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Beyond the Bloom: Invasive Seaweed Sargassum spp. as a Catalyst for Sustainable Agriculture and Blue Economy—A Multifaceted Approach to Biodegradable Films, Biostimulants, and Carbon Mitigation
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Researchers assessed microplastic contamination in the tissues of commercially important squid species harvested from fishing grounds across a regional sea, finding particles in digestive glands and mantle tissue. The study estimates consumer exposure to microplastics via squid consumption and highlights cephalopods as an overlooked pathway for human dietary microplastic intake.
The Anthropocene has ushered in unprecedented environmental challenges, with invasive seaweed blooms emerging as a critical yet understudied facet of climate change. These blooms, driven by nutrient runoff and oceanic alterations, disrupt ecosystems, threaten biodiversity, and impose economic and public health burdens on coastal communities. However, invasive seaweeds also present an opportunity as a sustainable resource. This study explores the valorization of Sargassum spp. for agricultural applications, focusing on the development of biodegradable bioplastics and biostimulants. Field trials demonstrated the effectiveness of Marine Symbiotic® Sargassum-derived biostimulant in distinct agricultural contexts. In the Dominican Republic, trials on pepper crops showed significant improvements, including a 33.26% increase in fruit weight, a 21.94% rise in fruit set percentage, a 45% higher yield under high-stress conditions, and a 48.42% reduction in fruit rejection compared to control. In Colombia, trials across four leafy green varieties revealed biomass increases of up to 360%, a 50% reduction in synthetic input dependency, and enhanced crop coloration, improving marketability. Additionally, Sargassum-based biofilms exhibited favorable mechanical properties and biodegradability, offering a sustainable alternative to conventional agricultural plastics. Carbon credit quantification revealed that valorizing Sargassum could prevent up to 89,670 tons of CO2-equivalent emissions annually using just one Littoral Collection Module® harvesting system, while biostimulant application enhanced carbon sequestration in crops. These findings underscore the potential of invasive seaweed valorization to address multiple climate challenges, from reducing plastic pollution and GHG emissions to enhancing agricultural resilience, thereby contributing to a sustainable Blue Economy and aligning with global sustainability goals.
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The environmental impact and economic feasibility assessment of composite calcium alginate bioplastics derived from Sargassum
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Researchers assessed the environmental impact and economic feasibility of producing calcium alginate bioplastics from Sargassum seaweed, presenting a novel approach that could address both plastic pollution and invasive seaweed problems in the Caribbean.
Seaweed for climate mitigation, wastewater treatment, bioenergy, bioplastic, biochar, food, pharmaceuticals, and cosmetics: a review
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Researchers reviewed the multifunctional potential of seaweeds across nine application domains, concluding that seaweed-derived biopolymers and bioactive compounds can simultaneously address climate change, wastewater pollution, and fossil fuel dependence as part of a circular bioeconomy.
Contribution of seaweed farming to the mitigation of greenhouse gas emissions and microplastics pollution
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Researchers reviewed how seaweed farming can help fight two major environmental problems: seaweed absorbs CO2 from the atmosphere without competing for agricultural land, and seaweed-derived polymers can be used to make biodegradable plastics that break down without generating persistent microplastics. Scaling up seaweed-based bioplastics remains limited by production costs, but the potential environmental benefits make further research worthwhile.
Sargassum-Derived Bioplastic for Sustainable Packaging: Evaluation of Mechanical, Thermal, and Barrier Properties
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Scientists turned Sargassum seaweed—an overabundant coastal nuisance—into a sturdy, flexible bioplastic that fully breaks down in soil within just 30 days, unlike regular plastic that can linger for centuries. This matters because everyday plastic packaging sheds microplastics that end up in our food, water, and bodies; swapping to seaweed-based alternatives could shrink that exposure while also giving a useful purpose to seaweed blooms that otherwise pile up on beaches. More testing is still needed before this material shows up on store shelves, but it's a promising step toward safer, less polluting
Innovations for Sargassum Resilience
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Researchers reviewed innovations for transforming invasive sargassum seaweed — which has caused major socio-economic harm in the Caribbean and West Africa since 2011 — into valuable products, highlighting emerging bioeconomy approaches that convert this environmental problem into a resource.
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