CBSE Grade-12 Biology | 13. BIODIVERSITY AND CONSERVATION by Pavan | Learn Smarter
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13. BIODIVERSITY AND CONSERVATION

13. BIODIVERSITY AND CONSERVATION

The content dives into biodiversity, highlighting its various components—genetic, species, and ecological diversity—and discussing the critical need for conservation due to the alarming rates of species loss driven by human activities. It describes the patterns of biodiversity distribution, particularly the greater species diversity in tropical regions, and emphasizes the importance of biodiversity for ecosystem functionality and survival. Effective conservation strategies are outlined, stressing both in situ and ex situ methods to protect the rich biological heritage of Earth.

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  1. 13
    Biodiversity And Conservation

    This section highlights the diversity of life on Earth and the critical need...

  2. 13.1
    Biodiversity

    Biodiversity encompasses the variety of life on Earth, highlighting the...

  3. 13.1.1
    How Many Species Are There On Earth And How Many In India?

    This section discusses the estimated number of species on Earth and in...

  4. 13.1.2
    Patterns Of Biodiversity

    Species diversity is notably higher in tropical regions and decreases toward...

  5. 13.1.2.1
    Latitudinal Gradients

    This section explores the patterns of biodiversity, emphasizing the...

  6. 13.1.2.2
    Species-Area Relationships

    Species richness increases with area, following a predictable relationship.

  7. 13.1.3
    The Importance Of Species Diversity To The Ecosystem

    Species diversity is crucial for ecosystem stability and health.

  8. 13.1.4
    Loss Of Biodiversity

    This section discusses the alarming rates of biodiversity loss attributed to...

  9. 13.2
    Biodiversity Conservation

    This section focuses on the importance of biodiversity conservation and the...

  10. 13.2.1
    Why Should We Conserve Biodiversity?

    Conserving biodiversity is essential for economic, ecological, and ethical reasons.

  11. 13.2.2
    How Do We Conserve Biodiversity?

    Biodiversity can be conserved through both in situ and ex situ approaches,...

  12. 13.2.2.1
    In Situ Conservation

    In situ conservation refers to the conservation of species in their natural...

  13. 13.2.2.2
    Ex Situ Conservation

    Ex situ conservation is a critical approach to protect endangered plants and...

  14. 13.3

    This section provides an overview of biodiversity, its significance,...

  15. 13.4

    This section contains a series of exercises designed to reinforce...

What we have learnt

  • Biodiversity encompasses genetic, species, and ecological diversity.
  • Tropical regions host the highest levels of species richness.
  • Human activities are the primary drivers of biodiversity loss.

Key Concepts

-- Biodiversity
The variety of life forms on Earth at all levels of biological organization.
-- In situ Conservation
The preservation of ecosystems and their native species in their natural habitats.
-- Ex situ Conservation
The preservation of components of biodiversity outside their natural habitats.
-- Biodiversity Hotspots
Areas that are rich in species but also threatened by human activities, requiring urgent conservation efforts.

Additional Learning Materials

Supplementary resources to enhance your learning experience.