A: Rainforests are forests characterized by high rainfall, with annual rainfall in the case of tropical rainforests between and centimeters 98 and in , and definitions varying by region for temperate rainforests. The monsoon trough, alternatively known as the intertropical convergence zone, plays a significant role in creating what? A: The climatic conditions necessary for the Earth's tropical rainforests. Around what percentage of all biotic species are indigenous to the rainforests? There may be many millions of species of plants, insects and microorganisms still what? A: Undiscovered in tropical rainforests.
Oh no, there's been an error
Rainforest | Rio Wiki | FANDOM powered by Wikia
The thousands of fires burning in the Amazon don't look like the major forest fires of Europe or North America -- instead, they are fueled mainly by branches, vegetation and other byproducts of deforestation in cleared areas, experts say. The dramatic scale of this year's fires is the result of a significant acceleration of deforestation for the lumber industry, for agriculture or for other human activities. And part of the reason why that works is because those fires don't generally move into the forest," he explained. California has the opposite problem: burning waste is prohibited because the forests are so dry, they could go up in flames at the smallest spark. But in the Amazon, when an area of forest is cleared, the tree trunks are removed and the rest of the vegetation is burned on the spot during the dry season, which lasts from July to November.
The undergrowth in a rainforest is restricted in many areas by the lack of sunlight at ground level. This makes it possible to walk through the forest. If the leaf canopy is destroyed or thinned, the ground beneath is soon colonized by a dense, tangled growth of vines , shrubs , and small trees called a jungle.
The Amazon River winds through the heart of the lush rain forest. The Smithsonian National Zoological Park notes the Amazon's rain forest is the planet's most ancient, potentially having formed million years ago. Brazil holds the greatest expanse of Amazonian forest, with the rain forest covering 40 percent of the nation's land. The Amazon averages between 98 and inches of rainfall annually, and rain falls upon the forest about days every year. The Amazon Center for Environmental Education and Research indicates the Amazon's plant life produces more than 20 percent of our planet's oxygen, making the rain forest a vital component of Earth's ecosystem.