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Is Amazon nearing tipping point?

New research explores critical transitions in the Amazon forest system
Katie Hill - Editor-in-Chief, My Green Pod
Is the Amazon nearing a tipping point?

Global warming may be interacting with regional rainfall and deforestation to accelerate forest loss in the Amazon, pushing it towards partial or total collapse.
Research published yesterday (14 Feb) in Nature has identified the potential thresholds of these stressors, showing where their combined effects could produce a ‘tipping point’ where the forest is so fragile that just a small disturbance could cause an abrupt shift in the state of the ecosystem.

A thriving Amazon

The study was led by the Federal University of Santa Catarina in Brazil, and includes experts from the University of Birmingham.

Its authors hope that by understanding the most important stressors on the rainforest environment, they can develop a pathway for keeping the Amazon forest resilient. 

‘Compounding disturbances are increasingly common within the core of the Amazon. If these disturbances act in synergy, we may observe unexpected ecosystem transitions in areas previously considered as resilient, such as the moist forests of the western and central Amazon.’

Lead author, University of Santa Catarina

These ecosystem transitions could include a forest that may be able to recover but is still trapped in a degraded state and dominated by opportunistic plants such as bamboos and vines, or a forest that is unable to recover and remains trapped in an open-canopy, flammable state.

Climate and the Amazon

The research findings are important because of the vital role the Amazon plays in the global climate system.

For example, Amazonian trees store massive amounts of carbon which, if released, could accelerate global warming.

‘We have evidence showing that rising temperatures, extreme droughts and fires are can affect how the forest functions and change which tree species can integrate the forest system.

‘With the acceleration of global change there’s an increasing likelihood that we will see positive feedback loops in which, rather than being able to repair itself, the forest loss becomes self-reinforced.’

Co-author, Birmingham Institute of Forest Research

Cooperating for success

The study also examined the roles of biodiversity and local communities in shaping Amazonian forest resilience.

They argue that successful approaches will depend on a combination of local and global efforts.

This will include cooperation between Amazonian countries to end deforestation and expand restoration, while global efforts to stop greenhouse gas emissions mitigate the effects of climate change.  
During the recent COP28 Climate Conference, the team published a set of policy briefs setting out steps that local, regional and global organisations need to take to prevent the Amazon from reaching a tipping point.

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