Posted: January 29th, 2023

The potential of seaweed farming as a sustainable source of biomass for biofuels and other applications in the maritime sector

The potential of seaweed farming as a sustainable source of biomass for biofuels and other applications in the maritime sector.

Seaweed farming is the most rapidly expanding aquaculture sector in the world, with significant economic, environmental and social benefits. Seaweed is widely used in food, cosmetic, pharmaceutical and agriculture industries, and has potential as a biofuel and a renewable source of plastics. Seaweed farming also increases and restores biodiversity by providing habitats for marine creatures, and can help to mitigate climate change by absorbing carbon emissions and reducing methane emissions from livestock.

However, the seaweed industry faces several challenges, such as the impacts of climate change, pests and diseases, over-reliance on certain species, and lack of biosecurity protocols. To ensure the long-term sustainability and resilience of the industry, an international team of seaweed scientists has issued eight recommendations, which include diversifying seaweed species, developing disease-resistant strains, implementing best management practices, enhancing monitoring and surveillance systems, promoting seaweed certification schemes, supporting small-scale farmers and processors, fostering international collaboration and knowledge exchange, and increasing public awareness and education about the benefits of seaweed.

Seaweed farming has huge potential to contribute to the UN Sustainable Development Goals (SDGs) and the UN Decade of Ocean Science for Sustainable Development (2021 – 2030). Seaweed can play a key role in fighting climate change by sequestering up to 2.6 billion tonnes of carbon dioxide equivalent from the atmosphere a year, more than any other natural solution. Seaweed can also reduce the demand for terrestrial crops and prevent biodiversity loss by providing an alternative source of protein, fibre, minerals and vitamins. Moreover, seaweed can create new opportunities for economic development and social empowerment in coastal communities, especially for women and youth.

Seaweed farming is not just for nori rolls; it is a promising industry that can offer multiple solutions for the future of the planet and its people.

: Elizabeth Cottier-Cook et al., ‘Eight ways to ensure a sustainable seaweed farming sector’, The Fish Site, 10 November 2021 accessed 29 November 2023.

: Mélissa Godin, ‘The Ocean Farmers Trying to Save the World With Seaweed’, Time, 4 September 2020 accessed 29 November 2023.

: Australian Geographic Staff Writer, ‘Not just for nori rolls: seaweed’s huge potential examined’, Australian Geographic, 27 January 2023 accessed 29 November 2023.

: European Commission Joint Research Centre et al., ‘Global Seaweed New and Emerging Markets – Report 2023’, Knowledge4Policy, 17 August 2023 accessed 29 November 2023.