A recent study published in Nature reveals the importance of degraded tropical forests for biodiversity conservation. The researchers examined forests in Sabah, Malaysia, analyzing how different levels of logging impact wildlife and plant species. They found that even logged forests, which many might consider useless, still hold significant value for conservation.

The study identifies two key thresholds for conservation. First, forests that have lost less than 30% of their biomass due to logging maintain a high level of biodiversity. These lightly logged forests can recover their original biodiversity levels if given a chance to regenerate naturally. This means that protecting these areas can be a proactive conservation strategy, preventing further damage and allowing the ecosystem to heal on its own.

On the other hand, forests that have lost more than 68% of their biomass are heavily degraded and require more intensive conservation efforts to restore their biodiversity. These areas might need active interventions like planting trees or controlling invasive species to help them recover. This type of conservation is reactive, aiming to reverse the damage already done and bring back lost species and ecosystem functions.

The findings highlight that while primary, untouched forests are irreplaceable, logged forests shouldn't be written off. They still provide critical habitats for many species and can play a vital role in broader conservation efforts. By setting clear thresholds, this study offers a practical guide for prioritizing conservation actions, helping to balance the needs for resource use and biodiversity protection.