By Craig Hilton-Taylor
Release of the 2000 purple record is a tremendous landmark for IUCN. it's the first time that listings of animals and vegetation were mixed and the 1st time that the pink checklist has been produced on CD-ROM. The 2000 purple 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 plenty of others‹with these from past guides. the combo of animals and crops right into a unmarried checklist containing exams of greater than 18,000 taxa (11,000 of that are threatened species) and the flow in the direction of greater documentation of every species at the checklist signifies that a hard-copy model of the purple record might run to a number of volumes. This, mixed with the truth that the crimson checklist can be up-to-date every year, resulted in the choice to unlock the purple record in digital structure, through the realm broad net and as a CD-ROM.
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Extra resources for 2000 IUCN red list of threatened species
Distribution of threatened species by biomes From the taxonomic groups included on the Red List it has been assumed that the preponderance of species would be terrestrial, especially since very little is known about the population status of most aquatic organisms. An attempt has been made to code the presence of all threatened species according to their occurrence in the three major biomes – terrestrial, inland waters and marine (Table 6). Where large numbers of aquatic species have been assessed, the proportion of threatened species rises markedly.
After the top six categories, the habitat preferences for threatened birds and mammals diverge markedly. It appears that birds are more adaptable and are able to survive more readily in highly transformed habitats such as plantations, agricultural lands and urban areas. Mammals on the other hand (at least those sampled) appear to be far less tolerant of such transformed habitats and disturbance, and none of these types of habitat feature in the top 20. Wetlands and other freshwater aquatic habitats are important for a small number of threatened birds and mammals.
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).