forests-凯发k8官网

13-01-29 earth's forests perform a well-known service to the planet, absorbing a great deal of the carbon dioxide pollution emitted into the atmosphere from human activities. but when trees are killed by natural disturbances, such as fire, drought or wind, t...

13-01-20 longer, warmer growing seasons associated with a changing climate are altering growing conditions in temperate（温和的） rain forests, but not all plant species will be negatively affected, according to research conducted by the u.s. forest service'...

12-08-16 a new report by u.s. and canadian scientists analyzes decades of research and concludes that the climate of the northeast has changed and is likely to change more. the report outlines the effects of climate change on multiple aspects of forests in t...

12-08-08 compared with open farmland, wooded shade plantations（种植园） that produce coffee and chocolate promote greater bird diversity, although a new university of utah study says forests remain the best habitat for tropical birds. the findings suggest t...

12-08-08 diseased trees in forests may be a significant new source of methane（甲烷） that causes climate change, according to researchers at the yale school of forestry environmental studies in geophysical research letters. sixty trees sampled at yale myers...

12-07-26 forests in the pacific northwest store more carbon than any other region in the united states, but our warming climate may undermine their storage potential. a new study conducted by the u.s. forest service's pacific northwest research station and t...

12-05-11 harvesting tropical forests for timber may not be the arch-enemy of conservation that it was once assumed to be, according to a new study led by a university of florida researcher. selective logging may be one of the few feasible options left for co...

11-12-21 forest thinning to help prevent or reduce severe wildfire will release more carbon to the atmosphere than any amount saved by successful fire prevention, a new study concludes. there may be valid（有效的） reasons to thin forests -- such as restorat...

11-09-08 each year, more than 170 million people visit national forests for recreation（娱乐，消遣） . and the physical activity associated with these visits burns 290 billion food calories. that equals enough french fries laid end to end to reach the moon a...

10-12-07 foreign pests are eating their way through our national forests, destroying majestic（庄严的，宏伟的） scenery and costing taxpayers millions of dollars. if enforcement efforts to prevent their importation aren't stepped up, irreplaceable（不能替代...