Environmental regulation of dissolved organic carbon release by seaweeds ...

• Main Author: Paine, Elise
• Format: Text
• Language: unknown
• Published: University Of Tasmania 2024
• Subjects: Ocean acidification
• Online Access: https://dx.doi.org/10.25959/24978141; https://figshare.utas.edu.au/articles/thesis/Environmental_regulation_of_dissolved_organic_carbon_release_by_seaweeds/24978141

Dissolved organic carbon (DOC) release by seaweeds (marine macroalgae) is a critical component of the ocean’s biogeochemical carbon cycle but is a relatively unstudied aspect of seaweed carbon physiology. To address this, the aim of this PhD research project was to explore how environmental factors ‒ seasonal fluctuations in nitrogen and temperature, ocean acidification (OA) and essential micronutrient limitation (iron, dFe) ‒ would influence and drive the DOC release rates of seaweeds with varied dissolved inorganic carbon (C i , defined as CO 2 + HCO 3 - ) uptake strategies.To determine knowledge gaps in the research regarding seaweed DOC release, Chapter Two reviewed and synthesised the current scientific literature. DOC release rates from different studies were converted to a standard unit (μmol C gDW -1 h -1 ) which allowed comparisons between functional groups, phyla, and environmental influences to determine dominating factors regulating DOC release. We found that DOC release rates were increased ...