Sixth mass extinction has begun: Study

“We emphasise that our calculations very likely underestimate the severity of the extinction crisis, because our aim was to place a realistic lower bound on humanity’s impact on biodiversity,” the researchers wrote.

– We wander through our cities, each trapped in his or her little local world with no idea that the aggregate of all of us is destroying the planet’s ecosphere.  And how are we to know when those we trust to lead us sell our interests and the interests of our children and other species for momentary wealth.  They sell all the future generations and indeed a planet full of billions of years of biodiversity, they sell it all so that they can have ‘the better things’ in their small local dream of what their life’s about. Where are the leaders who truly lead and look out for the long and short term good of all of us?  Without them, we are doomed.  This beautiful world we are looking at is beginning to fade under our aggregate assault and most of us have no idea.

– dennis

New York, June 20 (IANS) The world is witnessing the sixth mass extinction that threatens even our very own existence, warns a new study.

The new study, published in the journal Science Advances, shows that even with extremely conservative estimates, species are disappearing up to about 100 times faster than the normal rate.

The world has seen five recognisable mass extinctions till now and the final one wiped out the dinosaurs 66 million years ago.

“(The study) shows without any significant doubt that we are now entering the sixth great mass extinction event,” said Paul Ehrlich, senior fellow at the Stanford Woods Institute for the Environment.

The researchers have warned that humans could be among the species lost as a result of the current mass extinction event.

“If it is allowed to continue, life would take many millions of years to recover, and our species itself would likely disappear early on,” said lead author Gerardo Ceballos from the Universidad Autonoma de Mexico.

There is general agreement among scientists that extinction rates have reached unparalleled levels since the dinosaurs died out 66 million years ago.

However, some have challenged the theory, believing earlier estimates rested on assumptions that overestimated the crisis.

Using fossil records and extinction counts from a range of records, the researchers compared a highly conservative estimate of current extinctions with a normal “background” rate estimate twice as high as those widely used in previous analyses.

This way, they brought the two estimates – current extinction rate and average background or going-on-all-the-time extinction rate – as close to each other as possible.

“We emphasise that our calculations very likely underestimate the severity of the extinction crisis, because our aim was to place a realistic lower bound on humanity’s impact on biodiversity,” the researchers wrote.

Now, the specter of extinction hangs over about 41 percent of all amphibian species and 26 percent of all mammals, according to the International Union for Conservation of Nature, which maintains an authoritative list of threatened and extinct species.

“There are examples of species all over the world that are essentially the walking dead,” Ehrlich said.

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