By Craig Hilton-Taylor
Release of the 2000 purple record is an important landmark for IUCN. it's the first time that listings of animals and crops were mixed and the 1st time that the crimson checklist has been produced on CD-ROM. The 2000 purple checklist 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 past guides. the mix of animals and crops right into a unmarried checklist containing tests of greater than 18,000 taxa (11,000 of that are threatened species) and the movement in the direction of stronger documentation of every species at the checklist implies that a hard-copy model of the pink checklist might run to a number of volumes. This, mixed with the truth that the crimson record could be up-to-date every year, resulted in the choice to unlock the pink record in digital layout, through the area vast net and as a CD-ROM.
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Additional info for 2000 IUCN red list of threatened species
This is primarily due to biases in the data set. Very few plant species in either of these countries have been assessed using the 1994 IUCN Red List Categories. In terms of the top 20 countries, Malaysia has by far the most threatened species with an extremely high total of 681 species, of which a large proportion are dipterocarp trees which are highly sought after by logging companies. This is followed by Indonesia, Brazil and Sri Lanka with 384, 338, and 280 threatened species respectively. As none of the floras of any of these countries have been comprehensively assessed it is not realistic to present this information as percentages of the total flora.
As stated previously, the only group to be comprehensively assessed, are the conifers, and although 16% of these are threatened, any extrapolation of these trends to other species could be misleading. However, this high proportion of threatened species is confirmed by the results of the TNC analysis (Master et al. 2000) which indicates 24% of USA conifers to be threatened. Similarly the 1997 IUCN Red List of Threatened Plants (Walter and Gillett 1998) lists 30% of conifers in the old Endangered (E) and Vulnerable (V) categories.
New survey information now confirms the extinction of these species, an event, which probably took place during the 1930s when rivers and springs were heavily impacted in the eastern USA. Other changes in numbers are also a result of the clarification of taxonomy and the removal of a number of duplicate entries from the Red List (these were mainly in the lower categories, especially Data Deficient). The status of plants A major difference between the 1996 and the 2000 Red Lists is the inclusion of plant species, which have been assessed using the 1994 IUCN Red List Criteria.
2000 IUCN red list of threatened species by Craig Hilton-Taylor