Complete Ecology Marathon | Biology Crash Course | Day 21

Complete Ecology Marathon | Biology Crash Course | Day 21 by Biology Waali Annu Mam 🌱 Population Ecology: ✅ Population attributes — birth rate, death rate ✅ Age pyramid — growing, stable, declining ✅ Population growth — exponential + logistic ✅ J-shaped vs S-shaped curve ✅ Carrying capacity — K ✅ Population interactions — +/− symbols ✅ Mutualism, Commensalism, Predation, Parasitism, Amensalism, Competition 🌿 Ecosystem: ✅ Components — biotic + abiotic ✅ Food chain — Grazing + Detritus ✅ Food web — complex network ✅ Trophic levels + 10% Law — Lindemann ✅ Ecological pyramids — Number, Biomass, Energy ✅ Energy pyramid = always upright ✅ Nutrient cycling — Carbon + Nitrogen cycle ✅ Decomposition — FRIED steps ✅ Primary productivity — GPP vs NPP 🌍 Biodiversity: ✅ Types — Alpha, Beta, Gamma ✅ India = Megadiverse country ✅ Biodiversity Hotspots — Western Ghats + Eastern Himalayas ✅ HIPPO threats — Habitat loss = #1 ✅ Extinct animals — Dodo, Quagga, Thylacine ✅ In-situ vs Ex-situ conservation ✅ Nilgiri = India's FIRST Biosphere Reserve = 1986 ✅ Red Data Book — endangered species 🏭 Environmental Issues: ✅ Air pollution — causes + effects ✅ Greenhouse gases — CO2, CH4, N2O, CFC ✅ Global warming + Ozone depletion ✅ Montreal Protocol 1987 — CFC ban ✅ Water pollution — BOD concept ✅ Eutrophication — algal bloom ✅ Biomagnification — DDT ✅ Chipko Movement — 1973 — Sunderlal Bahuguna ✅ Bhopal Gas Tragedy — 1984 — MIC gas ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔔 SUBSCRIBE and press the Bell icon: 👉    / @biologywaaliannumam   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📲 CONNECT WITH ME: 📸 Instagram: https://www.instagram.com/biology_waa... 📱 Telegram: https://t.me/biologywaaliannumam20 💬 WhatsApp: https://whatsapp.com/channel/0029VbCe... 🌐 Website: https://biologywaali-annu-mam.vercel.app ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ THIS CHANNEL IS FOR YOU IF: → HTET PGT Biology aspirant → NEET 2026 / 2027 Biology student → KVS, NVS, DSSSB, CTET Biology teacher candidate → Class 11 & 12 Biology (CBSE/NCERT) → State PGT Biology (UP, Rajasthan, Haryana, MP, Bihar) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 👩‍🏫 ABOUT BIOLOGY WAALI ANNU MAM: 🏆 CSIR NET JRF — AIR 17 (2025) | AIR 32 (2023) 📚 Author of 6 Biology Books (FundaBox EdTech) ⭐ 5+ Years Teaching Experience 🎓 M.Sc Zoology | B.Ed Science ✅ GATE | CTET L1&L2 | HTET L1&L2 Qualified ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ #HTETBiology #HTET2025 #HTETPGT #HTETLevel3 #HTETEcology #EcologyMarathon #PopulationEcology #Ecosystem #Biodiversity #EnvironmentalIssues #HTETLastWeek #HTET3July #HTETPreparation #BiologyWaaliAnnuMam #PaperYahiSeAayega #10PercentLaw #HIPPO #NilgiriBiosphereReserve #Eutrophication #MontrealProtocol #ChipkoMovement #HTETCrackKaro #HTETRevision #NCERTBiology #PGTBiology