Rising temperatures could be passing tolerance threshold for endangered animals as Lake Tefé reaches 39C
The sudden die-off of more than a hundred Amazonian river dolphins in recent days has prompted fears that rising global heat could be passing the tolerance threshold of species in vulnerable areas.
Residents of this small community in Amazonas state described the scene in apocalyptic terms. “The past month in Tefé has seemed like a science-fiction climate-change scenario,” said Daniel Tregidgo, a British researcher living in the area. “Regular sightings of pink river dolphins are one of the great privileges of living in the heart of the Amazon. Pretty much every time I go to the market to have breakfast I see them come to the surface and it reminds me why I live here.
More than 100 river dolphins have died in one part of the Amazon in recent days, as severe drought affects the depth and temperature of the river.Ayan Fleischmann, a geoscience researcher at the Mamirauá Institute, said several possible causes were being investigated, including disease and sewage contamination. But he said the water depth and temperature were “certainly a main component” of the mass mortality. “At 6pm yesterday, in Lake Tefé we measured more than 39C .
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