More than 500 terrestrial vertebrate species – birds, amphibians, mammals, reptiles – are on the brink of a worldwide extinction emergency. These are animal species with surviving populations of fewer than 1,000 individuals. They are to be found in tropical and subtropical regions and, significantly, they are concentrated in regions heavily affected by human activities. Extinction is a natural part of the evolutionary process. But the number of simultaneously threatened species, and the link to direct human pressure, adds support for the argument that humanity is now witnessing the sixth, and possibly greatest, mass extinction in the history of life. The same research has identified 388 vertebrate species with fewer than 5000 individuals in the surviving populations. Of these, more than four-fifths cling to survival in the same threatened regions, and may therefore also be heading for the brink of extinction.
Climate News Network 8th June 2020 read more »