CBSE Class 12 Biology Biodiversity and Conservation Concept Map

This CBSE Class 12 Biology concept map for Chapter 15, Biodiversity and Conservation, shows how biodiversity is divided into ecological, species and genetic levels, how patterns of biodiversity are studied, why biodiversity is lost, and the reasons for and approaches to conserving it.

Chapter 15: Biodiversity and Conservation (Concept Map)

Biodiversity and Conservation - Central Idea
The concept map starts with the central topic, Biodiversity and Conservation, and branches into four main areas: levels of biodiversity, patterns of biodiversity, conservation of biodiversity, and loss of biodiversity.

Levels of Biodiversity

1. Ecological diversity leads to Global Biodiversity.
2. Species diversity has two components: Species richness and Species evenness.
3. Genetic diversity is the third level of biodiversity.

Patterns of Biodiversity

1. Latitudinal Gradient
2. Species Area Relationship

Conservation of Biodiversity

Reasons for Conservation:
1. Narrowly Utilitarian
2. Broad
3. Ethical

Approaches to Conservation:
1. In-situ conservation (conservation within the natural habitat)
2. Ex-situ conservation (conservation outside the natural habitat)

International Efforts:
1. Earth Summit (the map shows it as "Earth" and "World summit")

Loss of Biodiversity

The loss of biodiversity happens through a chain of causes, shown in this order:
1. Habitat loss and fragmentation
2. Over exploitation
3. Invasion of Alien species
4. Co extinction (extinction of one species leads to the extinction of another species dependent on it)