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Science & TechnologyNCERT Class 8 · Science (Class 8)

Conservation of Plants and Animals

How deforestation threatens biodiversity, and how protected areas, conservation laws and sustainable practices safeguard India's flora and fauna.

⏱ 6 min readGS-III7 sections5 memory tricks
Why this matters for UPSC

Environment and biodiversity is one of UPSC's highest-yield Prelims zones - expect factual questions on protected-area categories, Red Data Book/IUCN, endemic-versus-endangered species and Project Tiger. For Mains GS-III it feeds conservation, deforestation, climate-change linkages and sustainable-development debates, while the constitutional duties (Art 48A, 51A-g) give a GS-II handle.

Understand the chapter

Deforestation: Meaning and Causes

Deforestation is the clearing of forests so the land can be used for other purposes. UPSC tests its dual origin - natural and man-made - and distinguishes it from mere forest degradation. In India the man-made drivers dominate.

  • Man-made causes: land for cultivation, building houses and factories, furniture and fuel-wood.
  • Natural causes: forest fires and severe droughts.

Consequences of Deforestation

Deforestation disturbs the balance of nature across climate, soil and water. Fewer trees absorb less carbon dioxide, so atmospheric CO2 rises and traps reflected heat, causing global warming that disturbs the water cycle and can reduce rainfall. The same loss of cover degrades soil and lowers groundwater.

  • Climate: higher temperature, more CO2, global warming, weaker water cycle, less rainfall, droughts.
  • Soil: more erosion and loss of humus/fertility, leading to desertification.
  • Water: lower groundwater table and reduced infiltration, causing floods.

Protected Areas: The Three Tiers

To protect flora, fauna and their habitats the government earmarks protected areas where plantation, cultivation, grazing, felling, hunting and poaching are prohibited. The three categories differ in scope and in how much human use they permit - the favourite Prelims discriminator.

  • Wildlife Sanctuary: protects animals in their habitat; limited human activity allowed (grazing, firewood, collecting medicinal plants).
  • National Park: larger; protects whole ecosystems, flora, fauna, landscape and historic objects; human activity prohibited.
  • Biosphere Reserve: largest; conserves biodiversity plus the traditional life of tribals, and may contain national parks and sanctuaries within it.

Biodiversity: Flora, Fauna, Endemic and Endangered

Biodiversity is the variety of organisms in an area together with their interrelationships and relationship with the environment. The plants of an area are its flora and the animals its fauna. UPSC repeatedly exploits the gap between endemic and endangered.

  • Endemic species: found exclusively in one area and nowhere else naturally (e.g., Indian giant squirrel of Pachmarhi).
  • Endangered species: numbers falling toward possible extinction.
  • Threats to endemics: habitat destruction, rising human population, and introduction of new (invasive) species.
  • Species: a group of populations that can interbreed to produce fertile offspring.

Records and Projects: Red Data Book and Project Tiger

Awareness is translated into action through records and projects. The Red Data Book is the source book of endangered plants and animals, maintained internationally by the IUCN, with India keeping its own version. Project Tiger targets the survival of tiger populations.

  • Red Data Book: international record kept by IUCN; India maintains a national one.
  • Project Tiger: launched in 1973 for tiger survival; today administered by the NTCA.
  • Small animals (snakes, frogs, lizards, bats, owls) face extinction risk too and are vital to food chains and webs.
  • Ecosystem: all plants, animals and microorganisms of an area plus non-living parts like climate, soil and river deltas.

Solutions: Reforestation, Recycling and Law

The chapter's remedies are reforestation, paper recycling and supportive law. Reforestation restocks destroyed forest by planting at least as many trees as were cut, preferably of the same species, and can also occur naturally if the area is left undisturbed. Saving paper directly saves trees, energy and water.

