UPSC CSE 2023 · GS1 · 10 marks · 150 words · Physical Geography

Explain the formation of the Western Ghats and their ecological significance for peninsular India.

Biodiversity hotspotendemic speciesescarpmentDeccan plateauWestern DisturbanceWGEEP

🎯 How to approach this question

• Start with geological formation: Gondwanaland breakup, escarpment structure, relation to Deccan Plateau

• Define ecological significance with UNESCO recognition as biodiversity hotspot

• Quantify with data on endemic species (flora and fauna percentages)

• Explain climatic role: orographic rainfall, river systems, monsoon interception

• Mention WGEEP recommendations and conservation challenges

• Conclude with way forward emphasizing sustainable development

Model Answer (English)

Formation of Western Ghats

The Western Ghats are a continuous **escarpment** running parallel to India's western coast (~1,600 km). They were formed during the **breakup of Gondwanaland** (~150 million years ago) when the Indian plate separated from Madagascar, creating a tilted block-mountain structure. The western edge was uplifted forming steep cliffs while the eastern side slopes gradually toward the **Deccan Plateau**. Volcanic activity during the Cretaceous period further shaped the topography.

Ecological Significance

**Biodiversity Hotspot**: Recognized as one of the world's eight 'hottest hotspots' of biological diversity by [UNESCO World Heritage, 2012]. Over **7,402 flowering plant species** with 27% endemism.

**Endemic Species**: Houses **325 globally threatened species** including Lion-tailed Macaque and Nilgiri Tahr. Nearly **50% of amphibian species** are endemic.

**Climatic Role**: Acts as a barrier to **Western Disturbances** (though primarily monsoon winds), causing orographic rainfall supporting peninsular rivers like Godavari and Krishna.

**Conservation**: [WGEEP (Western Ghats Ecology Expert Panel)] under Madhav Gadgil emphasized Ecologically Sensitive Areas (ESAs) for sustainable management.

Balancing development with conservation through community participation remains critical for preserving this ecological treasure.

मॉडल उत्तर (हिंदी)

पश्चिमी घाट का निर्माण

पश्चिमी घाट भारत के पश्चिमी तट के समानांतर एक सतत **कगारी भृगु** (escarpment) है (~1,600 किमी)। इसका निर्माण **गोंडवानालैंड के विखंडन** के दौरान (~15 करोड़ वर्ष पूर्व) हुआ जब भारतीय प्लेट मेडागास्कर से अलग हुई, जिससे एक झुकी हुई भ्रंश-पर्वत संरचना बनी। पश्चिमी किनारा उत्थित होकर खड़ी चट्टानें बनाता है जबकि पूर्वी भाग **दक्कन के पठार** की ओर धीरे-धीरे ढलान बनाता है।

पारिस्थितिक महत्व

**जैव विविधता हॉटस्पॉट**: [यूनेस्को विश्व धरोहर, 2012] द्वारा मान्यता प्राप्त। **7,402 पुष्पीय पादप प्रजातियां** जिनमें 27% स्थानिक हैं।

**स्थानिक प्रजातियां**: **325 वैश्विक रूप से संकटग्रस्त प्रजातियां** जैसे शेर-पुच्छ मकाक और नीलगिरि तहर। लगभग **50% उभयचर प्रजातियां** स्थानिक हैं।

**जलवायु भूमिका**: **पश्चिमी विक्षोभ** (मुख्यतः मानसून पवनों) के लिए अवरोधक, जो उत्पीड़न वर्षा उत्पन्न करता है और गोदावरी-कृष्णा जैसी नदियों को पोषित करता है।

**संरक्षण**: माधव गाडगिल के [WGEEP] ने पारिस्थितिक संवेदनशील क्षेत्रों (ESAs) पर बल दिया।

सामुदायिक भागीदारी के साथ विकास और संरक्षण का संतुलन आवश्यक है।

🎯 दृष्टिकोण

• भूवैज्ञानिक निर्माण से प्रारंभ करें: गोंडवानालैंड विखंडन, कगारी संरचना, दक्कन पठार से संबंध

• यूनेस्को मान्यता के साथ जैव विविधता हॉटस्पॉट के रूप में पारिस्थितिक महत्व परिभाषित करें

• स्थानिक प्रजातियों पर आंकड़ों के साथ मात्रात्मक विवरण (वनस्पति-जीव प्रतिशत)

• जलवायविक भूमिका स्पष्ट करें: उत्पीड़न वर्षा, नदी तंत्र, मानसून अवरोधन

• WGEEP सिफारिशों और संरक्षण चुनौतियों का उल्लेख करें

• सतत विकास पर बल देते हुए आगे की राह के साथ समापन करें

🧠 Examiner's Insight

A 40% answer merely describes location and lists biodiversity features. A 60%+ answer demonstrates understanding of geological processes (escarpment formation, plate tectonics), provides specific data (endemic percentages, threatened species count), connects WGEEP recommendations to conservation challenges, and shows awareness of development-environment trade-offs with a balanced conclusion.

Facts worth memorizing

→Western Ghats: ~1,600 km stretch from Gujarat (Tapti) to Kerala (Kanyakumari), average elevation 1,200m
→UNESCO World Heritage Status (2012): 39 properties across 7 sub-clusters covering 7,95,315 hectares
→Biodiversity: 7,402 flowering plants (27% endemic), 1,814 non-flowering plants (35% endemic), 139 mammals (16 endemic)
→WGEEP (2011): Madhav Gadgil Committee recommended entire Western Ghats as Ecologically Sensitive Area in three categories (ESZ 1, 2, 3)
→Kasturirangan Committee (2013): Proposed 37% area as ESA (compared to WGEEP's 64%), caused less restriction on development
→Climate: Receives 2,000-8,000mm annual rainfall; source of major peninsular rivers: Godavari, Krishna, Kaveri, Tungabhadra
→Six mega biodiverse regions in India: Western Ghats, Eastern Himalayas, North-East, Western Himalayas (four of world's 34 biodiversity hotspots)

Now write it yourself — and get examiner-grade feedback

Handwrite this answer, photograph it, and our AI (calibrated on real examiner-scored copies) scores it on the 9-parameter UPSC rubric in 60 seconds. English or हिंदी. 3 free/month.

Evaluate my answer free →