A least-concern species is one that the International Union for Conservation of Nature (IUCN) has classified as not being a priority for species conservation because the species is still abundant in the wild. They are not threatened, near threatened, or (prior to 2001) conservation dependent. The moose (Alces alces) is an example of a species of low concern. Species cannot be designated as "Least Concern" unless their population status has been assessed. In this article, we will discuss Least Concern (LC) which will be helpful for UPSC exam preparation.

What is Least Concern (LC)?

• When a taxon is classified as Least Concern (LC), it has been evaluated against the Red List criteria and does not meet the criteria for:
  • Critically Endangered,
  • Endangered,
  • Vulnerable, or
  • Near Threatened

Evaluation of Least Concern Species

• Following the IUCN 2001 Categories & Criteria, the category has been abbreviated "LC" since 2001.
• Prior to 2001, "least concern" was a subcategory of "Lower Risk," with the code "LR/lc" or lc.
• Around 20% of the least concern taxa in the IUCN database (3261 of 15636) still have the code "LR/lc," indicating that they have not been re-evaluated since 2000.

Number of Least Concern Species

• While the IUCN does not consider "least concern" to be a red-listed category, the 2006 IUCN Red List assigns the category to 15636 taxa.
• This category contains 14033 animal species (which includes several undescribed species such as a frog from the genus Philautus).
• There are also 101 animal subspecies and 1500 plant taxa (1410 species, 55 subspecies, and 35 varieties).
• The classification does not apply to fungi or protista, though only four species from those kingdoms have been evaluated by the IUCN.
• Humans fit into this category because they are abundant, and the IUCN formally recognised this in 2008.

Examples of Least Concern (LC)

American Alligator, American Crow, Indian Peafowl, Baboon, Bald Eagle, Brown Bear, Brown Rat, Brown-throated Sloth, Canada Goose, Cane Toad, Common Wood Pigeon, Cougar, Common Frog, Orca, Giraffe, Grey Wolf, House Mouse, Human, Palm Cockatoo, Cowfish, Mallard, Meerkat, Mute Swan, Platypus, Red-billed Quelea, Red-tailed Hawk, Rock Pigeon, Scarlet Macaw, Southern Elephant Seal, Milk shark, and Red Howler Monkey

Conclusion

The IUCN Red List of Threatened Species is widely regarded as the most comprehensive and objective global approach to assessing plant and animal conservation status. Least Concern (LC), a category that includes species that are widespread and abundant after careful evaluation. If a species is common or abundant and is likely to survive in the wild, it is designated as least concern. There is no immediate threat to the survival of the Least Concern species.

FAQs

Question: What does Least Concern (LC) mean in the context of IUCN classification?

Question: How is the LC (Least Concern) classification determined by IUCN?

Question: Why is LC classification important for biodiversity conservation?

Question: Can a species move from LC (Least Concern) to a more threatened category in the future?

Question: What are some examples of species classified as Least Concern (LC)?

MCQs

1. Which of the following is Least Concern (LC) according to the IUCN Red List?

A) Bengal tiger

B) Snow leopard

C) House sparrow

D) African elephant

2. How does a species qualify for the LC (Least Concern) classification?

A) It has a rapidly declining population

B) It has a stable and abundant population

C) It has a restricted habitat range

D) It is facing severe threats

3. Can a species move from LC to a more threatened category in the IUCN classification?

A) No, once a species is classified as LC, it remains LC forever

B) Yes, if new threats arise, the species can be reclassified to a more threatened category

C) No, because species classified as LC are already considered safe

D) Yes, but only if the species becomes extinct

4. Which of the following factors is NOT typically associated with species classified as LC?

A) Large and stable population

B) Widespread and secure habitats

C) Facing immediate risks like habitat destruction

D) Minimal to no significant threats

5. What is the IUCN Red List used for?

A) To classify species based on their appearance

B) To track the population size of all species worldwide

C) To assess the conservation status of species and identify those at risk

D) To list only extinct species

GS Mains Questions and Model Answer

Q1: Discuss the role of the IUCN Red List in conservation and explain the significance of the Least Concern (LC) classification.

Answer: The IUCN Red List plays a critical role in global biodiversity conservation by assessing species' conservation status and tracking their population trends. The Least Concern (LC) category signifies species that are stable and not at immediate risk of extinction, allowing conservation efforts to focus on more threatened species. Monitoring LC species ensures early detection of potential threats, aiding proactive conservation planning.

Q2: What are the main criteria used by the IUCN to assess whether a species should be classified as Least Concern (LC)?

Answer: The IUCN uses criteria like population size, distribution, threat levels, and ecological role to determine LC classification. Species with stable populations, wide habitat ranges, and minimal threats are classified as LC. This helps track species' status and prevent future risks.

Q3: Explain the importance of monitoring species classified as Least Concern (LC) and how it contributes to global biodiversity conservation efforts.

Answer: Monitoring LC species ensures ecosystems remain balanced and provides early warnings of population declines or emerging threats. This proactive approach aids in preventing species from moving to more threatened categories, contributing to global biodiversity conservation and ecosystem resilience.

Previous Year Questions on  Least Concern

1. UPSC CSE 2021

Question: Explain the role of the IUCN Red List in global biodiversity conservation and assess the significance of the Least Concern (LC) classification.

Answer: This question emphasizes the importance of the IUCN Red List in tracking species' conservation status and the role of LC classification in focusing conservation efforts on more vulnerable species while ensuring LC species remain monitored for emerging risks.

2. UPSC CSE 2020

Question: How does the IUCN Red List help in the conservation of endangered species, and what is the importance of categorizing species as Least Concern (LC)?

Answer: This question highlights the IUCN Red List’s role in identifying species at risk and ensuring LC species are tracked to maintain biodiversity and ecological balance while prioritizing conservation for more vulnerable species.