Publication Date:
2024-03-15
Description:
Rising levels of atmospheric CO2 are responsible for a change in the carbonate chemistry of seawater with associated pH drops (acidification) projected to reach 0.4 units from 1950 to 2100. We investigated possible indirect effects of seawater acidification on the feeding, fecundity, and hatching success of the calanoid copepod Acartia grani, mediated by potential CO2-induced changes in the nutritional characteristics of their prey. We used as prey the autotrophic dinoflagellate Heterocapsa sp., cultured at three distinct pH levels (control: 8.17, medium: 7.96, and low: 7.75) by bubbling pure CO2 via a computer automated system. Acartia grani adults collected from a laboratory culture were acclimatized for 3 d at food suspensions of Heterocapsa from each pH treatment (ca. 500 cells/ml; 300 mg C/l). Feeding and egg production rates of the preconditioned females did not differ significantly among the three Heterocapsa diets. Egg hatching success, monitored once per day for the 72 h, did not reveal significant difference among treatments. These results are in agreement with the lack of difference in the cellular stoichiometry (C : N, C : P, and N : P ratios) and fatty acid concentration and composition encountered between the three tested Heterocapsa treatments. Our findings disagree with those of other studies using distinct types of prey, suggesting that this kind of indirect influence of acidification on copepods may be largely associated with interspecific differences among prey items with regard to their sensitivity to elevated CO2 levels.
Keywords:
Acartia grani; Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Arthropoda; Behaviour; Bicarbonate ion; Bicarbonate ion, standard deviation; Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Calculated using SWCO2 (Hunter, 2007); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard deviation; Carbon/Phosphorus ratio; Carbon/Phosphorus ratio, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon ingestion rate, standard deviation; Carbon ingestion rate per individual; Carbon per cell; Carbon per cell, standard deviation; Cell biovolume; Cell biovolume, standard deviation; Cell density; Cells equivalent spherical diameter; Chromista; Clearance rate; Clearance rate, standard deviation; Dry air column-averaged mixing ratio of carbon dioxide; Dry air column-averaged mixing ratio of carbon dioxide, standard deviation; Egg production rate, standard deviation; Egg production rate per female; Fatty acid content; Fatty acid content, standard deviation; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gross growth efficiency; Gross growth efficiency, standard deviation; Group; Growth/Morphology; Heterocapsa sp.; Ingestion rate, standard deviation; Ingestion rate per individual; Laboratory experiment; Laboratory strains; Myzozoa; Nitrogen/Phosphorus ratio; Nitrogen/Phosphorus ratio, standard deviation; Nitrogen ingestion rate, standard deviation; Nitrogen ingestion rate per individual; Nitrogen per cell; Nitrogen per cell, standard deviation; Not applicable; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; Percentage; Percentage, standard deviation; pH; pH, standard deviation; Phosphorus ingestion rate, standard deviation; Phosphorus ingestion rate per individual; Phosphorus per cell; Phosphorus per cell, standard deviation; Phytoplankton; Potentiometric; Potentiometric titration; Reproduction; Salinity; Single species; Species; Table; Temperature, water; Time in days; Treatment; Zooplankton
Type:
Dataset
Format:
text/tab-separated-values, 3726 data points
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