The Amazon Rainforest is the forest that grows in the tropical basin of the Amazon River.

The forest lies in a basin drained largely by the Amazon River, with 1100 tributaries. This basin was formed in the Paleozoic period, between 500 and 200 million years ago.

Biodiversity

Wet tropical forests are the most species-rich biome, and tropical forests in the Americas are consistently more species rich than are African and Asian wet forests^[1]. As the largest tract of tropical rainforest in the Americas, Amazonian rainforests have unparalleled biodiversity.

The region is home to ~2.5 million insect species, tens of thousands of species of plants, and some 2000 species of birds and mammals. The diversity of plant species is the highest on earth with some experts estimating that one square kilometre may contain over 75,000 types of trees and 150,000 species of higher plants. One square kilometre of Amazon rainforest can contain about 90,000 tons of living plants. This constitutes the largest collection of living plants and animal species in the world. One in five of all the birds in the world live in the rainforests of the Amazon. To date, an estimated 438,000 species of plants of economic and social interest have been registered in the region with many more remaining to be discovered or cataloged. (Note: Brazil has one of the most advanced laws to avoid biopiracy, but enforcing it is a problem.)

Amazonian forests as a store of carbon dioxide

More than one fifth of the Amazon Rainforest has already been destroyed. The forest which remains is threatened. People who care for the environment warn about the loss of biodiversity. They also point out that releasing the carbon which is stored in the trees will increase global warming.

Conservation

Some people have calculated that it may even pay to save the forest. They said that one hectare of Amazonian forest in Peru is worth about US $ 6280, if it is used to harvest fruits, latex and timber (wood). If all the wood is cut down for timber, it has a value of about US $ 1000. Obviously, this can only be done once; it is not sustainable. When the forest has been cleared, the hectar of land can be used as a pasture, and is worth about US $ 148. Not all people agree on the study; some have questioned the assumptions behind it.

The Força Aérea Brasileira has been using EMBRAER R-99 surveillance aircraft to monitor the forest. This was done as part of the SIVAM program. At a conference in July 2004, scientists warned that the rainforest will no longer be able to absorb the millions of tons of greenhouse gases annually, as it usually does, because of the increased speed of rainforest destruction.

9,169 square miles of rain forest were cut down in 2003 alone. In Brazil alone, European colonists have destroyed more than 90 indigenous tribes since the 1900's. With them have gone centuries of knowledge of the medicinal value of rainforest species. As their homelands continue to be destroyed by deforestation, rainforest peoples are also disappearing.

The Rubber Boom

Once the process of vulcanization was invented, companies began to make many kinds of new rubber products, such as boots and seals for machines. American and European companies began buying large amounts of latex from Brazil. This boom in Brazilian rubber began around 1870, but it was the need for automobile tires that brought the greatest wealth to the new rubber producers.^[1]

Other rain forest had rubber trees, but in Amazonia were by far the best. However, the trees could not be planted on farms or plantations because if they were next to each other, the insects would eat them. Therefore, people had to find the trees in the rain forest, cut slits in them, leave cups to collect the latex, and come back later to get it.^[1] Thousands of people moved to the rain forest to work collecting rubber. Most of these people were hired by wealthy rubber merchants. The rubber merchants loaned them money to come down the river and buy tools. Each rubber merchant’s collectors were forced to sell the rubber only to their rubber merchant at low prices and buy supplies only from them at high prices. That meant the collectors were always in debt to their merchant and could not leave to do something else. The rubber merchants quickly became very rich. The center of the rubber trade was the city Manaus on the Rio Negro. ^[1]It became first a boom town and then a beautiful, wealthy city. It had electricity before most of the cities in the United States did. ^[1] The newly rich merchants built huge expensive homes and brought in new automobiles to travel on the city’s few roads. They built a magnificent opera house with crystal chandeliers and decorated tiles brought all the way from Europe.^[1]

However, the rubber boom only lasted about forty years, ending by 1913. ^[1]Some men had taken the seeds of the Amazon rubber trees and began growing them in the Asian rain forests. The trees grew well there, and they could be grown on plantations. The insects that could destroy them were in South America. So the price of rubber began to fall, and the rubber boom stopped.^[1]

Other pages

• Ecology
• Forestry

Notes

1. ^  Turner, I.M. 2001. The ecology of trees in the tropical rain forest. Cambridge University Press, Cambridge. ISBN 0-521-80183-4

2. ^  Melillo, J.M., A.D. McGuire, D.W. Kicklighter, B. Moore III, C.J. Vörösmarty and A.L. Schloss. 1993. Global climate change and terrestrial net primary production. Nature 363:234–240.

3. ^ Tian, H., J.M. Melillo, D.W. Kicklighter, A.D. McGuire, J. Helfrich III, B. Moore III and C.J. Vörösmarty. 2000. Climatic and biotic controls on annual carbon storage in Amazonian ecosystems. Global Ecology and Biogeography 9:315–335.

Other websites

• Some links to help save the rainforest for free by clicking once every day
• Amazon burning
• More info on the Amazon Rainforest

References

1. ↑ ^{1.0 1.1 1.2 1.3 1.4 1.5 1.6} History and Geography. LIFEPAC. Alpha Omega Publications. pp. 26. ISBN 978-1-58095-155-5.