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Sun-deprived, nutrient-poor, the soil of the tropical rain forest contributes little to its lush growth. Conversely, ongoing symbiotic relationships among plants and animals high in the forest’s tree canopy all but ensure its survival. In this program, teams of biologists unlock the secret of the canopy by revealing the activities that occur there and their importance to the rain forest’s ecosystem. (51 minutes)



 
    

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Copyright date: ©1994




     


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The Chemistry of a Forest

A 30-year study at the Hubbard Brook experimental forest in New Hampshire has taught botanists, organic chemists, and environmentalists the complexity of an ecosystem impacted by rainfall, sunlight, airborne chemicals, and controlled timber harvests....(more details)
 
Fragile Ecosystems

This program looks at three fragile ecosystems, all in danger of destruction from human activity: marshes, the implication of whose destruction on wildlife, water tables, and an increasing number of other aspects of the entire biosphere is only begin...(more details)
 
Mount St. Helens: Out of the Ash

In 1980, after 123 years of slumber, Mount St. Helens erupted, destroying 200 square miles of forest and much of the life in the surrounding area. This program provides an in-depth scientific analysis of this historic event-the actual eruption, its g...(more details)
 
The Tropical Rainforest

The rainforest is home to the highest concentrations of life on Earth. This program shows us the South and Central American rainforests-a plethora of different worlds, of sharp and subtle contrasts cloaked in the uniform covering of the forest. Survi...(more details)
 


See additional titles in Animal Biology | Ecology | Plant Biology | Ecosystems