Protecting 17% of earth's land could save two-thirds of plant species

Duke University News: Protecting key regions that comprise just 17 percent of Earth’s land may help preserve more than two-thirds of its plant species, according to a new Duke University-led study by an international team of scientists.

The researchers from Duke, North Carolina State University and Microsoft Research used computer algorithms to identify the smallest set of regions worldwide that could contain the largest numbers of plant species. They published their findings today in the journal Science.

“Our analysis shows that two of the most ambitious goals set forth by the 2010 Convention on Biological Diversity -- to protect 60 percent of Earth’s plant species and 17 percent of its land surface -- can be achieved, with one major caveat,” said Stuart L. Pimm, Doris Duke Professor of Conservation Ecology at Duke’s Nicholas School of the Environment.

“To achieve these goals, we need to protect more land, on average, than we currently do, and much more in key places such as Madagascar, New Guinea and Ecuador,” Pimm said. “Our study identifies regions of importance. The logical -- and very challenging -- next step will be to make tactical local decisions within those regions to secure the most critical land for conservation.”

Plant species aren’t haphazardly distributed across the planet. Certain areas, including Central America, the Caribbean, the Northern Andes and regions in Africa and Asia have much higher concentrations of endemic species, that is, those which are found nowhere else.

“Species endemic to small geographical ranges are at a much higher risk of being threatened or endangered than those with large ranges," said Lucas N. Joppa, a conservation scientist at Microsoft Research’s Computational Science Laboratory in Cambridge, U.K. "We combined regions to maximize the numbers of species in the minimal area. With that information, we can more accurately evaluate each region’s relative importance for conservation, and assess international priorities accordingly.”...

A rainbow eucalyptus in New Guinea, shot by Jeff Kubina, Wikimedia Commons via Flickr, under the Creative Commons Attribution-Share Alike 2.0 Generic license