PPT: Biodiversity | Environment for UPSC CSE PDF Download

 Page 1


B i o d i v e r s i t y
Page 2


B i o d i v e r s i t y
Understanding 
Biodiversity 3 The 
Basics
The foundation of life on our planet exists in 
remarkable variety - from microscopic genes 
to entire ecosystems
Page 3


B i o d i v e r s i t y
Understanding 
Biodiversity 3 The 
Basics
The foundation of life on our planet exists in 
remarkable variety - from microscopic genes 
to entire ecosystems
What is Biodiversity?
The variety of all life forms on Earth:
Diversity within species (genetic)
Diversity between species
Diversity of ecosystems
Term coined by Walter G. Rosen (1980s); 
popularized by biologist Edward O. Wilson
Page 4


B i o d i v e r s i t y
Understanding 
Biodiversity 3 The 
Basics
The foundation of life on our planet exists in 
remarkable variety - from microscopic genes 
to entire ecosystems
What is Biodiversity?
The variety of all life forms on Earth:
Diversity within species (genetic)
Diversity between species
Diversity of ecosystems
Term coined by Walter G. Rosen (1980s); 
popularized by biologist Edward O. Wilson
Levels of Biodiversity
Genetic Diversity
Variation within species
Example: India cultivates 
over 50,000 different rice 
varieties
Species Diversity
Variety of species in a 
region
India alone hosts over 
103,000 animal species
Ecosystem 
Diversity
Range of different habitats 
and communities
Forests, wetlands, deserts, 
mountains, oceans
Page 5


B i o d i v e r s i t y
Understanding 
Biodiversity 3 The 
Basics
The foundation of life on our planet exists in 
remarkable variety - from microscopic genes 
to entire ecosystems
What is Biodiversity?
The variety of all life forms on Earth:
Diversity within species (genetic)
Diversity between species
Diversity of ecosystems
Term coined by Walter G. Rosen (1980s); 
popularized by biologist Edward O. Wilson
Levels of Biodiversity
Genetic Diversity
Variation within species
Example: India cultivates 
over 50,000 different rice 
varieties
Species Diversity
Variety of species in a 
region
India alone hosts over 
103,000 animal species
Ecosystem 
Diversity
Range of different habitats 
and communities
Forests, wetlands, deserts, 
mountains, oceans
Why is Biodiversity Important?
E c o l o g i c a l
Maintains ecosystem stability, productivity, 
and resilience to environmental changes
E c o n o m i c
Provides food, medicine, raw materials, and 
supports millions of livelihoods globally
S c i e n t i f i c
Helps understand evolution and complex 
ecosystem functions
C u l t u r a l
Supports traditional knowledge systems and 
cultural identity of communities