell, Carbon, organic, particulate/Nitrogen, organic, particulate ratio, standard deviation, Carbon, organic, particulate, per cell, Carbon, organic, particulate/Nitrogen, organic, particulate ratio, Carbon, inorganic, dissolved, standard deviation, Calcite saturation state, standard deviation, Type, Cell, diameter, standard deviation, Calculated using seacarb after Nisumaa et al. (2010), Particulate organic carbon production per cell, Particulate inorganic carbon, Particulate inorganic carbon per cell, Primary production Photosynthesis, Species, Bottles or small containers/Aquaria (<20 L), Carbonate system computation flag, pH, standard deviation, Carbonate ion, standard deviation, pH, total scale, Fugacity of carbon dioxide (water) at sea surface temperature (wet air), Carbon, Biomass/Abundance/Elemental composition, Partial pressure of carbon dioxide water at sea surface temperature wet air, Not applicable, Single species, Calcification Dissolution, Fugacity of carbon dioxide water at sea surface temperature wet air, Cell, production, Biomass Abundance Elemental composition, Registration number of species, Salinity, Particulate organic carbon content per cell, Bottles or small containers/Aquaria (<20 L), inorganic, Alkalinity, Cell biovolume, standard deviation, Strain, Particulate organic nitrogen per cell, standard deviation, Aragonite saturation state, Bottles or small containers Aquaria 20 L, Particulate organic carbon, production, standard deviation, Alkalinity, total, total, Chromista, Particulate inorganic carbon particulate organic carbon ratio, Pelagos, Temperature, Carbon, inorganic, particulate, production per cell, Haptophyta, dissolved, Particulate organic carbon content per cell, standard deviation, Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), Particulate inorganic carbon per cell, standard deviation, Carbon dioxide, standard deviation, Earth System Research, Particulate inorganic carbon production per cell, Particulate organic nitrogen per cell, Production of particulate organic nitrogen, Potentiometric titration, organic, Carbon, organic, particulate, production per cell, Coccoliths, diameter, standard deviation, Particulate inorganic carbon, production, standard deviation, Particulate inorganic carbon/particulate organic carbon ratio, Coccoliths, diameter, Cell, diameter, Uniform resource locator/link to reference, Ocean Acidification International Coordination Centre OA ICC, Bicarbonate ion, particulate, volume, Laboratory strains, Growth rate, Calculated using CO2SYS, Partial pressure of carbon dioxide, standard deviation, Coccoliths, volume, standard deviation, Primary production/Photosynthesis, Coccoliths, volume, Carbon dioxide, Growth/Morphology, Phytoplankton, Cell biovolume, particulate Nitrogen
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).0 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Average influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Average
Citations provided by BIP!Popularity provided by BIP!