Climate Change and Fires Replace Forests with Weeds
GR: Climate-change droughts are killing trees and shrubs in dry lands around the world. For many years, forest ecologists argued that some vegetation requires periodic fires to stay healthy. The fires clear out underbrush and open areas where trees are tightly packed.
As climate change advances, the ‘let it burn’ philosophy has taken on a new meaning. Across the western U. S. and other drying regions, trees are dying. Human-caused climate change with fire as its agent, is sweeping away the forests and shrublands. Fire-prone weeds are taking their place. Weedlands, sometimes called ‘annual grasslands’ have lower biodiversity, productivity, and ability to absorb heavy rains. The process is known as desertification. Today, firefighters have little choice but to ‘let it burn,’ Perhaps they are unconsciously aware that the magnificent conifer forests of the world will never return.
“Since 2010, more than one hundred million trees have died in California. Falling trees and limbs are not the only hazard. These dead trees could provide the fuel to turn a normal wildfire into an inferno.
“Fire is as much a part of California as mudslides and winter snowpack.
“Van Mantgem: “The Sierras are always going to burn. So we’re never going to be able to exclude fire – and I don’t think we’d want to exclude fire – it’s a fire-adapted system.”
“That’s Phil Van Mantgem, with the U.S.G.S. Western Ecological Research Center. He says that although fire is a natural part of the system, the long-term drought has made it more likely that wildfires will burn out of control. But there’s no easy solution.” –Bruce Lieberman (Dead trees stoke wildfire fears » Yale Climate Connections)