IUCN Red List Overview and Criteria

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Questions and Answers

What characterizes a taxon that is classified as Near Threatened?

It qualifies as Critically Endangered or Endangered.

It is close to qualifying for a threatened category in the future. (correct)

It has abundant data available regarding its distribution.

It is widely distributed with a stable population.

Which category includes species that are widespread and abundant?

Least Concern (correct)

Near Threatened

Data Deficient

Critically Endangered

What does the Data Deficient category signify about a taxon?

Sufficient data exists for a thorough evaluation.

There is a clear understanding of its extinction risk.

It is automatically considered threatened.

There is inadequate information to assess its risk of extinction. (correct)

How many species were listed as critically endangered according to the 2004 IUCN Red List?

1376 species Signup and view all the answers

What does a Not Evaluated classification indicate about a taxon?

It has not been assessed against the established criteria. Signup and view all the answers

Which of the following accurately reflects the outcome of the 2004 IUCN Red List?

It included a comprehensive assessment of various taxa. Signup and view all the answers

Which group of species was NOT included in the threatened categories according to the 2004 IUCN Red List?

Not Evaluated species Signup and view all the answers

What is the significance of a taxon being classified as Critically Endangered?

It has a high risk of extinction in the wild. Signup and view all the answers

What percentage of amphibian species are currently threatened according to the 2012 IUCN assessment?

41% Signup and view all the answers

Which category of species had the highest number listed as threatened in the 2012 IUCN Red List?

Amphibians Signup and view all the answers

What is the total number of species assessed by the IUCN in 2012?

63837 Signup and view all the answers

Which of the following taxonomic groups does the Red List Index currently cover?

Amphibians Signup and view all the answers

What was the total number of species classified as Extinct in the wild in the 2012 IUCN Red List?

81 Signup and view all the answers

What was the primary purpose of the Red List Index (RLI)?

To measure extinction risk trends Signup and view all the answers

As of the update released on July 2, 2013, what is the total number of species listed as threatened with extinction?

20934 Signup and view all the answers

Which species group is noted to be moving toward extinction risk most rapidly?

Corals Signup and view all the answers

What is a key indicator under Criteria B for classifying a species as threatened?

Severely fragmented or existing at no more than ten locations. Signup and view all the answers

Which of the following best describes the outcome if a species has an estimated population of fewer than 1,000 mature individuals under Criteria D?

It is prone to become Critically Endangered or Extinct quickly due to human impacts. Signup and view all the answers

What does Criteria E focus on in terms of extinction risk assessment?

Quantitative analysis showing at least a 10% probability of extinction within 100 years. Signup and view all the answers

Under Criteria C, what is the required condition for a species with fewer than 10,000 mature individuals?

An estimated continuing decline of at least 10% within 10 years or three generations. Signup and view all the answers

What defines a species classified as Extinct (EX) according to the IUCN Red List?

No known individuals remain, and reasonable doubt exists about their survival. Signup and view all the answers

If a species' population is severely fragmented, what does this imply about its subpopulations?

All individuals are confined to one subpopulation. Signup and view all the answers

What is a common characteristic of a taxon that is facing a very small population under Criteria D?

The area of occupancy is typically less than 100 km2. Signup and view all the answers

What information does the IUCN Red List provide about biological species?

It includes conservation status and threats for various species worldwide. Signup and view all the answers

What is the main criteria for a taxon to be considered 'presumed extinct'?

Exhaustive surveys in known and/or expected habitats have failed to record an individual. Signup and view all the answers

Which statement accurately describes a taxon categorized as 'Extinct in Wild' (EW)?

It survives only in captivity or as a naturalized population outside its historic range. Signup and view all the answers

What does the classification 'Critically Endangered' imply about a taxon?

It meets specific criteria indicating an extremely high risk of extinction in the immediate future. Signup and view all the answers

How is a taxon classified as 'Endangered' (EN)?

It meets certain criteria indicating a very high risk of extinction in the wild. Signup and view all the answers

What is the meaning of 'Vulnerable' (VU) in conservation status?

It faces high risk of endangerment in the wild according to specific criteria. Signup and view all the answers

What does the term 'Near Threatened' (NT) signify?

It is on the verge of becoming endangered in the near future. Signup and view all the answers

Why is the timing of surveys crucial in determining a taxon's conservation status?

Surveys must align with the taxon’s reproductive cycles and behaviors to ensure accurate data. Signup and view all the answers

Which of the following is a key factor when assessing whether a taxon is considered extinct?

Surveys should cover a comprehensive time frame appropriate to the taxon’s life cycles. Signup and view all the answers

What is primarily responsible for the high biodiversity in India?

Physical features and climatic conditions Signup and view all the answers

Which of the following is NOT one of the biodiversity hotspots found in India?

Sundarbans Signup and view all the answers

How many species were on the IUCN Red List in India as of 2015?

988 species Signup and view all the answers

What is a significant threat to biodiversity highlighted in the content?

Deforestation and commercial plantation Signup and view all the answers

Which of the following species is endemic to India?

Malabar Civet Signup and view all the answers

In what year did India become a State Member of IUCN?

1969 Signup and view all the answers

Where is the Namdapha Flying Squirrel primarily found?

Namdapha Tiger Reserve Signup and view all the answers

What main habitat do the Kondana Rat primarily inhabit?

Tropical and subtropical dry deciduous forests Signup and view all the answers

Study Notes

IUCN Red List

The IUCN Red List of Threatened Species was created in 1964.
The IUCN Red list categorizes species into nine groups based on extinction risk.
The categories, from most to least threatened, are Extinct, Extinct in the Wild, Critically Endangered, Endangered, Vulnerable, Near Threatened, Least Concern, Data Deficient, and Not Evaluated.

Criteria for Assessing Extinction Risk

Criteria A: Species with a small geographic distribution, fragmented populations, and/or declining population size.
Criteria B: Species with a small geographic distribution and/or declining population size.
Criteria C: Species with a small population size and/or declining population size.
Criteria D: Species with a small population size and/or restricted distribution.
Criteria E: Species with a high probability of extinction within 100 years.

Status of Threatened Species 2004-2012

In 2004, 15,589 species were listed as threatened on the IUCN Red List.
As of 2012, 20,934 species were classified as threatened.
Amphibians, reef-building corals, mammals, birds, and conifers are particularly at risk.

The Red List Index (RLI)

The RLI is an indicator of the changing state of global biodiversity.
It measures the trend in extinction risk over time for different species groups.
Coral species are declining most rapidly, while amphibians are the most threatened group on average.

IUCN and India

India became a member of the IUCN in 1969.
The IUCN India Country Office was established in 2007.
India is recognized for its mega-diversity, with 45,000 plant species and 91,000 animal species.
Four biodiversity hotspots are found in India: the Himalayas, the Western Ghats, the North-East, and the Nicobar Islands.

IUCN Red List and India

In 2015, 988 species from India were listed on the IUCN Red List.
Some threatened species from India include the Himalayan Red and Brown Bear, Pygmy Hog, Kondana Rat, Namdapha Flying Squirrel, Malabar Civet, Kashmir Hangul, and the Red Panda.

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Description

Explore the IUCN Red List of Threatened Species, created in 1964, which categorizes species based on their extinction risk. Learn about the nine groups used for classification, as well as the criteria for assessing the risk of extinction. Test your knowledge on the status of threatened species from 2004 to 2012.