Download Forests: More Than Just Trees (Natural Resources) by Julie Kerr, Ph.D. Casper PDF

By Julie Kerr, Ph.D. Casper

Makes a speciality of the various elements that make rain forests, temperate forests, and boreal forests this sort of precious usual source and why we won't reside with out them.

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Extra info for Forests: More Than Just Trees (Natural Resources)

Example text

Scientists have been able to put this puzzle together by studying fossil remains of ancient tropical forests in areas that today are too cold or dry to support those types of forests. 17 18 forests “supercontinent” eventually separated and drifted apart, forming the seven different continents that exist today. Several factors determine what types of forests can successfully grow in a specific location. Temperature, rainfall, amount of sunlight, wind, soil type, the interaction of other plants as well as animals, and the effects of urbanization all play a critical role in determining which types of trees will be successful.

The native inhabitants of the rain forest use more than 2,000. • C  urrently, 121 prescription drugs sold worldwide come from ­plant-­derived sources. Approximately 25% of Western pharmaceuticals are derived from rain forest ingredients, but less than 1% of these tropical trees and plants have been tested by scientists for their therapeutic benefits. S. Cancer Institute has identified 3,000 plants that are active against cancer cells. Of these, 70% are found in the rain forest. ­Twenty-­five percent of the active ingredients in today’s ­cancer-­fighting drugs come from organisms found only in the rain forest.

The Cashinahau tribe lives in Peru. In keeping with their customs, many have body piercings and wear body paint. Their homes are crude structures made of natural materials, such as leaves and sticks held together by mud. The Maroons are found in the rain forests of Africa. Scientists believe this tribe represents the descendants of slaves that escaped generations earlier. They live a very quiet ­ family-­oriented lifestyle along the river. Often a family will pass its plantations down from generation to generation.

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