About 500 kilos of green stones with juvenile algae are spread in the ocean to regenerate underwater forests, reduce costs, and accelerate the restoration of marine habitats.

Written by Flavia Marinho

Published on 28/05/2026 at 21:20

Updated on 28/05/2026 at 21:21

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Innovative green gravel technique places stones covered with young algae on the seabed to restore kelp forests, protect coastal ecosystems, strengthen marine biodiversity, and reduce large-scale restoration costs, making it possible to recover degraded areas efficiently and sustainably

The use of green stones with juvenile algae is transforming the way of reforesting marine kelp forests without needing divers for each installation. The technique involves cultivating young algae on small stones in a laboratory and then spreading them in the ocean, allowing them to continue growing and forming new submerged ecosystems.

This approach can reduce restoration costs, expand the reach of actions in degraded areas, and accelerate the regeneration of habitats essential for biodiversity and fishing. The visualization of the stones cast into the sea creates an impressive effect and facilitates the understanding of applied science in a simple and direct way.

How green gravel works and why it is effective

The method called green gravel starts with the cultivation of kelp spores in a laboratory until small algae attach to the stones. These stones, already covered by juvenile algae, are spread on the seabed, where the algae continue to develop and begin to form new marine forests.

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Scientific evidence supports restoration with green gravel

The information was published by Scientific Reports, an open-access scientific journal. It shows that green gravel with young algae survives and grows in the natural environment without direct intervention from divers. Researchers confirmed that the stones function as underwater seeds, aiding in the regeneration of kelp forests.

The study indicates that this technique has the potential to significantly expand marine restoration. It offers a practical and sustainable alternative compared to traditional manual planting.

Real experiences with large quantities of juvenile algae

The information was released by The Nature Conservancy, an environmental conservation organization, detailing the use of nearly half a million juvenile algae distributed on 500 kilos of green stones in specific marine areas. This action allowed for the restoration of degraded ecosystems more quickly and on a large scale, serving as an example for future ocean reforestation projects.

technique replaces part of the manual work of divers and allows for more efficient restoration of large areas — Technique replaces part of the manual work of divers and allows for **more efficient restoration of large areas**

Monitoring showed that the young algae continued to develop and contributed to the formation of new underwater forests, strengthening local biodiversity and natural habitats.

Benefits for ecosystems and coastal communities

The deployment of stones with juvenile algae helps protect marine life, increases kelp production, and improves local fishing. Additionally, the technique promotes carbon absorption by the oceans, contributing to climate change mitigation.

The green stones facilitate the propagation of algae

The possibility of reducing costs and scaling restoration makes it feasible for fishing cooperatives, universities, and environmental agencies to adopt the practice in various coastal regions. This accelerates the recovery of degraded areas.

Impact of the technique on marine restoration

The green gravel represents a significant shift in the way submerged ecosystems are restored. It allows large areas to be regenerated quickly and with less human effort, paving the way for more ambitious and efficient marine conservation projects.

In addition to restoring algae and habitats, this technique strengthens the oceans’ ability to sustain marine species. It protects coastal zones from erosion and environmental degradation.

The use of pebbles with juvenile algae offers an innovative and visually impactful solution to restore the oceans, efficiently uniting science and practice to generate ecological and economic benefits.

Do you believe that this green stone technique could become the future of large-scale marine restoration?

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About 500 kilos of green stones with juvenile algae are spread in the ocean to regenerate underwater forests, reduce costs, and accelerate the restoration of marine habitats.

Innovative green gravel technique places stones covered with young algae on the seabed to restore kelp forests, protect coastal ecosystems, strengthen marine biodiversity, and reduce large-scale restoration costs, making it possible to recover degraded areas efficiently and sustainably

How green gravel works and why it is effective

Scientific evidence supports restoration with green gravel

Real experiences with large quantities of juvenile algae

Benefits for ecosystems and coastal communities

Impact of the technique on marine restoration

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About 500 kilos of green stones with juvenile algae are spread in the ocean to regenerate underwater forests, reduce costs, and accelerate the restoration of marine habitats.

Innovative green gravel technique places stones covered with young algae on the seabed to restore kelp forests, protect coastal ecosystems, strengthen marine biodiversity, and reduce large-scale restoration costs, making it possible to recover degraded areas efficiently and sustainably

How green gravel works and why it is effective

Scientific evidence supports restoration with green gravel

Real experiences with large quantities of juvenile algae

Benefits for ecosystems and coastal communities

Impact of the technique on marine restoration

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