A massive global collaboration helped scientists figure out how many kinds of trees are on the planet, and how many are still unidentified.
Trillions of trees are growing on Earth, though how many kinds there are has been underestimated, a new study finds.— about 14 percent more than previously thought — a global collaboration of researchers reports in the Feb. 8More than a third of the 9,200 undiscovered species are probably rare and hiding out in South America’s biodiversity hot spots, such as the Amazon and tropical Andes, biologist Roberto Cazzolla Gatti of the University of Bologna in Italy and colleagues say.
To estimate the number of Earth’s existing tree species, the team analyzed global forest data from two databases — the Global Forest Biodiversity Initiative and TREECHANGE. The researchers used a statistical analysis to account for the number of rare, infrequent trees that could be overlooked, revealing the new difference between documented species and novel ones.
If more than 9,000 types of stationary, comparatively massive trees remain undetected, Cazzolla Gatti says, then the number of much smaller and more mobile animal species that are still unknown must be even greater.
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