Learning Objectives
- Understand the causes and consequences of deforestation
- Learn about biodiversity and its importance
- Know about wildlife sanctuaries, national parks, and biosphere reserves
- Understand conservation efforts and the role of Red Data Book
Key Concepts
Deforestation
Deforestation is the clearing of forests for various purposes. Causes include agriculture, building houses and factories, making furniture, using wood as fuel, and building roads and dams.
Consequences of deforestation: Increase in CO₂ levels (global warming), decrease in rainfall, soil erosion, flooding, droughts, loss of biodiversity, desertification, and disruption of the water cycle.
Conservation of Forests and Wildlife
Biosphere Reserve: Large protected areas for conservation of biodiversity including wildlife, plants, and traditional life of local tribes. Examples: Pachmarhi Biosphere Reserve, Sundarbans, Nilgiri.
National Park: Areas reserved for wildlife where no human activity like grazing or forestry is allowed. Examples: Satpura National Park, Jim Corbett National Park.
Wildlife Sanctuary: Protected areas where animals are protected from hunting or disturbance. Limited human activities are allowed. Examples: Pachmarhi Wildlife Sanctuary.
Biodiversity
Biodiversity refers to the variety of living organisms in a specific area. It includes diversity within species, between species, and of ecosystems. Biodiversity is essential for the stability of ecosystems.
Flora and Fauna
Flora: Plants found in a particular area. Fauna: Animals found in a particular area.
Endemic species: Species found exclusively in a particular area and nowhere else. They are especially vulnerable to extinction.
Endangered Species and Red Data Book
Endangered species: Species whose population has declined to a level where they face the risk of extinction. Examples: Bengal tiger, Indian rhinoceros.
Red Data Book: A record of endangered species maintained by IUCN (International Union for Conservation of Nature). Separate books exist for plants, animals, and other groups.
Reforestation and Afforestation
Reforestation: Replanting trees in areas where forests have been destroyed. Ideally, as many species as possible should be planted to restore the original ecosystem.
Afforestation: Planting trees in areas that were not previously forested.
Paper can be recycled to save trees. Recycling one tonne of paper saves 17 trees.
Migration
Migration is the seasonal movement of animals from one place to another for breeding, food, or favourable conditions. Example: migratory birds travel long distances to warmer regions in winter.
Summary
Deforestation leads to environmental problems including global warming, soil erosion, and loss of biodiversity. Conservation is done through biosphere reserves, national parks, and wildlife sanctuaries. The Red Data Book lists endangered species. Reforestation and recycling are essential for sustainability.
Important Terms
- Deforestation: Clearing of forests by cutting trees
- Biodiversity: Variety of living organisms in an area
- Endemic Species: Species found only in a particular geographical area
- Endangered Species: Species at risk of extinction
- Biosphere Reserve: Large protected area for biodiversity conservation
- Red Data Book: Record of endangered species maintained by IUCN
- Reforestation: Replanting trees in deforested areas
- Migration: Seasonal movement of animals to different habitats
Quick Revision
- Deforestation causes: global warming, soil erosion, floods, biodiversity loss
- Protected areas: Biosphere Reserve > National Park > Wildlife Sanctuary
- Flora = plants; Fauna = animals of a region
- Endemic species = found only in one area; vulnerable to extinction
- Red Data Book maintained by IUCN lists endangered species
- Recycling 1 tonne of paper saves 17 trees