By Craig Hilton-Taylor
Release of the 2000 crimson 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 pink checklist has been produced on CD-ROM. The 2000 crimson record combines new assessments‹including all chicken 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 mix of animals and crops right into a unmarried record containing tests of greater than 18,000 taxa (11,000 of that are threatened species) and the flow in the direction of more advantageous documentation of every species at the checklist signifies that a hard-copy model of the crimson record could run to numerous volumes. This, mixed with the truth that the crimson record should be up-to-date every year, ended in the choice to unencumber the crimson checklist in digital layout, through the area vast internet and as a CD-ROM.
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This is partly confirmed by the analysis of threats in the USA by Wilcove et al. (2000), which found that for threatened freshwater organisms, pollution was the second most important threat after habitat loss. Threatened subspecies and sub-populations Countless species, although not yet globally threatened, now exist in reduced numbers as highly fragmented and isolated sub-populations, and many of these sub-populations are threatened with extinction. Frequently these sub-populations are accorded taxonomic recognition in that they are named as subspecies or, in the case of many plants, as varieties.
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.
Other Worms Velvet Worms 0 0 0 13 2 2 0 1 0 Inland Water 1946 31 78 111 131 627 0 409 125 420 0 0 0 0 14 Terrestrial 9256 1111 1144 283 143 0 11 0 438 508 0 0 6 5 5607 Insects Plants Nemertine Worms 163 Molluscs 0 Fishes 9 Reptiles 105 Birds 25 Mammals 320 Marine Total Corals & Anemones Crustaceans Spiders & Centipedes Numbers of threatened species in three major biomes Amphibians Biome Type Table 6. Note: The counts are only for globally threatened species (CR, EN, VU). g. sturgeon) are inland water and marine, etc.
2000 IUCN red list of threatened species by Craig Hilton-Taylor