Amazon Rainforest Faces Severe Recovery Challenges from Drought

A recent study reveals that over a third of the Amazon rainforest is struggling to recover from recurrent droughts. This finding highlights a significant weakening in the resilience of this crucial ecosystem, which serves as the largest terrestrial carbon sink on Earth.

Source: BBC World Service/YouTube

The Amazon rainforest, which spans an area roughly half the size of Europe, has endured four intense droughts in less than 20 years. These events, driven by Climate change, are causing severe stress on the trees and vegetation, leading to increased mortality due to dehydration.

Historically, the Amazon’s canopy would contract and expand with the seasons, capable of bouncing back from single droughts. However, the new study, published in the Proceedings of the National Academy of Sciences, indicates that recovery has slowed significantly. This slowdown is particularly pronounced in the southeast, where droughts are more intense, and in the northwest, where they are more frequent.

The researchers analyzed satellite images of vegetation from 2001 to 2019, examining tens of thousands of 25-square-kilometer areas monthly. They correlated these images with local rainfall data to understand how drought frequency, intensity, and duration impact the stability of Amazon vegetation.

The study found that 37% of the Amazon’s mature vegetation shows signs of critical slowing down. The southeast, heavily deforested and degraded, is particularly vulnerable to a “tipping event”—a drastic shift to a drier state.

Lead author Johanna Van Passel emphasizes that the satellite data might understate the severity, as trees, the last part of the ecosystem to show stress, are already indicating significant tipping points. This suggests even more severe conditions below the canopy.

The Amazon’s ability to sequester carbon dioxide is crucial in mitigating Climate change. However, its resilience is weakening due to ongoing climate disruptions from human activities such as burning fossil fuels and deforestation. The study suggests that the slowing recovery rate may be an early indicator of large-scale ecosystem collapse.

Van Passel expresses deep concern for the Amazon’s future, warning that continued and intensifying droughts could push the forest beyond recovery. The study calls for urgent action to protect remaining mature forests, Support Indigenous and local communities, and reduce greenhouse gas emissions to prevent further degradation.

This alarming trend underscores the need for immediate global action to preserve the Amazon and combat climate change effectively.

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