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Equatorial Rainforest.

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Introduction

Form 5B2 02/11/03 Geography Khamal Hodge Geography Midterm Assignment Equatorial Rainforest is the name given to the area in which luxuriant, evergreen, broad-leafed vegetation is dominant. This vegetation grows in profusion 0� to 10� north and south of the Equator and is termed selva. This type of vegetation grows as a result of the daily heavy rainfall (over 2500 mm per year). As equatorial rainforests are located in the equatorial zone the sun is nearly always overhead. This results in high temperatures, usually around 27�C and speeds up the rate at which the plants can photosynthesise. In equatorial rainforests it is also very humid (80% and above). Examples of equatorial rainforest are the Amazon Basin and the Zaire Basin. Other examples can be found in Indonesia and the East Indies. In the rainforest, many species grow in a relatively small area. There are areas where over 40 species may grow in a hectare. Trees in the rainforest grow in layers. The layers are the Upper Layer (54 m high), the Middle Layer (15 m to 45 m) and the Under Layer (5 m to 15 m). The trees in the Upper Layer form a thick canopy with their leaves, which blocks 95% of the sunlight. ...read more.

Middle

Equatorial Rainforests are very important in the world today. They are the largest ecosystems in the world today and play a major role in the biological diversity (biodiversity). Biodiversity can be defined as the variety and variability among living organisms in their ecosystem. Equatorial Rainforests provide home for half of the world's plant and animal species. Many of these species whether plant or animal cannot live without each other, as they are inter-related. Some species of animal need to feed on a certain species of plant, while some species of plant rely on a certain species of animal to spread their pollen. When the rainforest is cleared, certain species of plant are destroyed. The animals (herbivores) which, use to feed on them, now have problems in finding food. These species begin to die out, and because of this the species that use to rely on them for food, begin to die out also and so on. As a result of the destruction of rainforests many species of plant and animal that have not yet been discovered by scientists have become extinct. Equatorial Rainforests are also important in that they balance the amount of Carbon Dioxide in the atmosphere. ...read more.

Conclusion

It usually takes some time and it is not easy for these primitive people to resettle. These people's main source of water is the river. The people bathe in the river water, they use it to cook and to wash. When chemicals from mining contaminate this water and they use it they become very sick. As they are not as sophisticated as people in the modern world, they have no cure or protection against these sicknesses or diseases; as a result they often die. For all the various reasons stated above it is necessary that Equatorial rainforests be conserved. In the world today, 15 of the 70 rainforests countries have their rainforests in a conservation scheme. In some of the other countries the rainforests are not in conservation schemes but laws have been passed which prohibit the clearing of rainforest land for any purpose. In England and some other European nations including Germany foundations are encouraging people to boycott goods that have been made using tropical timber from rainforests. As a result of all this, the use of rainforests for timber has somewhat decreased. Some manufacturing companies no longer use mahogany and teak to make furniture. They instead use plastic or aluminium and then cover it with a layer of veneer. ...read more.

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