Biodiversity: Life Ââ a status report
Species are disappearing quickly â but researchers are struggling to assess how bad the problem is.
Of all the species that have populated Earth at some time over the past 3.5 billion years, more than 95% have vanished â many of them in spectacular die-offs called mass extinctions. On that much, researchers can generally agree. Yet when it comes to taking stock of how much life exists today â and how quickly it will vanish in the future â uncertainty prevails.
Studies that try to tally the number of species of animals, plants and fungi alive right now produce estimates that swing from less than 2 million to more than 50 million. The problem is that researchers have so far sampled only a sliver of Earthâs biodiversity, and most of the unknown groups inhabit small regions of the world, often in habitats that are rapidly being destroyed.
Article Source: http://www.nature.com/news/biodiversity-life-a-status-report-1.16523