  • Paper: 1 tonne needs 17 full-grown trees; paper can be recycled 5-7 times - so save, reuse, recycle.
  • Migratory birds travel long distances yearly due to climatic change, mainly to breed and lay eggs.
  • Forest (Conservation) Act, 1980 conserves natural forests while meeting the needs of forest-dependent people.

Constitutional and Statutory Anchors

Conservation rests on a constitutional and statutory base that UPSC links back to this chapter. Article 48A (a Directive Principle) directs the State to protect the environment, forests and wildlife, while Article 51A(g) makes it a Fundamental Duty of every citizen. Protected areas themselves flow from the Wildlife (Protection) Act, 1972.

  • Article 48A: DPSP - State to protect and improve environment, forests and wildlife.
  • Article 51A(g): Fundamental Duty of citizens toward the natural environment.
  • Wildlife (Protection) Act, 1972: legal basis for sanctuaries and national parks; poaching is punishable.
  • 42nd Amendment (1976) added these articles and moved forests and wildlife to the Concurrent List.

Key terms

Deforestation
Clearing of forests to use the land for other purposes such as farming, building or fuel.
Desertification
Gradual conversion of fertile land into desert as topsoil and humus are lost.
Biodiversity
Variety of organisms in an area, their interrelationships and their relationship with the environment.
Flora and Fauna
The plants (flora) and animals (fauna) found in a particular area.
Endemic species
Species found exclusively in one area and nowhere else naturally.
Endangered species
Species whose numbers are diminishing to a level that risks extinction.
Species
A group of populations capable of interbreeding to produce fertile offspring.
Ecosystem
All plants, animals and microorganisms of an area plus non-living parts like climate, soil and river deltas.
Biosphere
The part of the earth in which living organisms exist or which supports life.
Migration
Yearly movement of a species to another habitat for a specific purpose such as breeding.

Must-know facts exam-ready

  • Satpura National Park is the first Reserve Forest of India and holds the finest Indian teak.
  • Pachmarhi Biosphere Reserve (Madhya Pradesh, Satpura range) = 1 national park (Satpura) + 2 wildlife sanctuaries (Bori and Pachmarhi).
  • India has more than 100 National Parks.
  • 55 rock shelters with prehistoric rock paintings have been identified in Pachmarhi Biosphere Reserve.
  • Red Data Book is maintained internationally by the IUCN; India keeps its own for Indian species.
  • Project Tiger was launched in 1973 to ensure tiger survival; it is administered today by the NTCA.
  • One tonne of paper takes 17 full-grown trees; paper can be recycled 5-7 times.
  • Forest (Conservation) Act, 1980 conserves natural forests while meeting the needs of forest-dependent people.
  • Wildlife (Protection) Act, 1972 is the legal basis for sanctuaries and national parks; poaching is punishable by law.
  • Article 48A (DPSP) and Article 51A(g) (Fundamental Duty) cover protection of environment, forests and wildlife.
  • Endemic fauna of Pachmarhi: Indian giant squirrel, bison, flying squirrel; endemic flora: sal and wild mango.
  • A Biosphere Reserve is the largest protected unit and may contain national parks and sanctuaries within it.

Timeline

  1. 1972Wildlife (Protection) Act enacted - framework for sanctuaries and national parks; poaching banned.
  2. 1973Project Tiger launched for tiger conservation.
  3. 197642nd Amendment added Articles 48A and 51A(g) and moved forests and wildlife to the Concurrent List.
  4. 1980Forest (Conservation) Act enacted to conserve natural forests.

