Investigating biological impacts of Ocean Alkalinity Enhancement using controlled mesocosm experiments

Ocean alkalinity enhancement (OAE) is rapidly emerging as a potential technique to mitigate against the worst impacts of climate change. However, little is known regarding the potential biological and ecological impacts of introducing alkaline base into the coastal ocean to capture CO2, reversing ocean acidification in the process. Specifically, it remains unclear whether the phytoplankton community are impacted by chemical changes induced by OAE. Recently, the National Research Council (NRC) in collaboration with Dalhousie University (Dr. MacIntyre) was funded externally to conduct a series of controlled experiments whereby natural phytoplankton communities are subjected to differing biological, chemical and physical conditions. This Dalhousie/NRC research team proposes to partner with Planetary Technologies to conduct a series of experiments at the NRC facility in Ketch Harbour whereby natural phytoplankton assemblages are subjected to increased alkalinity and closely monitored in state-of-the-art mesocosm tanks (~1000L). The Mitacs interns funded here will 1) assist in experimental design; 2) monitor changes in the seawater carbonate chemistry after alkalization; and 3) lead chemical data analysis and assist with interpretations alongside the larger project team.

Faculty Supervisor:

Hugh MacIntyre

Student:

Partner:

Planetary Technologies Inc.

Discipline:

Earth science

Sector:

Professional, scientific and technical services

University:

Dalhousie University

Program: