Science news articles about 'tree death'

... fire suppression as main causes of plant death. "Plants are dying out at the bottom of their ranges, and at the tops ... trees; sugar bush, California lilac, Muller scrub oak, creosote bush, ragweed, ...

... long-term data sets taken from trees across the Pacific Northwest, California, Idaho, Colorado and Arizona. The article concludes that tree death rates have more than doubled in recent decades in ...

... 1950s drought, the 2000 drought killed trees at wetter as well as drier sites, Breshears ... mortality in field studies elsewhere also suspect tree death is linked to temperature. They reported earlier ...

Also in today's links: measuring carbon footprints, tree deaths and the impact of waste sludge. read more

... cell human trial ... Survey: Slow economy a pain for hospitals ... Study: Tree death-global warming tie found ... Japan launches greenhouse gas probe ... Health/Science news from UPI.

... fungus germinates in the tree tissue and can cause tree death. "This beetle is very small – roughly ... orchards and isolate and remove any infected trees as soon as they begin to show signs of wilting ...

... death rates accelerated. Because the region is so vast, even small ecological effects ... fuel emissions. But in 2005 this process was reversed. Tree death accelerated most where drought was strongest ...

... to changes in forest structure. Increases in tree density, smaller tree size and increased fuel ... burns and mechanical thinning increased the incidence of tree death from bark beetles and wood borers. ...