BIODIVERSITY
REVIEW
• List down the levels of
organization in order.
OBJECTIVE:
– Determine the concept of biodiversity and discuss
the common measures of biodiversity.
Name listing
Form two groups. List
all the names of that
you can see in the
illustration.
Give them 2 minutes
only. The group with
the most number
correct responses
wins.
INTRODUCTION
The term Biodiversity was first
coined by Walter G. Rosen in
1986.
Biodiversity
What does “Bio” means?
Bio =
Biodiversity
What does “Diversity”
means?
Diversity = Variety
CONCEPT AND TYPES OF BIODIVERSITY
Biodiversity is the variety
of life forms on earth and
the essential
interdependence of all
living things.
There are three types of biodiversity
Diversity of Species
Diversity of Ecosystem
Diversity of Genes
BENEFITS OF BIODIVERSITY
Consumptive value:
Food/Drink
Fuel
Medicine
Batter crop varieties
Industrial Material
Non-Consumptive Value:
Recreation
Education and Research
Traditional value
Pollution
Hunting
Global warming and climate
change
Agriculture
Domino effect
REFERENCES
Roy Sovan, Environmental Science, Publishing Syndicate , 2003,
Kolkata.
Dara.S.S., Environmental chemistry and Pollution Control, S.chand
& company Ltd., New Delhi
Schulze Ernst- Detlef, Mooney Harold, Biodiversity and Ecosystem
Function, Springer- Verlag, London
Mohapatra Pradipta Kumar, Textbook of Environmental
Biotechnology, I.K. International pub. House pvt.
Ltd.,2006, New Delhi
Khan. T. I. Global Biodiversity and Environmental Conservation,
Pointer Publishers, 2001, Jaipur
www.eolss.net
www.ibc2010.com
SPECIES DIVERSITY
• Species diversity is a measure of
community complexity. It is a
function of both the number of
• different species in the community
(species richness) and their relative
abundances (species evenness).
SPECIES DIVERSITY
• 1. A forest community with 20
different kinds of trees would have
greater species diversity than a
forest community with only 5 kinds
of trees (assuming that the tree
species were even in abundance in
both cases).
SPECIES DIVERSITY
• A forest community with 20
different kinds of trees in even
abundances would have greater
species diversity than a forest
community with the same number
of species in very uneven
abundances (for instance, with
90%, percent of the trees belonging
to a single species).
TYPES OF SPECIES
• foundation species plays a unique,
essential role in creating and defining
a community. Often, foundation
species act by modifying the
environment so that it can
• support the other organisms that form
the community.
TYPES OF SPECIES
• A keystone species is a species that has a
disproportionately large effect on community
• structure relative to its biomass or abundance.
Keystone species differ from foundation
• species in two main ways: they are more likely
to belong to higher trophic levels (to be
• top predators), and they act in more diverse
ways than foundation species, which tend to
• modify their environment.
• Genetic Diversity-
Refers to the variation
• of genes within species. It
covers distinct
• populations of the same
species. For
• example, different
varieties of fungi, wheat,
• and rice.
• Ecosystem Diversity-
Refers to the
• different biomes, which
are called the
• world’s major
communities and are
• characterized by
adaptations of organisms
in a particular
environment.
INDIVIDUAL ACTIVITY
• Identification: Identify what or who is being referred to in the following
statements. Write the answer on the blank provided.
• __________ 1. It is the number of different species in a particular
community.
• __________ 2. It is a measure of community complexity.
• __________ 3. It refers to the different biomes, which are called the
world’s major communities
• and are characterized by adaptations of organisms in a particular
environment.
• __________ 4. It is a species that has a disproportionately large effect on
community structure
• relative to its biomass or abundance.
• __________ 5. It plays a unique, essential role in creating and defining a
community.
COLLABORATIVE ACTIVITY:
• Work in pairs.
• SEL INTEGRATION: Cognitive Regulation –
Recognizing and resolving problems
• Find an area of trees and determine the tree diversity in that area by
counting the number of trees and the number of different kinds. Write it
below:
• Number of trees: __________ Number of species: __________
Diversity:___________
APPLICATION:
•Biodiversity is a short
term for ____________.
•a. Biological diversity
•b. Biological diversified
•c. Biological diverse
•d. All of the above
•Environments always have
both living and _________.
•a. bio-geochemical cycles
•b. ecosystem
•c. nonliving factors
•d. nutrients
•Biodiversity is the variety
of ________ in each area.
•a. communities
•b. genes
•c. organisms
•d. species
• If you were to take a count of the
diversity of species in your town,
what would you be measuring?
• a. Biodiversity
• b. Genetic diversity
• c. Habitat diversity
• d. Species richness
• A country with many different
types of habitat is said to have a
high degree of what?
• a. Biodiversity
• b. Genetic diversity
• c. Habitat diversity
• d. Species richness
