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UPSC Prelims Question Bank
Unit 1. Ecology Fundamentals
Introduction to Environment
Levels of Ecological Organization
Habitat and Niche
Adaptation
Species, Speciation & Variation
Evolution in Ecology
Ecological Tolerance (Shelford’s Law)
Ecological Amplitude (Generalist vs Specialist)
Population Growth
Carrying Capacity
Population Regulation
Life History Strategies (r/K Selection)
Life History Variation
Population Interactions
Unit 2. Ecosystem Fundamentals
Introduction to Ecosystem
Ecosystem Components
Biotic–Abiotic Interactions
Types of Ecosystems
Trophic Levels
Food Chains
Food Web
Ecosystem Productivity
Standing Crop & Standing State
Energy Flow
Ecological Efficiency (10% Law)
Ecological Pyramids
Nutrient Cycling
Decomposition
Ecological Succession
Ecosystem Homeostasis
Resistance & Resilience
Ecotone & Edge Effect
Unit 3. Biomes and Biogeographic Regions
Biome Concept
Terrestrial Ecosystem Patterns
Aquatic Ecosystem Patterns
Biosphere Perspective
Levels of Biodiversity
Alpha, Beta & Gamma Diversity
Species–Area Relationship
Latitudinal Diversity Gradient
Keystone Species
Indicator Species
Umbrella Species
Flagship Species
Biodiversity Hotspots
Ecosystem Diversity
Ecosystem Services
Unit 4. Forests (World)
Forest Ecosystem
Forest Succession
International Tropical Timber Organization
United Nations Forum on Forests
Tropical Forest Alliance
Forest Principles (Rio)
REDD & REDD+
Forest Biodiversity Economics
Forest Funding Mechanisms
Climate Finance for Forests
Unit 5. Forests (India)
National Forest Policy, 1988
Forest Rights Act, 2006
National Afforestation and Eco-Development Board
CAMPA
Joint Forest Management
Social Forestry
National Bamboo Mission
Mangroves for the Future
Forest Plus Programme
Impact of COVID-19 on Forests
Expansion of Thar Desert
Forest Fires in India
Eco-sensitive Zones (ESZs) around Forests
Silent Valley Biodiversity
Unit 6. Wetlands, Mangroves and Coral Reefs (World)
Wetlands: Importance, Functions, Threats & Conservation
Wetlands International
Ramsar Convention
Mangroves for the Future
Mangrove Alliance for Climate
Coral Reefs: Conservation & Global Issues
Coral Reef Restoration
Barrier Reef Case Studies
Blue Carbon Ecosystems
Unit 7. Wetlands, Mangroves and Coral Reefs (India)
Wetlands in India
Wetlands (Conservation and Management) Rules, 2017
National Plan for Conservation of Aquatic Ecosystems
Sundarbans as Ramsar Site
Seagrass Management in Palk Bay
MISHTI Scheme
Mangrove Conservation in India
Coral Conservation in India
Coastal Ecosystem Reports (CAG)
Coastal Vulnerability Index (INCOIS)
Marine & Coastal Biodiversity Areas
Marine Protected Areas
Bhitarkanika Coastal Ecosystem
Unit 8. Fauna (World)
Faunal Diversity Overview
Invertebrates
Vertebrates
IUCN Red List
Threatened Species
Endemic Species
Invasive Fauna
International Whaling Commission
BirdLife International
Conservation International
Convention on Migratory Species
Gorilla Agreement
Bat Agreement
TRAFFIC
Coalition Against Wildlife Trafficking
Extinct Bird Species
Future Risks to Birds
Pollinator Decline
Blue Whale
Tasmanian Tiger
Unit 9. Fauna (India)
Project Tiger
Tiger Reserve Strategy
Tiger Task Force
National Tiger Conservation Authority
Tiger Census
Project Elephant
Elephant Corridors & Threats
Elephant Mitigation Measures
Project RE-HAB
Project Lion
Asiatic Lion
Project Snow Leopard
Project Cheetah
Project Hangul
Project Crocodile
Crocodile Census & Species
Project Great Indian Bustard
Project Dolphin
Olive Ridley Turtle
Greater Adjutant
Hoolock Gibbons
Spot-billed Pelicans
Blackbuck
Sangai Deer
Slender Loris
One-horned Rhinoceros
Indian Rhino Vision
Rhino Reintroduction
Vulture Crisis in India
MIKE Programme
Hornbill Watch Initiative
Recovery Programme for Endangered Species
Unit 10. Flora (World)
Floral Diversity Overview
Plant Diversity Structure
