First Sea Anemone Bleaching Event Observed in Lakshadweep Islands | IAS Banenge

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Researchers investigating Sea Anemones (Actiniaria) in the Lakshadweep group of islands have documented a significant bleaching event among the anemones off Agatti island. This marks the first observed instance of sea anemone bleaching in the Lakshadweep islands.

Relevance:

Facts for Prelims

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Understanding Sea Anemone Bleaching:

Definition:

• Sea anemone bleaching refers to the phenomenon where these organisms lose their vibrant colors, turning white or pale due to the expulsion of symbiotic photosynthetic algae.

Causes:

• Environmental stressors such as increased water temperatures, pollution, or alterations in ocean chemistry can trigger bleaching events.

Consequences:

• Bleaching deprives sea anemones of their primary energy source, heightening susceptibility to diseases and elevating mortality rates.

Characteristics and Ecological Significance of Sea Anemones:

Physical Traits:

• Aquatic animals characterized by soft bodies and the ability to sting.

Taxonomy and Habitat:

• Belonging to the Cnidaria phylum, sea anemones inhabit ocean waters, especially in coastal tropical regions.

Ecological Relationships:

• Form close associations with corals and live rocks, often forming symbiotic bonds with clownfish wherein they provide protection in exchange for food.

Ecological Role:

• Vital contributors to benthic ecosystems, playing crucial biogeochemical roles in the lowest ecological zone of water bodies, typically involving sediments at the seafloor.

Geographical Information:

Location:

• Agatti Island is situated approximately 459 km (248 nautical miles) west of Kochi (Kerala) and is positioned to the west of Kavaratti Island.

-Source: The Hindu