how long has the amazon rainforest existed?
4675
The rainforest has been in existence for at least 55 million years, and most of the region remained free of savanna-type biomes at least until the current ice age when the climate was drier and savanna more widespread.
1379308
Between 15 and 17 percent of the Amazon rainforest has been lost, and if the amount of cleared forest land reaches 25 percent, there won't be enough trees cycling moisture through the rainforest. That will cause the rainforest to dry out and degrade into a savanna.
269202
Amazon rainforest fires sharply increased in June – raising concerns about a repeat of last year's devastation. ... In June 2020, researchers saw an average of 75 fires a day in the Amazon. Last August, during the peak of the massive forest fires that caused global outcry, there were about 1,000 fires detected per day.
1174627
Summary: Amazonia represents the quintessence of biodiversity – the richest ecosystem on earth. Yet a study by Smithsonian scientists, published this week in the journal Science, shows that differences in species composition of tropical forests are greater over distance in Panama than in Amazonia.
582311
Cattle ranching is the leading cause of deforestation in the Amazon rainforest. In Brazil, this has been the case since at least the 1970s: government figures attributed 38 percent of deforestation from 1966-1975 to large-scale cattle ranching.
489036
The Amazon Is Still on Fire. Latin America is one of the global regions most vulnerable to climate change, and increased forest fires are just one symptom.
389430
The Amazon did not evolve to burn, but for centuries, fire has been used to clear space in the rainforest for agricultural crops, from soybeans to palm to cattle.
1376768
The Amazon rainforest is still burning. ... It's an alarming increase because the Amazon almost never burns on its own and the increase in fires this year has been so dramatic. The region is usually too wet to ignite, so the vast majority of fires are caused by humans.
676854
Why are the Amazon fires such a big deal? While the bulk of the Amazon remains intact, the increasing rate of deforestation and fires could have dire consequences for the rainforest and the world, especially as global temperatures continue to rise. "The Amazon is extremely important to our global environment," said Dr.
1127895
How large is the Amazon Rainforest? The Amazon Rainforest stretches from the Atlantic Ocean in the east to the tree line of the Andes in the west. The forest widens from a 200-mile (320-km) front along the Atlantic to a belt 1,200 miles (1,900 km) wide at the Andean foothills.
669967
Since 1978 over 750,000 square kilometers (289,000 square miles) of Amazon rainforest have been destroyed across Brazil, Peru, Colombia, Bolivia, Venezuela, Suriname, Guyana, and French Guiana.
379465
The rainforest likely formed during the Eocene era (from 56 million years to 33.9 million years ago). It appeared following a global reduction of tropical temperatures when the Atlantic Ocean had widened sufficiently to provide a warm, moist climate to the Amazon basin.
205058
In parts of the eastern and southern Amazon, 30 years of concerted deforestation have shrunk viable living and breeding territories enough to condemn 38 species to regional extinction in coming years, including 10 mammal, 20 bird and eight amphibian species, scientists found.
761149
No, there are no alligators in the Amazon rainforest, although there are caiman, a type of crocodilians that are closely related to alligators.
485564
Here's everything you need to know: What's happening? Tens of thousands of fires are burning across the vast Amazon basin, consuming 4.6 million acres of irreplaceable rain forest since the beginning of the year.
148567
The Amazon hasn't stopped burning. There were 19,925 fire outbreaks last month, and 'more fires' are in the future. Advocacy organization Rainforest Alliance blames decreased enforcement of forest law, illegal deforestation and invasion of indigenous territories for rise in fire outbreaks.
566614
["AMAZON. The Amazon basin area is the world's largest forest and the most biodiverse biome in Brazil. ... ", 'ATLANTIC FOREST. ... ', 'CERRADO. ... ', 'CAATINGA. ... ', 'PAMPA. ... ', 'PANTANAL.']