Mass Extinction Of Plants
And Animals Underway
Discovery News Brief
Most of the nation's biologists are convinced that a "mass extinction" of plants and animals is underway, posing a major threat to humans in the next century, yet most Americans are only dimly aware of the problem, a poll says.
The rapid disappearance of species was ranked as one of the planet's gravest environmental worries, surpassing pollution, global warming and the thinning of the ozone layer, according to the survey of 400 scientists commissioned by New York's American Museum of Natural History.
The poll's release Monday comes on the heels of a groundbreaking study of plant diversity that concluded at least one in eight known plant species is threatened with extinction. Many scientists believe that the rate of loss is greater now than at any time in history, according to today's Washington Post.
"The speed at which species are being lost is much faster than any we've seen in the past -- including those (extinctions) related to meteor collisions," says Daniel Simberloff, a University of Tennessee ecologist and prominent expert in biological diversity who participated in the museum's survey.
Most of his peers apparently agree. Nearly seven out of 10 of the biologists polled said they believed a "mass extinction" was underway, and an equal number predicted that up to one-fifth of all living species could disappear within 30 years. Nearly all attributed the losses to human activity, especially the destruction of plant and animal habitats.
Among the dissenters, some argue that there is not enough data to support that view. Many of the loss estimates are extrapolations based on the global destruction of rain forests and other rich habitats.
Among non-scientists, the subject appears to have made relatively little impression. Sixty percent of the laymen polled professed little or no familiarity with the concept of biological diversity, and barely half ranked species loss as a "major threat."
The scientists interviewed in the Louis Harris poll were members of the Washington-based American Institute of Biological Sciences, a professional society of more than 5,000 scientists, the Post says.

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