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After direct habitat destruction, nonnative species introduced by humans to new areas pose the largest threat to global biodiversity. This program looks at how scientists and conservationists are coping with a number of these critical situations, such as on Seychelles, where rats have caused 200 years of devastation; on Scotland’s Outer Hebrides, where hedgehogs were released to control garden slugs; and in New York City, where Asian longhorn beetles threaten not only Central Park but the forests of the entire east coast. Also examined are the political and economic difficulties of these species invasions when tensions arise between the interests of environmental protection and increasing trade. (25 minutes)



 
                

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Copyright date: ©2000




     


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Alternative Power Sources and Renewable Energy
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This program demonstrates how wind turbines, solar cells, hybrid automobiles, and coal gasification plants are beginning to transform the way the world is powered. The U.S. Secretary of Energy, the director of the National Wind Technology Center, the...(more details)
 
The Collapse of the Aral Sea Ecosystem
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The Aral Sea used to be one of the world's largest and most productive inland bodies of water until a Soviet plan to turn Central Asia into the greatest cotton-producer on Earth destroyed it. Now mostly a sterile lake amidst a desert poisoned by deca...(more details)
 
Plants Out of Place: Facing the Green Invasion
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Quickly and quietly, non-native invasive plants are making deep inroads across America, depriving entire ecosystems of the living things and natural resources they depend on to survive. This program illustrates the alarming environmental and commerci...(more details)
 
Aquatic Invaders: The Rising Tide of Non-Native Invasive Species
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Canal systems, ballast water from oceangoing ships, and seemingly little things such as fish stocking, bait bucket emptying, and trailering recreational boats all provide ways for non-native invasive species to infest North America's aquatic environm...(more details)
 
The Fragile Reef: Coral in Peril
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Called "the rainforests of the sea," the world's coral reefs are home to millions of species. But these underwater ecosystems are in grave danger. This program travels to Chumbe Island Coral Park, Zanzibar; Mafia Island Marine Park, Tanzania; and Ras...(more details)
 


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