What is Kelp Farming?
Kelp farming, or seaweed aquaculture, involves the cultivation of large brown algae, such as kelp, in marine environments. While primarily done for food, feed, or bio-products, research is exploring its potential for carbon sequestration, either by sinking kelp to the deep ocean or integrating it into other carbon cycles.
Why is Kelp Farming important?
Kelp farming is important for its potential to contribute to ocean-based carbon removal, as kelp rapidly absorbs CO₂ during growth. It also offers ecological benefits like creating marine habitats, absorbing excess nutrients, and supporting local economies, particularly in coastal communities.
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Frequently asked questions
Kelp rapidly absorbs CO₂ from the water as it grows. The carbon can then potentially be sequestered if the kelp is sunk to the deep ocean, incorporated into durable products, or used to enhance soil carbon.
Farmed kelp is used as food for human consumption, animal feed, a source of biofuels, fertilizers, and for producing various chemicals and hydrocolloids (e.g., alginate).
Sinking kelp to the deep ocean for long-term carbon storage is an emerging concept under research. Challenges include ensuring permanence, monitoring, and understanding ecosystem impacts.