Episode Details

The Seaweed Story

Seaweed is a crucial part of ecosystems in several parts of the world, including our local California coasts. However, seaweed does more than just offer a home to local marine life. It also has immense carbon sequestration potential, and contains helpful compounds for a variety of different products. Because of these potential benefits, a new industry has arisen: aquaculture. This term refers to farming in the ocean, specifically of seaweed, in order to harness the valuable resources that can be derived from the plant. 

Seaweed can be a more environmentally friendly way of growing food as it does not require the use of fertilizer, pesticides, freshwater, or land. According to The Nature Conservancy, global food production accounts for 80% of land degradation, 70% of freshwater use, and 33% of greenhouse gas emissions. Because of its lessened need for land resources, seaweed farming reduces these negative impacts on the environment. It also grows rapidly, and can be harvested in as little as six weeks. It also works as an underwater carbon sink, and can take in huge amounts of carbon, nitrogen, and phosphorus, helping to clean the oceans and reduce the risk of dead zones—areas where nutrients from fertilizer cause low oxygen levels in water due to runoff and prevent life.

While farmed seaweed is not a new concept—it has roots in coastal economies, cultures, and diets, particularly in Asia—the industry has grown to become a $16.7 billion market. Two of the companies that have stepped in to harness the power of seaweed include Ocean Rainforest and Altasea. According to Ocean Rainforest, their mission is to “use science, innovation and expertise to apply sustainable methods to grow and harvest seaweed and process it into premium quality products for our target customer segments.” The company cultivates seaweed in the North Atlantic and the Pacific Ocean, and creates products including biostimulants, pet feed, skincare serums, and ingredients for restaurants. 

AltaSea operates their farms at the Port of Los Angeles, and “is dedicated to accelerating scientific collaboration, advancing an emerging Blue Economy through business innovation, and job creation, and inspiring the next generation, all for a more sustainable, just, and equitable world.” On top of selling seaweed related products and services, AltaSea also focuses on conducting research and creating programs that immerse children and adults in ocean education. 

One potential challenge the seaweed industry is facing is the fight for space on the coastline, between commercial shipping companies, military vessels, oil platforms, and wildlife protected areas. Also, there is always a risk to altering an ecosystem, even in the case of aquacultu