19 Dec 2012:
Climate Already Altering
Ecosystems and Biodiversity, Report Says
Climate change is causing plant and animal species across the U.S. to shift their geographic ranges and life events — from flowering to migration — are being transformed at a faster rate than observed even a few years ago, a new analysis by 60 scientists says. According to the report, “Climate Change on Biodiversity, Ecosystems, and Ecosystem Services
,” some terrestrial species are moving up in elevation at rates 2 to 3 times greater than previously believed, while the range shifts for some marine species have been even greater. These rapid changes in ranges, distributions, and life cycles are forcing species to interact in ways that they never have before and could alter the timing and availability of natural resources critical to biodiversity and ecosystem health. “These geographic range and timing changes are causing cascading effects that extend through ecosystems... creating mismatches between animals and their food sources,” said Nancy Grimm, a scientist at Arizona State University and lead author of the report. According to the report, which was also led by researchers from the U.S. Geological Survey and the National Wildlife Federation, there is evidence that climate change is responsible for population declines and increased extinction risks for some species. Increasingly mild winters are also profoundly altering ecosystems, leading to outbreaks of pests that have killed large areas of forest in the U.S. West, the report said.
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A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast. Watch the video.
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An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
Watch the video.
Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.