Measuring diversity will help you understand the classification and diverse types of organisms in the ecosystem.

1. ALIVIE R. ABASCAR
MAED-TSCI I
MEASURING BIODIVERSITY
Biodiversity is the greatest treasure we have…
Its diminishment is to be prevented at all cost.

2. OBJECTIVES
a. Identify the concepts
of biodiversity.
b. Explain the method
that would be used to
analyze the biodiversity
in the area.
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c. Realize the
importance of
biodiversity in daily life
setting.

3. BIODIVERSITY
It is the number and
variety of organisms
found in a specific
region.
For biodiversity to
remain high, diverse
ecosystems need to
remain sustainable.
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4. Figure 3.1A This newly discovered shark “walks” along
the bottom of the ocean in 2006
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Figure 3.1B In 2007, It is one of the species of orchids
found in Vietnam

5. How many species are there on Earth?
Scientists have
identified about 2
million species.
Estimates of the
total number of
species on Earth
range from 5 million
to 100 million
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6. Key Terms
Biodiversityis all
the different kinds of
life you'll find in one
area—the variety of
animals, plants,
fungi, and even
microorganisms like
bacteria that make
up our natural world.
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Protect is to
guard legally from
harm a species
that is listed as
endangered,
threatened, or of
special concern
Biodiversity
hotspots are regions
that contain a high level
of species diversity,
many endemic species
(species not found
anywhere else in the
world) and a significant
number of threatened
or endangered species.

7. How Do Scientists Measure Biodiversity?
CANOPY
FOGGING
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Is an effective way of
collecting information about
the biodiversity of insects.
A low dose of insecticide is
sprayed up into the top of a
tree. When the insects fall,
they are collected on a
large screen, shaped like a
funnel.

8. How Do Scientists Measure Biodiversity?
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A quadrat is a known
square area that is
marked using a pre-
made square of plastic,
or stakes and string. It
can range in size from 1
m2 to 20 m2.
QUADRAT
SAMPLING

9. How Do Scientists Measure Biodiversity?
Transect
Sampling
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It is done using a transect
line. It is usually a rope or
measuring tape that has
been marked at set intervals,
such as every metre. The line
is unrolled within the habitat.
At every interval, the type
and number of species are
recorded

10. How Do Scientists Measure Biodiversity?
Netting
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Fine mesh nets are used to
capture birds and bats in
terrestrial ecosystem, and
fish and other organisms in
aquatic ecosystem.

11. Documenting Biodiversity and Its Distribution
• Museums house many
collections of preserved
specimens, such as the insects
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Figure 3.2 Biological collections housed in the museum
have helped ecologists catalogue Earth’s species.
The Royal Ontario Museum
inToronto
The Canadian Museum
of Nature

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Canada’s Biodiversity
A large country with
many aquatic and
terrestrial
ecosystem, is home
to thousands of
species.
Figure 3.3A
Red Mulberry
Tree
Figure 3.3 B
Peary Caribou

13. It is a place where there is an exceptionally large number of
species in a relatively small area. Hotspots in Canada
include Carolinian Canada and the Leitrim Wetlands, both in
Ontario.
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Hotspots of Biodiversity

14.  most of the biosphere’s diversity hotspots are in the
tropics of South America, Africa, and Asia.
 In tropical East Africa, Lake Malawi is home to
about 1000 species of fish, many of which can
be found only in this lake. Lake Malawi has
about the same area as Lake Erie, which is
home to about 150 fish species.
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Biodiversity in the Tropics

15. Biodiversity Index
• Scientists can calculate the biodiversity index of an ecosystem
using a simple formula. The closer the biodiversity index is to
1, the higher the biodiversity of the ecosystem is.
Materials:
Model ecosystem provided
Procedure:
1. Choose one model ecosystem. Each colour of bead
represents a different species. Count the number of different
species in the ecosystem. Then count the number of individuals
of each species. Calculate the total number of organisms in the
ecosystem.
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16. Biodiversity Index
2. Record your data in a table like the one below.
Biodiversity in Ecosystems
3. Calculate the biodiversity index for each ecosystem.
Divide the number of species in the ecosystem by the
total number of organisms in the ecosystem.
4. Repeat steps 1 to 3 for the remaining ecosystem
models.
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