The Guardian
‘Critical slowing down’ of recovery raises concern over forest’s resilience to ecosystem collapse.
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Drought last year left the Amazon’s rivers, including the Rio Negro tributary, at record low levels. Photograph: Andre Coelho/EPA.
More than a third of the Amazon rainforest is struggling to recover from drought, according to a new study that warns of a “critical slowing down” of this globally important ecosystem.
The signs of weakening resilience raise concerns that the world’s greatest tropical forest – and biggest terrestrial carbon sink – is degrading towards a point of no return. (...)
They found 37% of the mature vegetation in the region exhibited a slowing-down trend. While the patterns varied from area to area, they concluded that the highly deforested and degraded south-eastern Amazon was most vulnerable to a “tipping event”: in other words, a calamitous decline of the tropical rainforest to a different, drier state. (...)
The paper says the slowing recovery rate of the forest may be an “early indicator” of large-scale ecosystem collapse. (...)
“The message to policymakers is that we must protect the forest that is still there, especially in the south of the Amazon. Farmers should stop cutting forest because they lose out when this reduces rainfall,” Van Passel said. “We must stop climate change. We have all this information, now let’s act on it … I’m worried, but hopeful.”
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