By Craig Hilton-Taylor
Release of the 2000 purple checklist is an immense landmark for IUCN. it's the first time that listings of animals and crops were mixed and the 1st time that the purple checklist has been produced on CD-ROM. The 2000 pink record combines new assessments‹including all fowl species, many antelope and bat species, so much primates and sharks, all Asian freshwater turtles, extra molluscs, and lots of others‹with these from past courses. the combo of animals and vegetation right into a unmarried record containing exams of greater than 18,000 taxa (11,000 of that are threatened species) and the circulation in the direction of enhanced documentation of every species at the record signifies that a hard-copy model of the pink record may run to numerous volumes. This, mixed with the truth that the pink checklist could be up-to-date every year, resulted in the choice to unlock the purple checklist in digital layout, through the realm large internet and as a CD-ROM.
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Additional info for 2000 IUCN red list of threatened species
As shown previously, a large proportion of these are considered to be threatened, (for example 69% of freshwater mussels (Master et al. 2000)), and the change in the total number of molluscs from the figure given by WCMC is due to the acceptance that many of these species are in fact now Extinct. These results are a clear indication of the extremely vulnerable nature of freshwater habitats and species occurring in these systems are likely to be facing a much higher risk of extinction than their counterparts in the terrestrial and marine environments.
Recording extinctions The SSC Red List Programme Office frequently receives requests to provide information on how many species have gone extinct in the last 100 years. It is extremely difficult to answer such requests because of the problems in recording contemporary extinction events. It is frequently stated that species are being lost every day, particularly invertebrates and other small cryptic organisms, which have not as yet been discovered or named. Even if they have been discovered and named, they are often too small to be noticed without special sampling procedures, or they occur in remote areas where 31 Red List 2000 06 September 2000 16:14:56 Color profile: Generic CMYK printer profile Composite Default screen 2000 IUCN Red List of Threatened Species regular monitoring is impossible.
E. an increase from 29 to 46 Endangered species and 13 to 19 Critically Endangered species. For the birds, the most significant changes have been in the Procellariformes (albatrosses and petrels) which have increased from 32 to 55 species (all 16 species of albatross are now listed as threatened whereas in 1996 there were only 3—this is due to the impact of longline fisheries) and the Sphenisciformes (penguins) which have doubled in number from five to ten. These increases reflect the increasing threats to the marine environment (BirdLife International 2000).