28 Feb 2013:
Earth Unlikely to Face
An Ecological Tipping Point, Study Says
A team of international scientists has rejected the idea that the planet could face a sudden and irreversible ecological shift as a result of largely human-driven pressures, suggesting that such global transformations are more likely to occur over a long period of time. While earlier studies have warned that ecological pressures — including climate change, biodiversity loss, and over-exploitation of resources — could drive the planet toward a dangerous “tipping point,” the new paper says the ecosystems of different continents are not sufficiently interconnected for such a global shift to occur
. And while as much as 80 percent of the biosphere includes ecosystems that have been affected by human activities, major ecological shifts driven by these human pressures “depend on local circumstances and will therefore differ between localities,” said Erle Ellis, a scientist at the University of Maryland, Baltimore County and co-author of the paper, published in the journal Trends in Ecology and Evolution
. This reality, the authors suggest, should encourage communities to pursue appropriate conservation solutions at local and regional levels rather than becoming distracted by projections of “doom and gloom” on a global scale.
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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.