Humans Fuel Worst Extinction Since End of Dinos...

http://www.livescience.com/environment/060320_diversity.html

Changes to Earth's biodiversity have occurred more rapidly in the past 50 years than at any time in human history, creating a species loss greater than anything since a major asteroid impact wiped out the dinosaurs.

That's the conclusion of Global Biodiversity Outlook 2, a report released today by the United Nation's Convention on Biological Diversity.

"In effect, we are currently responsible for the sixth major extinction event in the history of the Earth, and the greatest since the dinosaurs disappeared, 65 million years ago," the report states.

The wide-ranging report also states that demand for resources globally exceeds the biological capacity of the Earth by some 20 percent.

Among the findings:

The average abundance of species declined 40 percent between 1970 and 2000 while species in rivers, lakes and marshlands have declined by 50 percent.
Between 12 and 52 percent of species within well-studied higher taxa including birds, mammals and amphibians are threatened with extinction.
In the North Atlantic, populations of large fish have declined 66 percent in the last 50 years.
Since 2000, 6 million hectares of primary forest have been lost annually.
In the Caribbean, average hard coral cover declined from 10 to 50 percent in the last three decades.
35 percent of the world's mangroves have been lost in the last two decades.
"Two thirds of the services provided by nature to humankind are in decline, worldwide," said Ahmed Djoghlaf, Executive Secretary of the U.N.'s Convention on Biological Diversity, in an open letter to all of the planet's citizens. "Humans have made unprecedented changes to ecosystems in recent decades to meet growing demands for food and other ecosystems services."

What humans need

The report offers simple economic logic for maintaining biodiversity: "Biodiversity loss disrupts ecosystem functions, making ecosystems more vulnerable to shocks and disturbances, less resilient, and less able to supply humans with needed services."

Biodiversity loss has "weakened nature's ability to deliver its vital services," Djoghlaf writes. "Human activity is putting such strain on the natural functions of Earth that the ability of the planet's ecosystems to sustain future generations can no longer be taken for granted."

The report also makes this appeal: "Apart from nature's immediate usefulness to humankind, many would argue that every life form has an intrinsic right to exist, and deserves protection." It calls for reversing the trends of biodiversity loss by 2010. The convention initially set this goal up in 2002 but cautioned in the new report that little progress has been made.

"What is needed is a Global Alliance that brings governments, business, industry, non-governmental organizations, and the men, women, and youth of this world together in a common endeavor," Djoghlaf said.

One post and it's already W's fault.
Just cut to the chase...let the bashing begin!

Originally posted by xs
One post and it's already W's fault.
Just cut to the chase...let the bashing begin!

Originally posted by ChessJester
http://www.livescience.com/environment/060320_diversity.html

[quote]Changes to Earth's biodiversity have occurred more rapidly in the past 50 years than at any time in human history, creating a species loss greater than anything since a major asteroid impact wiped out the dinosaurs.

That's the conclusion of Global Biodiversity Outlook 2, a report r ...[text shortened]... ess_id=174 on how the bush administration is "rewriting the science".

Originally posted by bbi2
thats great, but everyone knows 1 person cant make a difference

Originally posted by ChessJester
http://www.livescience.com/environment/060320_diversity.html

[quote]Changes to Earth's biodiversity have occurred more rapidly in the past 50 years than at any time in human history, creating a species loss greater than anything since a major asteroid impact wiped out the dinosaurs.

That's the conclusion of Global Biodiversity Outlook 2, a report r ...[text shortened]... ess_id=174 on how the bush administration is "rewriting the science".

Originally posted by Rajk999
That first paragraph sounds like garbage. First, there no way anyone is sure how many species were in existance at the time of the dinosaurs... they can only guess. Secondly, scientist are not sure how many species are in existance today or more importantly, how many are lost .. those are guesses.

Originally posted by scottishinnz
yes, they are necessarily guesses. but diversity IS decreasing. Plenty of studies show that (by doing year on year estimates, or even estimates of tropical rainforest cover (which is the most species rich habitat on the planet)).

Unless you are suggesting that because we have imperfect knowledge we should just forget the entire thing and keep destroying the planet?

Originally posted by Rajk999
Many environmental scientists are drama queens and they tend to exaggerate. In the 1970s many of them had predicted that the world would suffocate in CO2 emissions by the year 2000, that there would be no trees left to produce paper etc etc. They were all wrong and will continue to be wrong ..... We are not going to all die or suffer because a few insignificant species did not make it

Originally posted by scottishinnz
oh, what about 10? or 100? or even 1000? One person is the only unit that CAN make a difference.