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Katchal island

  • IASbaba
  • August 12, 2022
  • 0
Geography
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In News: NASA highlights loss of mangrove cover on Katchal island in the Nicobars.

  • More than 90% of mangrove cover on the island was lost due to the Indian Ocean Tsunami.
  • After the magnitude-9.2 Aceh-Andaman earthquake in December 2004, the islands experienced up to 3 meters (10 feet) of land subsidence.
  • This submerged many mangrove ecosystems, resulting in a loss of more than 90 percent of mangrove extent in some areas.
  • The mangrove cover on Katchal will not come back, as it lacks propagules.
  • A propagule is a vegetative structure that can become detached from a plant and give rise to a new plant. Examples include a bud, sucker, or spore.

Source: Downtoearth.org

Previous Year Questions

Q.1) Consider the following statements: (2018)

  1. The Barren Island volcano is an active volcano located in the Indian territory.
  2. Barren Island lies about 140 km east of Great Nicobar.
  3. The last time the Barren Island volcano erupted was in 1991 and it has remained inactive since then.

Which of the statements given above is/are correct?

  1. 1 only
  2. 2 and 3
  3. 3 only
  4. 1 and 3

Q.2) Which one of the following statements best reflects the issue with Senkaku Islands, sometimes mentioned in the news? (2022)

  1. It is generally believed that they are artificial islands made by a country around South China Sea.
  2. China and Japan engage in maritime disputes over these islands in East China Sea.
  3. A permanent American military base has been set up there to help Taiwan to increase its defence capabilities.
  4. Though International Court of Justice declared them as no man’s land, some South-East Asian countries claim them.

 

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