The State of the World’s Seaweeds: Our algal allies are under threat - Natural History Museum

Seaweeds are some of the most important organisms on Earth. They lock up carbon dioxide, sustain life in the sea and support multi-billion-pound industries.

Their existence, however, is under threat. A new initiative aims to change the fate of seaweeds for the better.

A landmark report has laid out the threats facing the world’s seaweeds – and how urgent action is needed to save them.

The State of the World’s Seaweeds report shows that these organisms are a vital part of our planet, forming habitats that are relied on by animals and people alike. They have important roles to play in combatting the climate crisis, plastic pollution and world hunger, but are often underappreciated.

The report’s authors argue that this needs to change in the face of the multitude of threats seaweeds are facing. Climate change, pollution and overharvesting are all pushing seaweeds towards their limits but conservation efforts are sparse.

Dr Sophie Corrigan, the lead author of the report, says that “urgent action” is needed to fully assess how threatened seaweeds are, and that a global effort is needed to help save them.

“Seaweeds sometimes have a bit of a negative reputation as slimy, unpleasant things, but they’re really beautiful and important,” Sophie explains. “Food, medicines and even the cosmetics industry rely on seaweed for the properties they can offer. We still haven’t realised the full potential of seaweeds and their uses. Safeguarding the future of seaweeds will require a global movement to unite governments, researchers, industries, charities, Indigenous Peoples and local communities in protecting seaweeds. This report is the first step in that process.”