Invasive Alien Species
Botanical Gardens
Seed Banks & Gene Banks
Cryopreservation
Svalbard Global Seed Vault
Extinct Plant Species
New Plant Varieties
Special Plant Types
Plant Functional Types
Ecosystem Restoration Techniques
Unit 11. Flora (India)
Medicinal Plants
Ayurvedic Herbs
Indian Seed Vault
Miyawaki Method
Organic Farming
Zero Budget Natural Farming
Precision Farming
Agroforestry
Salicornia
Red Sanders
Indian Virtual Herbarium
New Plant Discoveries
Sikkim Tree Initiative
Unit 12. Environment Treaties and Organizations
UNEP
UNDP
GEF
Green Climate Fund
IPCC
IUCN
IUCN Nature 2030
Himalayan Adaptation Network
WWF
Wetlands International
BirdLife International
Conservation International
World Resources Institute
SACEP
SAWEN
Climate Vulnerable Forum
Coalition for Disaster Resilient Infrastructure
Champions of the Earth
Young Champions of the Earth
SEED Awards
Sasakawa Prize
Unit 13. Environment Laws (India)
Wildlife Protection Act
Environment Protection Act
Environment Protection Rules
National Forest Policy
Forest Rights Act
Coastal Regulation Zone
Wetlands Rules
National Green Tribunal
Ozone Depleting Substances Rules
Biological Diversity Act
National Wildlife Action Plan
CEPI
Eco-Mark
Environmental Rating Agencies
National Clean Energy Fund
National Electric Mobility Mission Plan
Green Building Codes
Energy Conservation Building Code
Green Bonds
Polluter Pays Principle
Precautionary Principle
Public Trust Doctrine
Unit 14. Protected Areas (World)
Protected Area Concepts
Biosphere Reserves
World Heritage Sites
Ramsar Sites
Marine Protected Areas
Antarctic Treaty System
Environmental Protocol
CCAMLR
GIAHS
Global Tiger Initiatives
Global Wildlife Trafficking Initiatives
Unit 15. Protected Areas (India)
Biosphere Reserves in India
National Parks in India
Ramsar Sites in India
Biodiversity Heritage Sites
Coastal & Marine Biodiversity Areas
Marine Protected Areas (India)
World Heritage Sites in India
Mixed Heritage Sites
Eco-sensitive Zones
Conservation Reserves
Community Reserves
Wildlife Corridors
Orang Tiger Reserve
Kaziranga National Park
Bhitarkanika National Park
Dudhwa National Park
Silent Valley National Park
Unit 16. Pollution and Pollution Control
Pollution Overview
Air Pollution
Indoor Air Pollution
Smog
Fly Ash
AQI
Acid Rain
Water Pollution
Wastewater
Bioremediation
Soil Pollution
Noise Pollution
Thermal Pollution
Nuclear Pollution
Marine Pollution
Solid Waste Management
Plastic Pollution
E-waste
River Pollution
Heavy Metal Pollution
Microplastics
Bioaccumulation & Biomagnification
Pollution Control Technologies
Unit 17. Climate Change
Evidence of Climate Change
Causes of Climate Change
Climate Forcings
Greenhouse Effect
Global Warming
Carbon Cycle & Climate Link
Carbon Sequestration
Climate Feedbacks
Tipping Points
Impacts on Agriculture
Impacts on Water
Sea Level Rise
Impacts on Biodiversity
Impacts on Health
Climate Change in India
Glacier Retreat
Extreme Events
GHG Inventory
Climate Policies
Mitigation
Adaptation
Climate Justice
Net Zero
Loss & Damage
Unit 18. Sustainability
Sustainable Development
Principles
Green Economy
MDGs
SDGs
SDGs in India
Environmental Kuznets Curve
Environment vs Development
Green GDP
Green Finance
Resource Efficiency
Circular Economy
ESG
Planetary Boundaries
Sustainability Initiatives in India
Unit 19. Disaster Management
Disaster Management
Climate Link
Coastal Adaptation
Preparedness
Early Warning Systems
SAFAR
Sendai Framework
Environmental Hazards
Environmental Refugees
Nature-based Solutions
Unit 20. Environmental Impact Assessment
EIA Introduction
EIA in India
Importance of EIA
Environmental Clearance
Industrial Categorisation
Components of EIA
EIA Process
Advantages & Limitations
Strategic Environmental Assessment
Environmental Auditing
Cumulative Impact Assessment
Envionment, Ecology and Biodiversity for UPSC Prelims
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