Variable responses to ocean acidification among mixotrophic protists with different lifestyles.

ABSTRACT: Marine phytoplankton are facing increasing dissolved CO₂ concentrations and ocean acidification caused by anthropogenic CO₂ emissions. Mixotrophic organisms are capable of both photosynthesis and phagotrophy of prey and are found across almost all phytoplankton taxa and diverse environments. Yet, we know very little about how mixotrophs respond to ocean acidification. Therefore, we studied responses to simulated ocean acidification in three strains of the mixotrophic chrysophyte Ochromonas (CCMP1391, CCMP2951, and CCMP1393). After acclimatization of the strains to treatment with high-CO₂ (1000 ppm, pH 7.9) and low-CO₂ concentrations (350 ppm, pH 8.3), strains CCMP1393 and CCMP2951 both exhibited higher growth rates in response to the high-

SUBMITTER: Slomka S 

PROVIDER: S-EPMC12086424 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature