The IUCN Red List of Threatened Species founded in , has evolved to become the world's The Red List of was released 19 July at Rio+20 Earth Summit; nearly 2, species were added, with 4 species to the extinct list, 2 to the . Hilton-Taylor, C. A history of the IUCN DATA Book and Redlist . According to the Red Data List of International Union for Conservation of Nature ( IUCN), there The Red List of was released at the Rio+20 Earth Summit. It contains . Print/export. Create a book · Download as PDF · Printable version. Help us make The IUCN Red List a more complete barometer of life. It divides species into nine categories: Not Evaluated, Data Deficient, Least Concern.
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Data for species that are genuinely changing status are used to calculate the Red . Table 7 () - Species changing IUCN Red List Category between. Book · January with 6, Reads groups in Sri Lanka that are excluded from this text due to lack of clear data on their current status. Red Data Book of Endangered Vascular Plants in Korea (in Korean). Posted on Apr 12, Asia and the Middle East, Criteria System, IUCN Categories.
Tropicultura — Guinko, S. Hengl, T. Heubach, K. Ecological Economics — Journal of Biogeography — Journal of Arid Environments 48— Contribution of working group I to the fourth assessment report of the intergovernmental panel on climate change. Version 3. Version Retrieved from: w ww. Version 4.
PhD thesis, University of Frankfurt, pp. Krohmer, J.
Liu, C. Ecography 3: — Conservation Biology — Global Ecology and Biogeography — Check List 4: — Methods in Ecology and Evolution 5: — Royal Botanic Gardens, Kew, pp.
Check List 7: 85— Phillips, S. There is an emphasis on the acceptability of applying any criteria in the absence of high quality data including suspicion and potential future threats, "so long as these can reasonably be supported.
In the framework, Near Threatened and Least Concern became their own categories, while Conservation Dependent was removed and its contents merged into Near Threatened. Spix's macaw. There have been a number of versions, dating from , including: For plants, the Red List is the most important source. In , the IUCN Red List received criticism on the grounds of secrecy or at least poor documentation surrounding the sources of its data.
The list is also open to petitions against its classifications, on the basis of documentation or criteria. It has been suggested that the IUCN Red List and similar works are prone to misuse by governments and other groups that draw possibly inappropriate conclusions on the state of the environment or to effect exploitation of natural resources.
From Wikipedia, the free encyclopedia. An Unnatural History nonfiction book Wildlife conservation. International Union for Conservation of Nature. Archived from the original on 30 June Retrieved 20 June CS1 maint: The Guardian. Retrieved 14 February Archived from the original on 27 June Retrieved 11 October Retrieved 13 November Nearly 2, species added".
Archived from the original on 4 March Retrieved 14 November Sudhi 21 June Butchart; et al.
Table 7 shows the list of species that have changed category, along with the reasons for these changes. In addition to species changing status, The IUCN Red List grows larger with each update as newly described species and species from the less well-known groups are assessed for the first time Figure 1.
IUCN and its partners are working to expand the number of taxonomic groups that have full and complete Red List assessments in order to improve our knowledge of the status of the world's biodiversity; see the Barometer of Life page for more information about this work. Figure 1. Not all taxonomic groups have been completely assessed see Table 1 and Figure 2. It is very important to consider this when looking at the numbers of species in each Red List Category and the proportions of threatened species within each group; although The IUCN Red List gives a good snapshot of the current status of species, it should not be interpreted as a full and complete assessment of the world's biodiversity.
For many of the incompletely evaluated groups, assessment efforts have focused on those species that are likely to be threatened; therefore any percentage of threatened species reported for these groups would be heavily biased i. For those groups that have been comprehensively evaluated, the proportion of threatened species can be calculated, but the number of threatened species is often uncertain because it is not known whether DD species are actually threatened or not.
Some taxonomic groups are much better known that others i. Other, less well known groups have a large proportion of DD species, which brings uncertainty into the estimate for proportion of threatened species. To account for the issues raised above, proportion of threatened species is only reported for the more completely evaluated groups i.
Also, the reported percentage of threatened species for each group is presented as a best estimate within a range of possible values bounded by lower and upper estimates:. However, overall figures for numbers of species currently assessed in each Red List Category, along with an indication of which groups have been more comprehensively evaluated, can be found in the Summary Statistics Tables. An overview of proportions of threatened species within each of the more comprehensively assessed groups is shown in Figure 2.
Note that this bar chart groups comprehensively assessed groups of species into classes, with the exception of reef-forming corals which is an ecosystem-based group that includes species from two separate classes: Anthozoa and Hydrozoa. Only groups containing at least species are shown in Figure 2. Figure 2. The proportion of extant i.
Version assessed in each category for the more comprehensively assessed i. Species are grouped into classes with the exception of reef-forming corals, which includes species from classes Hydrozoa and Anthozoa , and are ordered according to the vertical red lines, which indicate the best estimate for proportion of extant species considered threatened CR, EN, or VU.
Best estimates of percentage threatened species with lower and upper estimates for each group are: The numbers to the right of each bar represent the total number of extant species assessed for each group. Tables 1 and 2 are organized by taxonomic group and show numbers of threatened species listed in the current version of The IUCN Red List in relation to the estimated number of described species Table 1a , and numbers of threatened species in each version of The IUCN Red List since Tables 1b and 2.
These tables highlight the disparity between the number of described species and the number of species that have been assessed. Table 1a - Number of species evaluated in relation to the overall number of described species, and numbers of threatened species by major groups of organisms. Table 1b - Numbers of threatened species by major groups of organisms —