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Saturday, November 7, 2009

Species' extinction threat grows

More than a third of species assessed in a major international biodiversity study are threatened with extinction, scientists have warned.

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The Kihansi spray toad is now considered to be extinct in the wild.

Out of the 47,677 species in the IUCN Red List of Threatened Species, 17,291 were deemed to be at serious risk.

These included 21% of all known mammals, 30% of amphibians, 70% of plants and 35% of invertebrates.

Conservationists warned that not enough was being done to tackle the main threats, such as habitat loss.

The Red List, regarded as the most authoritative assessment of the state of the planet's species, draws on the work of thousands of scientists around the globe.

The latest update lists amphibians as the most seriously affected group of organisms on the planet, with 1,895 of the 6,285 known species listed as threatened.

Of these, it lists 39 species as either "extinct" or "extinct in the wild". A further 484 are deemed "critically endangered", 754 "endangered" and 657 "vulnerable".

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