■ IUCN Red List of Threatened Species
✅Recently, the International Union for Conservation of Nature (IUCN) has released its latest Red List of Threatened Species.
● Key facts:
✅Some 902 species are officially extinct.
✅30 percent of the species (38,543) that it assessed (138,374) face the threat of extinction.
✅Some 80 species are extinct in the wild, 8,404 are critically endangered, 14,647 are endangered, 15,492 are vulnerable and 8,127 are near threatened.
✅Some 71,148 species are of least concern, while 19,404 are data deficient.
● Important Species mentioned in the report:
✅The Atlantic bluefin tuna (Thunnus thynnus) moved from endangered to least concern while the Southern bluefin tuna (Thunnus maccoyii) moved from critically endangered to endangered.
✅The world’s largest living lizard, the Komodo dragon (Varanus komodoensis), has been moved from vulnerable to endangered.
✅The species is endemic to Indonesia and occurs only in the World Heritage-listed Komodo National Park and neighbouring Flores.
● What is the IUCN red list of threatened species?
✅It is the world’s most comprehensive inventory of the global conservation status of plant and animal species.
● How are species categorised?
✅It uses a set of quantitative criteria to evaluate the extinction risk of thousands of species.
● The IUCN Red List Categories:
✅The IUCN Red List Categories define the extinction risk of species assessed. Nine categories extend from NE (Not Evaluated) to EX (Extinct).
✅Critically Endangered (CR), Endangered (EN) and Vulnerable (VU) species are considered to be threatened with extinction.
IUCN use terms like “threatened”
Critically Endangered (CR), Endangered (EN) and Vulnerable (VU) .
What does each category mean ?
In descending order of threat, the IUCN Red List threat categories are as follows:
1. Extinct or Extinct in the Wild: This means that the species are no longer available in the wild
2. Critically Endangered, Endangered and Vulnerable:* species threatened with global extinction.
3. Near Threatened:* species close to the threatened thresholds or that would be threatened without ongoing conservation measures.
4. Least Concern:* species evaluated with a lower risk of extinction.
5. Data Deficient:* no assessment because of insufficient data.
● Utility of the red list:
✅It brings into focus the ongoing decline of Earth’s biodiversity and the influence humans have on life on the planet. It provides a globally accepted standard with which to measure the conservation status of species over time.
✅Scientists can analyze the percentage of species in a given category and how these percentages change over time; they can also analyze the threats and conservation measures that underpin the observed trends.
SOURCE – DOWN TO EARTH