Tropical forest disturbances: Study reveals carbon loss and recovery dynamics

A recent study published on July 3, 2026, by Dr. Viola Heinrich from the GFZ Helmholtz Centre for Geosciences and Dr. Amelia Holcomb from the University of Cambridge examines how various disturbances impact carbon loss and recovery in tropical forests. This research highlights the crucial role of tropical moist forests in the global carbon cycle.

Understanding carbon dynamics in tropical forests

Tropical moist forests constitute approximately 70% of the world's living biomass, significantly influencing global carbon storage. While the repercussions of large-scale deforestation are well documented, the effects of forest degradation have been less understood. The study provides a comprehensive analysis of carbon dynamics post-disturbance, indicating that forest degradation results in substantial carbon losses in aboveground biomass.

Dr. Heinrich emphasizes the importance of accurate carbon accounting for national greenhouse gas inventories and international climate agreements, stating, "An accurate and consistent accounting of carbon losses and gains is of great importance for national and international reports such as the National Greenhouse Gas Inventories (NGHGI)." The research also underscores how forests that maintain structural integrity can sequester carbon more rapidly compared to completely cleared areas.

Key findings from the meta-analysis

The researchers conducted a large-scale meta-analysis synthesizing data from 146 studies to enhance understanding of tropical forest carbon dynamics. The findings reveal significant immediate carbon losses following human-induced disturbances:

• Forest fires: average carbon loss of 49%
• Selective logging: average carbon loss of 34%
• Edge-of-forest effects: average carbon loss of 31%

Moreover, the study indicates that more intense and frequent disturbances contribute to increased carbon loss. Dr. Heinrich notes, "Our synthesis highlights that degradation and regeneration processes must be taken into account more comprehensively in carbon reporting and modeling."

The recovery potential of degraded forests

Interestingly, the analysis reveals that degraded forests recover carbon more effectively than areas that have been fully deforested. After 20 years of regeneration, recovering degraded forests accumulated between 41% and 117% more aboveground carbon compared to secondary forests regrowing after complete clearing, which only achieved 1% to 74% recovery.

This finding suggests that preserving forest structure, soils, seed sources, and ecological connectivity is vital for enhancing carbon recovery in tropical forests. Dr. Holcomb adds, "A degraded forest is not a lost forest—every action we can take to reduce the intensity and frequency of disturbance helps maintain the structural integrity these ecosystems need to bounce back."