An innovative study published in Nature confirms that secondary tropical forests can recover more than 90% of their biodiversity in just 30 years, within a single human generation.
The research was conducted in the western Chocó of Ecuador, one of the most biodiverse and threatened ecosystems on the planet, and demonstrates that natural regeneration is a scalable and cost-effective solution to the global biodiversity crisis.
Advanced Methodology
The study, titled “Biodiversity resilience in a tropical rainforest”, utilized state-of-the-art tools:
- Artificial intelligence.
- Bioacoustic monitoring.
- Environmental DNA (eDNA).
More than 10,800 species and 23,500 bacterial sequences were analyzed across 16 taxonomic groups, making it one of the most comprehensive assessments of biodiversity recovery in tropical forests.
Main Results
- Secondary forests recover on average 90% of the abundance of individuals and species diversity in 30 years.
- The species composition reaches 75% similarity with primary forests.
- Regeneration occurred without active reforestation, solely through land protection.
This means that, although the ecosystem is not identical to the original, it manages to restore much of its ecological functions and characteristic species.
Return of Wildlife
Regeneration already shows visible results in the Canandé Reserve of Jocotoco:
- Rediscovery of the horned marsupial frog (Gastrotheca cornuta), Critically Endangered.
- Regular presence of the great curassow (Crax rubra) and the giant anteater (Myrmecophaga tridactyla).
- Increase in populations of brown-headed spider monkeys (Ateles fusciceps fusciceps), an Ecuadorian subspecies critically endangered.
- Recovery of endemic species of magnolia, such as Magnolia dixonii, reclassified from Critically Endangered to Endangered.
The Role of Animals in Regeneration
Researchers emphasize that animals not only benefit from regeneration but are key agents:
- Bats and birds disperse seeds.
- Dung beetles bury seeds in the soil.
- Mammals and pollinators ensure plant reproduction.
This feedback cycle accelerates recovery and strengthens the ecosystem’s resilience.
Global Implications
The study underscores that natural regeneration requires sustained protection and long-term conservation. Jocotoco, along with community partners, is creating a network of protected areas from the Chocó tropical forests to the Andean páramos, connecting ecosystems and increasing their regeneration capacity.
Given that 60% of the world’s tropical forests have already been lost or degraded and 70% of the remaining are secondary, these findings offer a global roadmap to reverse biodiversity loss and tackle climate change.
Research in the Ecuadorian Chocó demonstrates that nature has astonishing resilience and that natural regeneration can be a powerful tool for conservation. With sustained protection and community commitment, tropical forests can recover their biodiversity in a single generation, offering hope in the face of global environmental collapse.
