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Craig Hilton-Taylor, who manages the IUCN red list in Cambridge, said extinction estimates were often inadequate. "We are certainly underestimating the number of species that are in danger of becoming extinct because there are around 1.8m described species and we've only been able to assess 41,000 of those." The latest study could help refine models used to decide which species are put on the red list, he said. "We are constantly looking at how we evaluate extinction risk, and it may be they have hit on something that can help us." More than 16,000 species worldwide are threatened with extinction, according to a 2007 report from the IUCN. One in four mammal species, one in eight bird species and one in three amphibian species are on the organisation's red list. An updated list is due to be published in October.
Originally posted by ZeroSum
reply to post by Alaskan Man
The website is sponsered by BBC, I would't say it was pulled out of thin air
Here are a few recently exctict animls:
www.itsnature.org...
Heres an article from 2008 that might be interesting:
www.thegoodhuman.com...
Originally posted by Drunkenshrew
these numbers are made up. It is impossible to get very accurate statistics in these areas.
Originally posted by ZeroSum
6,195,480,130 Carbon dioxide (CO2) emissions this year, in tons
How can we sit idle by and watch the world die like this?
Originally posted by ZeroSum
I believe people need to be more aware of what is going on, then someone might help stop this exctinction.
Thanks for the article.
Although the extinction of various species is a natural phenomenon, the rate of extinction occurring in today's world is exceptional -- as many as 100 to1,000 times greater than normal, Dr. Donald A. Levin said in the January-February issue of American Scientist magazine. The co-author is Levin's son, Phillip S. Levin, a National Marine Fisheries Service biologist who is an expert on the demography of fish, especially salmon. Levin's column noted that on average, a distinct species of plant or animal becomes extinct every 20 minutes. Donald Levin, who works in the section of integrative biology in the College of Natural Sciences, said research shows the rate of current loss is highly unusual -- clearly qualifying the present period as one of the six great periods of mass extinction in the history of Earth.
I read a report, produced by World Wildlife Fund, the Zoological Society of London, and the Global Footprint Network, that says land species have declined by 25%, marine life by 28%, and freshwater species by 29% over the past 35 years.
The actual annual sum is only an educated guess, because no scientist believes that the tally of life ends at the 1.5 million species already discovered; estimates range as high as 100 million species on earth, with 10 million as the median guess. Bracketed between best- and worst-case scenarios, then, somewhere between 2.7 and 270 species are erased from existence every day. Including today.
In a 2004 analysis published in the journal Science, Lian Pin Koh and his colleagues predict that an initially modest co-extinction rate will climb alarmingly as host extinctions rise in the near future. Graphed out, the forecast mirrors the rising curve of an infectious disease, with the human species acting all the parts: the pathogen, the vector, the Typhoid Mary who refuses culpability, and, ultimately, one of up to 100 million victims.