Assessing the effects and risks of ocean alkalinity enhancement on the physiology, functionality, calcification, and mineralogy of corals and crustose coralline algae in the Pacific

PI: Melissa Meléndez, University of Hawai’i, Manoa
Start Year: 2023 | Duration: 4 years
Partners: University of Hawai’i, Manoa, Texas A&M Corpus Christi, NOAA Pacific Islands Fisheries Science Center

Project Abstract:

The main objectives of the research are to identify how corals and crustose coralline algae respond to immediate alkalinity additions and to determine the effects of chronic and acute exposure to ocean alkalinity enhancement. The study will explore whether biological limitations are primarily attributed to alkalinity or other factors like potential trace metal toxicity from the minerals used in ocean alkalinity enhancement. Laboratory experiments using different alkalinity enhancement agents (quicklime, sodium hydroxide, and olivine) conducted in chambers and mesocosms will establish safe operating conditions and understand the mechanisms of calcification in corals and crustose coralline algae under different ocean alkalinity enhancement scenarios. The team will support inclusivity and equity in the field of marine carbon dioxide removal by offering paid internships for underrepresented groups.