Underwater blue forests formed by large marine algae cover less than 10% of the area of terrestrial forests, yet can store as much CO2 as their land-based counterparts
Despite being widely distributed around all oceans, large marine algae are not considered a key element to fight against climate change
Oceana calls for the inclusion of algal forests in official climate plans and strategies, and for the creation of an International Action Plan to preserve these valuable marine ecosystems. Oceana is presenting a photo exhibition at the UN Climate Change Conference (COP25) to showcase the key role of these ‘blue forests’ in storing CO2 and to warn that, due to a lack of protection, we lose between 1% and 7% of their area every year.
So-called ‘blue forests’, composed of large marine algae, are widespread across the planet and thousands of species depend on them to survive. In fact, the higher level of biodiversity within ‘blue forests’, the more CO2 that will be stored, and the more resilient the oceans will be in the face of destabilising threats.
“Blue forests are one of the main lungs of our oceans – we should protect them as they deserve. Scientific reports tend to focus on terrestrial forests, but marine algae can account for as much as one-fifth of the CO2 stored by oceans. It is vital that the Intergovernmental Panel on Climate Change (IPCC) take them into account, and that decision makers include their protection within international policies against the climate crisis”, said Ricardo Aguilar, Senior Research & Expeditions Director of Oceana in Europe.
The role of the oceans as allies in fighting climate change is typically undervalued, yet up to 1000 tonnes of CO2 can be stored within a single hectare of marine vegetation. Even when ocean ecosystems are factored into climate change plans, blue forests are often dismissed, even though they can store as much CO2 as mangroves, marshes and seagrass meadows combined.
More than 17 000 species comprise large marine algal forests, of which the following are among the most common ones: