By Craig Hilton-Taylor
Release of the 2000 pink checklist is an enormous 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 pink checklist combines new assessments‹including all chook species, many antelope and bat species, so much primates and sharks, all Asian freshwater turtles, extra molluscs, and lots of others‹with these from earlier courses. the mix of animals and vegetation right into a unmarried record containing tests of greater than 18,000 taxa (11,000 of that are threatened species) and the movement in the direction of more suitable documentation of every species at the record implies that a hard-copy model of the pink checklist could run to a number of volumes. This, mixed with the truth that the pink record can be up to date every year, ended in the choice to unencumber the purple checklist in digital structure, through the realm broad internet and as a CD-ROM.
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Additional info for 2000 IUCN red list of threatened species
Another example, is a species of rice rat Nesoryzomys fernandinae, found on the Galápagos island of Fernandina. Although only described in 1980, this species was listed as Extinct in 1996 because no living specimens had been collected. Thorough field surveys of the islands have since shown that N. fernandinae still exists, although it is threatened as a result of the introduction of the alien black rat Rattus rattus, a species responsible for the extinction of a number of other native rodent species in the Galápagos (Dowler et al.
Although the name IUCN Red List of Threatened Species implies that the primary focus is at the species level, the 2000 Red List also includes all assessments that have been made at the infra-specific and sub-population levels. The analysis of the 2000 Red List has focussed only at the species level, but Table 7 has been included as any indication of the growing number of infra-specific and subpopulation listings. The 2000 Red List includes 1,769 infra-specific taxa and sub-populations, of which 1,237 are listed in the threatened categories (524 vertebrates and 638 plants) and 52 are Extinct or Extinct in the Wild.
But using the information from the levels lower down in the hierarchical system, two key threats to mammals are fragmentation (6% of all species) and deforestation (9% of all species) both of which are due to unspecified causes. Clearly, when the threats to mammals are better documented, it is likely that the causes of habitat loss will be more comprehensively attributed to agricultural activities, extraction and development, thus possibly leading to results that are more similar to those for birds and plants.