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What would happen if the Amazon rainforest dried out? This decades-long experiment has some answers

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Esecaflor is the longest-running project of its kind in the world.

The project, located in the Caxiuana National Forest , assembled about 6,000 transparent plastic rectangular panels across one hectare ( 2.5 acres ), diverting around 50% of the rainfall from the forest floor.

It shows that during the years of vegetation loss, the rainforest shifted from a carbon sink to a carbon emitter.

Esecaflor ’s drought simulation draws some parallels with the past two years , when much of the Amazon rainforest, under the influence of El Nino and the impact of climate change, endured its most severe dry spells on record.

“We know very little about how drought influences soil processes,” says ecologist Rachel Selman .