Rivers run dry as drought hits Amazon

Erik German and Solana Pyne in the GlobalPost: ...October marked the end of one of the worst Amazon droughts on record — a period of tinder-dry forests, dusty cropland and rivers falling to unprecedented lows. Streams are the highways of the deep jungle and they’re also graveyards for dead trees, usually hidden safely under fathoms of navigable water.

…While the region has seen dry spells before, locals and experts say droughts have grown more frequent and severe. Scientists say there’s mounting evidence the Amazon's shifting weather may be caused by global climate change.

…“Every ecosystem has some point beyond which it can’t go,” said Oliver Phillips, a tropical ecology professor at the University of Leeds who has spent decades studying how forests react to changing weather. “The concern now is that parts of the Amazon may be approaching that threshold.”

…It still remains to be seen whether the rain forest’s ability to absorb greenhouse gases has been permanently harmed. “We can’t say for sure — it could be happening now,” Phillips said. “Often you don’t know you’ve passed a turning point until you’ve already passed it.”

Phillips said he’s worried about yet another drought following so closely after the last. Along the edge of the forest in Peru and Bolivia, there were more fires this year than any year on record, he said, along with reports of substantial damage to plants in the normally wet northwestern Amazon….

Satellite image of the Xingu River in Brazil, via NASA