DefinePK

Abstract

Rising atmospheric CO₂ levels threaten global biodiversity and human well-being, driving interest in sustainable, carbon-negative solutions. Seaweeds have emerged as a key blue carbon resource due to their rapid growth and high capacity for organic carbon fixation. This paper examines various seaweed-based carbon sequestration mechanisms—photosynthesis, sedimentation, and carbon-neutral product development—and introduces models for estimating net CO₂ removal in aquaculture systems. Despite their potential, seaweed ecosystems face challenges such as ocean acidification and habitat degradation. To address these, the study advocates for large-scale seaweed mariculture, restoration, and ocean afforestation, supported by public-private initiatives and aligned with the UN Sustainable Development Goals. Seaweed cultivation is presented as a viable, nature-based solution for climate change mitigation and long-term carbon storage.