Winners and losers under hydroxide-based ocean alkalinity enhancement in a Tasmanian plankton community.

ABSTRACT: Ocean alkalinity enhancement (OAE) is an emerging carbon dioxide CO₂ removal approach for climate change mitigation and can be implemented with various alkaline materials that convert dissolved CO₂ into (bi)carbonates, enabling additional atmospheric CO₂ removal. A key knowledge gap is how alkaline materials affect marine life. This study investigated effects of OAE via sodium hydroxide (NaOH) on a coastal Tasmanian plankton community. Natural communities were enclosed within microcosms assigned to three groups: a control, an unequilibrated treatment (NaOH addition), and an equilibrated treatment (NaOH and sodium bicarbonate (NaHCO₃) addition). The unequilibrated treatment simulates carbonate chemistry changes before atmospheric CO₂ up

SUBMITTER: Kousoulas K 

PROVIDER: S-EPMC12351364 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature