Gill et al. (2025): The Physiological Response of Contrasting Coccolithophore Species to Ocean Alkalinity Enhancement
Sophie Gill, Jiayou Ge, Qiong Zhang, Gideon M. Henderson, Rosalind E. M. Rickaby, IN: Journal of Geophysical Research: Biogeosciences, https://doi.org/10.1029/2025JG009103
Environmental impacts related to the Ocean Alkalinity Enhancement (OAE) on marine biota remain underexplored. Ocean Alkalinity Enhancement aims to increase the ocean’s total alkalinity (TA), shifting the carbonate buffer system to prompt air-sea gas exchange and CO₂ drawdown. These conditions might be favorable for calcifiers, leading to increased removal of alkalinity in CaCO₃ and reversing some of the intended benefit of the OAE. Here, the authors parameterize the impact of increased ocean alkalinity on two dominant end-member coccolithophore species: Gephyrocapsa huxleyi and Coccolithus braarudii.