New, highly detailed maps now reveal the state of the world’s wilderness, both on land and at sea, and the picture looks bleak.
In a series of recent studies, a group of researchers led by ecologist James Watson of the Wildlife Conservation Society and Australia’s University of Queensland analyzed the surface of Earth for significant human activity, such as roads and railways, pastures and farmland, and population centers, at a resolution of 1 square kilometer (0.4 square miles). In the oceans, they looked at fishing efforts as well as fertilizer effluent and shipping lanes.
The results are staggering, as summarized Oct. 31 in the journal Nature: Just 13 percent of the world’s oceans lack signs of human activity. And the figures on land aren’t much higher: not counting Antarctica, just 23 percent of terrestrial wilderness remains. But hidden in what Watson called a “horror story” for untouched places is the potential to save what’s left and, with it, life on Earth.
“Science is clearly showing that large intact places are the best low-hanging fruit that we should go and conserve,” Watson told Mongabay.
Early on in the research, a 2016 study comparing those changes with the pace of population and economic growth indicated that we weren’t losing wilderness as quickly as might be expected. Those “encouraging” results suggested that, as a species, we humans were using resources more efficiently, the researchers said.
But as the scientists dug deeper into the data, producing maps that looked at how well parks and reserves safeguard biodiversity and wild spaces from human impacts and the extent of humanity’s reach in the world’s oceans, for example, Watson said the story that emerged was “how little is left.” [Continue reading…]