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The number of tree species on Earth

One of the most fundamental questions in ecology is how many species inhabit the Earth. However, due to massive logistical and financial challenges and taxonomic difficulties connected to the species concept definition, the global numbers of species, including those of important and well-studied life forms such as trees, still remain largely unknown. Here, based on global ground sourced data, we estimate the total tree species richness at global, continental, and biome levels.

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Western Sydney University researchers have contributed to a world-first study that estimates there are 73,000 tree species on Earth, including about 9,200 species yet to be discovered, of which 1,500 species are likely to be concentrated in northeast Australia and the Pacific Islands.

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A University of Guam review of published research on the critically endangered Serianthes nelsonii tree has revealed a reason why the population of the trees continues to be endangered despite a long history of funded conservation projects and a national recovery plan implemented 26 year

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Tubi is a rare tree species found only in two provinces in the Solomons group: Isabel, where Korona is; and Choiseul, to the country’s west...For the people of Isabel, Tubi is a tree of significant value that holds a special place in their culture and belief system...Locals referred to it as the