标签:Ecosystem 相关文章
NOEL KING, HOST: Deep inside Northeast India, a forest has come bounding back thanks to one man. He's a farmer. NPR's Julie McCarthy traveled to see him, and she has this report. JULIE MCCARTHY, HOST: We've come to one of the most geographically isol
SCIENCE IN THE NEWS - Everglades National Park One of the Worlds Great Biological Wonders From VOA Learning English, this is SCIENCE IN THE NEWS in Special English. Im Faith Lapidus. And Im Shirley Griffith. This week, we tell about Everglades Nation
Imagine a world without elephants. Not only would we have lost one of the planets most charismatic, extraordinary creatures. Also gone would be a network of ecosystem engineersbecause elephants are crucial for other creatures to exist. They disperse
Small carnivoreslike foxes or raccoons or badgersare themselves prey for larger predatorslike wolves. So they spend time hiding instead of hunting. This influence that big predators have on their ecosystem is called a landscape of fear. But humans ar
By Cathy Majtenyi Nairobi 08 November 2006 Nobel Peace Prize winner Wangari Maathai Wednesday called on the world to plant one billion trees as part of a global effort to fight climate change. She launched the initiative at the United Nations' Clima
A new survey of Internet security says the computer attacks are increasingly being used to make money, rather than simply to make mischief. Virus writers are finding also ways to amplify their powerthey're renting out robot armies of computers under
By Zulima Palacio Kauai, Hawaii 18 June 2007 The Hawaiian archipelago represents the most isolated group of islands in the world. Plants and animals that are common to many people elsewhere only made it to these islands in the last few hundred years
By Nico Colombant Conakry, Guinea 06 February 2008 In Guinea, as in many other coastal parts of West Africa, entire communities depend on fishing as their essential source of income. The industry remains one of the region's most lucrative. But severa
Study: Giving Local Fishermen Control Prevents Overfishing Exponential decay Tropical coral reefs are fertile fishing grounds for some 200 million small-scale fishers around the world. But many of these reefs are in decline. Tim McClanahan with the W
For the past 2.5 years, two agriculture experts from the U.S. state of Texas have been working in remote areas of Afghanistan to help nomadic herders better manage their sheep, goats and cattle, and to better deal with ever-changing environmental co
Holiday Season Features Latest, Hottest Electronic Gadgets From tablet computers to smart cameras, the holiday season is a time when shoppers are on the lookout for the newest and coolest electronic devices on the market. When it comes to electronic
Rival GDP Measure Puts Emphasis on Social Progress Since the early 20th century, the United States has topped the global table of Gross Domestic Product. According to the new Social Progress Index, though, the best country in the world is Sweden. The
Pioneering Soil Researcher Wins Top Environment Prize Biologist Diana Wall went to the ends of the earth - the seemingly lifeless Antarctic desert - to study the life in soil. What soil life does for us, it provides us with many benefits that we don'
Pangolins Are Most Trafficked Mammal 穿山甲因被贩卖已成世界上最濒危的哺乳动物 Have you ever heard of a pangolin? A lot of people havent. Its also known as a scaly anteater. Conservation groups say its the worlds most illegally tra
Where every plant and animal helps sustain the whole.The waste from parrot fish cements the reef. Stinging anemones provide a haven to the vulnerable. Even killers play their part, preventing a population explosion that would destroy this fragile eco
Mighty carnivores ruled a dangerous world in the Cretaceous Period. But being a super predator like Tyrannosaurus Rex is not easy. Just surviving to adulthood is a major feat, one that takes a decade or more of killing and eating some of the meanest
Overfishing Whales and the Environment 过度捕鲸与环境 Until recently, when scientists studied changes in open-ocean ecosystems, they looked at changes in the bottom of the food chain that gradually make their way to the top, like food shortage
By Greg Flakus Prescott, Arizona 03 November 2006 watch Forest Fire Prevention In the western United States this year nearly four million hectares of land have been scorched by fire, in the worst wildfire season on record. Twenty-one firefighters ha
By Scott Stearns White House 15 June 2006 President Bush has created the world's largest marine reserve. Mr. Bush acted to protect an area of the Pacific Ocean that is roughly the size of California. More than 7,000 species of marine life live in a
Deep Seagrass Bed Could Stall Climate Change, If Climate Change Doesn't Kill It First MICHEL MARTIN, HOST: Staying on the subject of climate change for a few more minutes, there was another bright spot this past week amid all the dire warnings we hav