Investigating the effect of silicate- and calcium-based ocean alkalinity enhancement on diatom silicification

Abstract ° C. Ocean alkalinity enhancement (OAE) is an emerging marine CDR method with the addition of pulverised minerals to the surface ocean being one widely considered approach. A concern of this approach is the potential for dissolution products released from minerals to impact phytoplankton communities. We conducted an experiment with 10 pelagic mesocosms (M1–M10) in Raunefjorden, Bergen, Norway, to assess the implications of simulated silicate- and calcium-based mineral OAE on a coastal plankton community. Five mesocosms (M1, M3, M5, M7, and M9) were enriched with silicate (∼ µ mol L- 1 Na 2 SiO 3 ∼ µ mol kg- 1 µ mol kg- 1 above natural levels. In summary, our findings illustrate that the enhancement of alkalinity via simulated silicate- and calcium-based methods has limited genus-specific impacts on the silicification of diatoms. This research underscores the importance of understanding the full breadth of different OAE approaches, their risks, co-benefits, and potential for interactive effects.

Angaben zum Objekt

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch

Verweise und Beziehungen

• Erschienen in: Investigating the effect of silicate- and calcium-based ocean alkalinity enhancement on diatom silicification ; volume:21 ; number:11 ; year:2024 ; pages:2777-2794 ; extent:18 ; Biogeosciences ; 21, Heft 11 (2024), 2777-2794 (gesamt 18)

Beteiligte, Orts- und Zeitangaben

• Urheber: Ferderer, Aaron ; Schulz, Kai ; Riebesell, Ulf ; Baker, Kirralee G. ; Chase, Zanna ; Bach, Lennart Thomas

Weitere Informationen

• DOI: 10.5194/bg-21-2777-2024
• URN: urn:nbn:de:101:1-2408051356450.354420871228
• Rechteinformation: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Letzte Aktualisierung: 14.08.2025, 10:54 MESZ