2000 IUCN red list of threatened species by Craig Hilton-Taylor

By Craig Hilton-Taylor

Release of the 2000 crimson record is an important landmark for IUCN. it's the first time that listings of animals and vegetation were mixed and the 1st time that the purple checklist has been produced on CD-ROM. The 2000 purple record combines new assessments‹including all chook species, many antelope and bat species, such a lot primates and sharks, all Asian freshwater turtles, extra molluscs, and plenty of others‹with these from prior courses. the combo of animals and crops right into a unmarried record containing checks of greater than 18,000 taxa (11,000 of that are threatened species) and the movement in the direction of more desirable documentation of every species at the record signifies that a hard-copy model of the purple checklist may run to numerous volumes. This, mixed with the truth that the crimson record might be up-to-date every year, ended in the choice to unencumber the purple checklist in digital layout, through the realm huge net and as a CD-ROM.

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2000). Similarly, the histogram for the molluscs is a classic guide to where malacologists are based or have been working and is a tribute to the excellent work done by many SSC Mollusc Specialist Group (MSG) members. Although the sequences of countries and numbers of threatened species are very incomplete, Figure 7 identifies a number of countries with significantly high numbers of threatened species, 22 Red List 2000 06 September 2000 16:14:50 Color profile: Generic CMYK printer profile Composite Default screen Analysis especially in the reptiles and amphibians.

This threat appears to have less impact on mammals, affecting only 69 species (10% of all). The extinction of most bird species since 1800, especially those on islands, is largely attributed to the introduction of alien invasive species (BirdLife International 2000). Therefore it is alarming to note that 30% of threatened birds are currently being affected by invasive species. 28 Red List 2000 06 September 2000 16:14:55 Color profile: Generic CMYK printer profile Composite Default screen Analysis Habitat loss/Degradation Direct loss/Exploitation Indirect loss Alien invasive species Natural disaster Atmospheric pollution Land/Water pollution Birds Mammals Plants Intrinsic factors 0 20 40 60 80 Percentage of threatened species Direct loss/exploitation Habitat loss/degradation Figure 9.

Likewise it is very difficult to predict with any certainty how many species, let alone which ones, will become extinct in the next one hundred years. These problems are further illustrated by the occasional rediscovery of species thought to be Extinct. The Vietnamese Warty Pig Sus bucculentus, was described from two skulls in the late 1800s, as the species was not subsequently recorded in any surveys it was treated as possibly extinct in the 1994 IUCN Red List and finally as Extinct in 1996. In 1997, a report was published indicating that the species still existed based on the identification of a partial fresh skull, which was obtained from some hunters (Groves et al.

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