Experts find multiple threats and many extinctions
In the April, 2004, issue of BioScience, a team of 16 experts from around the world report on the diversity and plight of what may be the worlds most endangered group of animals – nonmarine mollusks (that is, terrestrial and freshwater mollusks). The World Conservation Union lists in the IUCN Red List of Threatened Species a total of 1,930 threatened nonmarine mollusks, which is nearly half the number of all known amphibian species, more than twice the number of shark and ray species, and nearly seven times the number of turtle species.
Furthermore, nonmarine mollusks have the dubious honor of having the highest number of documented extinctions of any major taxonomic group. A staggering 42% of the 693 recorded extinctions of all animal species since the year 1500 are mollusks (260 gastropods and 31 bivalves).
Donna Royston | EurekAlert!
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