Coral Reef Bleaching UPSC 2026 🔥 4th Mass Event Explained | Environment Current Affairs #shorts

🔥 Coral Reef Bleaching UPSC 2026 | 4th Mass Bleaching Event | Environment Current Affairs

80-85% of world's coral reefs are under heat stress. Since September 2023, we are living through the 4th Mass Coral Bleaching Event — and 60% of reefs are damaged beyond the point of no return. UPSC Prelims 2026 (25 May) का सबसे BURNING Environment topic यही है!

✅ इस Short में cover हुआ:
• 4th Mass Coral Bleaching Event (Sep 2023 - ongoing)
• Coral Polyp + Zooxanthellae symbiotic relationship
• 3 Growth Conditions: SST 27-27.5°C, Photic zone, Clear water, Salinity 30-35 ppt
• Types of Reefs: Fringing, Barrier, Atoll, Patch
• Bleaching Mechanism: Rising SST → Zooxanthellae expulsion → Marine ecology collapse
• 4 Threat Factors:
1. Global Warming + Marine Heat Waves
2. Ocean Acidification (CO2 → pH drop → coral dissolves)
3. Industrial pollution, Oil spills, Eutrophication, Algal bloom
4. Biological threats: Bacterial outbreak + Invasive species (ballast water)

🎯 UPSC PYQ: Coral reefs asked in 2018, 2019, 2021, 2023 — HIGH probability in 2026!

📌 For: UPSC CSE 2026 | BPSC | UPPSC | SSC CGL | All Environment exams

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