Articles | Volume 17, issue 16
https://doi.org/10.5194/bg-17-4153-2020
https://doi.org/10.5194/bg-17-4153-2020
Research article
 | 
18 Aug 2020
Research article |  | 18 Aug 2020

Ocean acidification reduces growth and grazing impact of Antarctic heterotrophic nanoflagellates

Stacy Deppeler, Kai G. Schulz, Alyce Hancock, Penelope Pascoe, John McKinlay, and Andrew Davidson

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Short summary
Our study showed how ocean acidification can exert both direct and indirect influences on the interactions among trophic levels within the microbial loop. Microbial grazer abundance was reduced at CO2 concentrations at and above 634 µatm, while microbial communities increased in abundance, likely due to a reduction in being grazed. Such changes in predator–prey interactions with ocean acidification could have significant effects on the food web and biogeochemistry in the Southern Ocean.
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