GEOGRAPHY OPTIONAL – PAPER I
PAGE 17 : BIOGEOGRAPHY – ECOSYSTEMS & BIODIVERSITY
UPSC / UPPSC Geography Optional
Shaktimatha 369 Learning
1. Introduction to Biogeography
Biogeography is the study of the spatial distribution of plants, animals and ecosystems in relation to physical environment.
It integrates geography, ecology and biology.
Exam Importance: Short questions + high scoring
2. Ecosystem – Meaning
An ecosystem is a functional unit consisting of biotic components (plants, animals, microorganisms) and abiotic components (air, water, soil, climate).
Components of Ecosystem
- Producers
- Consumers
- Decomposers
3. Types of Ecosystems
(a) Natural Ecosystems
- Terrestrial
- Aquatic
(b) Artificial Ecosystems
- Agricultural fields
- Urban ecosystems
4. Biomes
Biomes are large ecological regions characterised by specific climate, vegetation and fauna.
Major Biomes
- Tropical Rainforest
- Savanna
- Desert
- Temperate Forest
- Taiga
- Tundra
Diagram Mandatory: World biomes map
5. Biodiversity
Biodiversity refers to the variety and variability of life forms at genetic, species and ecosystem levels.
Levels of Biodiversity
- Genetic diversity
- Species diversity
- Ecosystem diversity
6. Biodiversity Hotspots
- Regions with high endemism
- Under threat from human activities
Indian Hotspots:
- Western Ghats
- Eastern Himalayas
- Indo-Burma
- Sundaland (Nicobar Islands)
7. Biogeographical Zones of India
- Trans-Himalayan
- Himalayan
- Desert
- Semi-arid
- Western Ghats
- Deccan Plateau
- Gangetic Plains
- North-East
- Islands
GS Link: Conservation, wildlife protection
8. Threats to Biodiversity
- Deforestation
- Habitat fragmentation
- Climate change
- Invasive species
- Pollution
9. Conservation of Biodiversity
- In-situ conservation
- Ex-situ conservation
- Protected areas
- Community participation
Indian Examples: National Parks, Biosphere Reserves
10. Answer Writing Strategy
- Use definitions & classifications
- Draw biome / hotspot maps
- Add Indian examples
- Link with conservation
Golden Rule: Biome map + hotspot example = sure marks
PYQ Orientation
- Biodiversity hotspots of India
- Ecosystem components
- Threats to biodiversity
NEXT PAGE
Geography Optional – Page 18:
Soil Geography – Formation, Types & Degradation
End of Geography Optional – Page 17
Shaktimatha 369 Learning
UPSC / UPPSC Geography Optional – Complete Master Library
Shaktimatha 369 Learning
Paper–I & Paper–II | Concepts • Diagrams • PYQs • Answer Writing
📍 PART–A : Physical Geography
- Geography Optional Overview & Strategy
- Earth Origin & Plate Tectonics
- Geomorphic Processes (Endogenic & Exogenic)
- Fluvial Landforms
- Glacial Landforms
- Aeolian Landforms
- Coastal & Marine Landforms
🌦️ PART–B : Climatology
- Atmospheric Structure
- Insolation & Heat Budget
- Atmospheric Circulation & Winds
- Moisture, Clouds & Precipitation
- Köppen Climate Classification
🌊 PART–C : Oceanography
- Ocean Relief & Temperature
- Salinity, Density & Ocean Currents
- Ocean–Atmosphere Interaction & Fisheries
🌱 PART–D : Biogeography & Soils
🏘️ PART–E : Human Geography
- Population Distribution & Migration
- Demographic Transition & Policies
- Settlement Geography (Rural & Urban)
🏭 PART–F : Economic Geography
🌍 PART–G : Regional, Environmental & Political Geography
- Regional Planning & Development
- Environmental Geography & Sustainability
- Political Geography & Geopolitics
- Social Geography
🛰️ PART–H : Applied Geography
📚 COMPLETE UPSC / UPPSC STUDY HUB
End of Geography Optional Master Library
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