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Reduced resilience of a globally distributed coccolithophore to ocean acidification: Confirmed up to 2000 generations

By Peng Jin and Kunshan Gao

Abstract

Ocean acidification (OA), induced by rapid anthropogenic CO2 rise and its dissolution in seawater, is known to have consequences for marine organisms. However, knowledge on the evolutionary responses of phytoplankton to OA has been poorly studied. Here we examined the coccolithophore Gephyrocapsa oceanica, while growing it for 2000 generations under ambient and elevated CO2 levels. While OA stimulated growth in the earlier selection period (from generations 700 to 1550), it reduced it in the later selection period up to 2000 generations. Similarly, stimulated production of particulate organic carbon and nitrogen reduced with increasing selection period and decreased under OA up to 2000 generations. The specific adaptation of growth to OA disappeared in generations 1700 to 2000 when compared with that at 1000 generations. Both phenotypic plasticity and fitness decreased within selection time, suggesting that the species' resilience to OA decreased after 2000 generations under high CO2 selection

Topics: Alkalinity, total; Alkalinity, total, standard deviation; Aragonite saturation state; Bicarbonate, standard deviation; Bicarbonate ion; 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); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbon, organic, particulate, per cell; Carbon/Nitrogen ratio; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Chromista; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Generation; Gephyrocapsa oceanica; Growth/Morphology; Growth rate; Haptophyta; Incubation duration; Laboratory experiment; Laboratory strains; Nitrogen, organic, particulate, per cell; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Phytoplankton; Plasticity; Potentiometric; Primary production/Photosynthesis; Production of particulate organic carbon per cell; Production of particulate organic nitrogen; Registration number of species; Response, direct; Responses, correlated; Salinity; Single species; Species; Temperature, water; Treatment; Type; Uniform resource locator/link to reference
Publisher: PANGAEA
Year: 2016
DOI identifier: 10.1594/PANGAEA.860281
OAI identifier: oai:pangaea.de:doi:10.1594/PANGAEA.860281
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