UPSC GS–1 | PHYSICAL GEOGRAPHY

1. Lake Baikal

Subtopic: Rift Lakes, Freshwater Resources

Value Addition:

• Location: Southern Siberia, Russia (near Mongolia).

• Geological Age: 20–25 million years (oldest freshwater lake).

• Type: Continental rift lake (Baikal Rift Zone).

• Maximum Depth: 1,642 m (deepest lake globally).

• Sediment Depth: ~7 km (deepest continental rift system).

• Surface Area: ~31,722 sq km (largest freshwater lake by area).

• Water Volume: Holds ~20% of world’s unfrozen surface freshwater.

• Hydrology:

  • ~330 inflowing rivers (Selenga major contributor).

  • Single outflow: Angara River.

• Freezing Pattern: Freezes Jan–May/June.

• Largest Island: Olkhon Island.

• UNESCO Status: World Heritage Site (1996).

Subject Analysis:

• High probability in prelims for deepest/oldest/largest lake distinctions.

• Important for mains under rift tectonics & freshwater geopolitics.

UPSC GS–2 | GOVERNANCE & TOURISM

2. PRASHAD Scheme

Subtopic: Religious Tourism & Infrastructure Development

Value Addition:

• Full Form: Pilgrimage Rejuvenation and Spiritual Heritage Augmentation Drive.

• Launched: 2014–15 (Ministry of Tourism).

• Type: Central Sector Scheme (100% central funding).

• Objective: Integrated development of pilgrimage sites.

• Funding Pattern: Fully centrally funded; allows CSR & PPP participation.

• Implementation: Through Mission Directorate.

• Impact Areas:

  • Infrastructure improvement.

  • Local employment generation.

  • Skill development in tourism sector.

Subject Analysis:

• Prelims focus: Scheme type & funding pattern.

• Mains relevance: Soft power, cultural tourism, local economy multiplier effect.

3. Traditional Knowledge Digital Library (TKDL)

Subtopic: IPR Protection & Biopiracy Prevention

Value Addition:

• Established: 2001 (CSIR + Ministry of AYUSH).

• Purpose: Prevent wrongful patents on Indian traditional knowledge.

• Coverage: 5.2+ lakh formulations (Ayurveda, Unani, Siddha, Sowa Rigpa, Yoga).

• Languages Available: English, German, French, Japanese, Spanish.

• Access: Controlled via Non-Disclosure Agreements.

• Global Reach: 18 patent offices have access (including Brazil).

• Nature: Defensive protection mechanism.

Subject Analysis:

• Important prelims topic on biopiracy cases (Neem, Turmeric).

• Useful in mains under TRIPS & traditional knowledge protection diplomacy.

UPSC GS–3 | BIODIVERSITY

4. Black-Necked Crane (Grus nigricollis)

Subtopic: High-Altitude Wetland Species

Value Addition:

• Habitat: Tibetan Plateau; Ladakh; Arunachal Pradesh.

• Altitude Range: 2,600–4,900 m.

• Breeding Grounds: Alpine marshes.

• Distinct Feature: Black head & upper neck; red eye patches.

• IUCN Status: Near Threatened.

• Legal Protection:

  • CITES Appendix I.

  • Schedule I, Wildlife Protection Act, 1972.

  • CMS Convention protected.

Subject Analysis:

• Frequently asked under species–habitat pairing.

• Mains linkage: Wetland conservation & climate vulnerability in Himalayas.

5. Fishing Cat (Prionailurus viverrinus)

Subtopic: Wetland Mammals

Value Addition:

• Habitat: Mangroves, marshes, swamps.

• Distribution: India, Sri Lanka, SE Asia.

• Indian Hotspots: Sundarbans, Brahmaputra valley, Western Ghats.

• Unique Trait: Strong swimmer; dives to catch fish.

• IUCN Status: Vulnerable.

• Legal Protection: Schedule I (Wildlife Protection Act).

Subject Analysis:

• Important for prelims under wetland-dependent fauna.

• Useful in mains for wetland degradation & human–wildlife conflict.

6. Kole Wetlands (Kerala)

Subtopic: Ramsar Sites & Wetland Agriculture

Value Addition:

• Location: Thrissur & Malappuram districts.

• Ramsar Site: Declared 2002.

• Flyway: Central Asian Flyway.

• Agricultural Feature: 300-year-old paddy cultivation system.

• Ecological Status: Important Bird Area (BirdLife International).

• Saltwater Intrusion: Seasonal flooding & bund system agriculture.

Subject Analysis:

• Prelims focus: Ramsar site location matching.

• Mains relevance: Wetland–agriculture balance & climate resilience.

7. Pygmy Grasshoppers

Subtopic: Orthoptera Order Characteristics

Value Addition:

• Size: ~15 mm.

• Wings: Reduced or absent forewings.

• Reproduction: Lay eggs individually in soil grooves.

• Distinguishing Feature: No sound or hearing organs.

• Habitat: Short grasses, muddy shores.

Subject Analysis:

• Useful for prelims under insect classification & morphological differences.

UPSC GS–3 | AGRICULTURE

8. Apple Cultivation (Malus pumila)

Subtopic: Temperate Horticulture

Value Addition:

• Climate: 21–24°C summer; 1,000–1,250 mm rainfall.

• Altitude: 1,500–2,700 m.

• Soil: Well-drained loamy soil.

• Major States: J&K, Himachal, Uttarakhand.

• Economic Significance: 50% horticulture output of J&K.

Subject Analysis:

• Important for prelims in crop–climate pairing.

• Mains use: Horticulture diversification & cold-chain infrastructure.

UPSC GS–3 | SCIENCE & TECHNOLOGY

9. Tetrodotoxin

Subtopic: Marine Neurotoxins

Value Addition:

• Nature: Highly potent marine neurotoxin.

• Source: Puffer fish (Tetraodontidae family).

• Mechanism: Blocks sodium channels → muscle paralysis.

• Toxicity: >1000 times more toxic than cyanide.

• Risk: Fatal if untreated; linked to seafood poisoning.

Subject Analysis:

• Prelims focus: toxin-source association.

• Mains relevance: Food safety regulation & marine biodiversity risks.