Context:
The Zoological Survey of India (ZSI) discovered nine new species in the Megamalai Wildlife Sanctuary, highlighting its ecological significance.
Key Highlights:
Location & Status:
• Located in Tamil Nadu (Western Ghats region)
• Part of Srivilliputhur–Megamalai Tiger Reserve (51st Tiger Reserve) since 2021
• Eco-Sensitive Zone notified in 2018
Habitat Diversity:
• Montane Shola forests and grasslands
• Tropical wet evergreen forests
• Plantation ecosystems (tea, cardamom) interspersed with natural vegetation
Hydrological Importance:
• Acts as a watershed for southern Tamil Nadu
• Rivers: Vaigai, Suruliyaru, Shanmuganathi
• Supports agriculture via ephemeral streams
Ecological Connectivity:
• Forms corridor linking:
- Periyar Tiger Reserve (Kerala)
- Grizzled Giant Squirrel Sanctuary (Tamil Nadu)
Biodiversity Findings:
• 977 species recorded, including 9 new species:
- Jumping spider (Stenaelurillus megamalai)
- Mayflies (Edmundsula meghamalaiensis)
- Damselfly (Protosticta sholai)
- Bark lice, cockroaches, etc.
Ecological Indicators:
• Presence of mayflies and amphibians indicates high water quality
• Habitat supports rare species like Malabar Civet (Critically Endangered)
Relevant Prelims Points:
• Western Ghats: Biodiversity hotspot and UNESCO World Heritage site
• Tiger Reserves: Declared under Project Tiger
• Eco-Sensitive Zone (ESZ): Buffer area to regulate human activities
• Endemism: Species restricted to a specific geographic region
• Bio-indicators: Species indicating environmental health
Relevant Mains Points:
• Biodiversity Conservation:
- Western Ghats as global biodiversity hotspot
- Importance of protected areas and corridors
- Ecological Significance:
- Ensures water security and ecosystem services
- Maintains genetic diversity and species resilience
- Challenges:
- Human encroachment and plantation expansion
- Climate change impacts on fragile ecosystems
- Way Forward:
- Strengthen habitat conservation and corridor protection
- Promote scientific surveys and biodiversity documentation
- Enhance community participation in conservation
UPSC Relevance:
• GS 3: Environment, Biodiversity Conservation
• GS 1: Geography (Western Ghats)