Articles | Volume 21, issue 3
https://doi.org/10.5194/bg-21-761-2024
https://doi.org/10.5194/bg-21-761-2024
Research article
 | 
12 Feb 2024
Research article |  | 12 Feb 2024

Phytoplankton response to increased nickel in the context of ocean alkalinity enhancement

Xiaoke Xin, Giulia Faucher, and Ulf Riebesell

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Short summary
Ocean alkalinity enhancement (OAE) is a promising approach to remove CO2 by accelerating natural rock weathering. However, some of the alkaline substances contain trace metals which could be toxic to marine life. By exposing three representative phytoplankton species to Ni released from alkaline materials, we observed varying responses of phytoplankton to nickel concentrations, suggesting caution should be taken and toxic thresholds should be avoided in OAE with Ni-rich materials.
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