2015-11-20. Half of all tree species in Amazon 'face extinction'.

posted Nov 25, 2015, 9:11 AM by Alan Gould
By Helen Briggs, BBC News. For GSS A New World View chapter 5. Excerpt: ...According to new data, up to 57% of all Amazonian trees may already fit the criteria of being globally threatened. ...Forest cover in the Amazon has been shrinking for decades, but little is known about the impact on individual plant species. The trees at risk include iconic species like the Brazil nut tree, food crops such as cacao, the source of chocolate, as well as rare trees that are almost unknown to science. The research, published in the journal, Science Advances, compared data from almost 1,500 forest plots with maps of current and predicted forest loss to estimate how many tree species have been lost and how many are likely to disappear by the middle of the century. ...It found that the Amazon - the world's most diverse forest - could be home to more than 15,000 tree species. Of these, between 36% and 57% are likely to qualify as being globally threatened under the IUCN Red List of Threatened Species criteria....  http://www.bbc.com/news/science-environment-34880656