Memory tricks remember it for good

Sanctuary -> Park -> Reserve = SOME -> NONE -> TRIBAL
Wildlife Sanctuary allows SOME human activity; National Park allows NONE; Biosphere Reserve also protects TRIBAL/traditional life and can hold the other two.
💡 Recall the three protected-area tiers and the human use each permits.
Pachmarhi = S-B-P
Satpura National Park + Bori Sanctuary + Pachmarhi Sanctuary (one park, two sanctuaries).
💡 Recall exactly what the Pachmarhi Biosphere Reserve contains.
FRED-G (effects of deforestation)
Floods (low infiltration), Rainfall falls, Erosion/desertification, Droughts, Global warming (more CO2, less groundwater).
💡 Recall the chain of deforestation consequences.
Endemic = Exclusive place; Endangered = End is near
Endemic means found Exclusively in one place; Endangered means near the End (extinction).
💡 Stop confusing endemic with endangered.
17 down, 5-7 around
17 trees make one tonne of paper; paper can be recycled 5-7 times.
💡 Recall both paper figures together.

Traps to avoid

  • Endemic is not endangered: endemic = restricted distribution (may be locally abundant); endangered = near extinction.
  • Sanctuary vs National Park: sanctuaries permit limited human activity (grazing, firewood, medicinal plants); national parks prohibit it and are stricter.
  • Biosphere Reserve is the LARGEST, not the smallest - it can contain national parks and sanctuaries and uniquely protects tribal/traditional life.
  • Red Data Book is maintained internationally by IUCN (not WWF or UNEP); India also keeps its own.
  • Reforestation is not afforestation: reforestation restocks a destroyed forest (same species, at least as many as cut), not planting where forest never existed.
  • Deforestation reduces rainfall AND causes floods at once - less rainfall via a disturbed water cycle, floods via reduced infiltration (a classic assertion-reason trap).

Exam focus

🧠 Prelims angles

  • Differentiating wildlife sanctuary, national park and biosphere reserve by scope and permitted human activity.
  • Red Data Book and the body that maintains it (IUCN); endangered versus endemic species.
  • Project Tiger - objective, year (1973) and nodal body (NTCA); tiger reserves.
  • Pachmarhi Biosphere Reserve - location and components; Satpura as the first Reserve Forest of India.
  • Legal/constitutional hooks: Article 48A, Article 51A(g), Wildlife (Protection) Act 1972, Forest (Conservation) Act 1980.
  • Concept terms: desertification, infiltration, migration, species and ecosystem components.

✍️ Mains angles GS-III

  • Deforestation as a driver of climate change, floods and desertification - examine the cause-effect chain.Trace fewer trees -> CO2 rise/global warming -> disturbed water cycle -> droughts; and soil erosion -> desertification; reduced infiltration -> floods.
  • Are protected areas alone enough to conserve India's biodiversity?Balance the sanctuary/national park/biosphere reserve framework against encroachment, and argue for people-centric conservation using the biosphere reserve's protection of tribal life.
  • Constitutional and statutory framework for wildlife conservation in India.Anchor on Article 48A and 51A(g), Wildlife (Protection) Act 1972 and Forest (Conservation) Act 1980, with Project Tiger/NTCA as an implementation example.
Practice Science & Technology questions from this syllabus →

Last-minute revision tick as you recall

  • Deforestation = clearing forests; causes natural (fires, droughts) + man-made (farming, building, fuel).
  • Effects: more CO2/global warming, higher temperature, soil erosion -> desertification, lower groundwater, floods + droughts.
  • Three tiers: Sanctuary (some activity) < National Park (no activity) < Biosphere Reserve (largest, plus tribal life).
  • Pachmarhi BR = Satpura NP + Bori & Pachmarhi sanctuaries (MP); Satpura = first Reserve Forest of India.
  • Endemic = found only here; Endangered = near extinction; Red Data Book (IUCN) records endangered.
  • Project Tiger - 1973, now under NTCA - for tiger survival.
  • Paper: 17 trees per tonne; recycle 5-7 times; save, reuse, recycle.
  • Reforestation = replant at least as many trees as cut, same species.
  • Legal anchors: Art 48A and 51A(g), Wildlife (Protection) Act 1972, Forest (Conservation) Act 1980.

Distilled from NCERT Class 8 · Science (Class 8) for UPSC. Always cross-check facts with the original NCERT.