ACTIVITY
BIODIVERSITY
MODULE 6
What is
BIODIVERSITY?
What is
BIODIVERSITY?
refers to the variety of life on
Earth, within and between all species of
animals, plants, in the context of the
ecosystems where they live.
LEVeLs of BIODIVERSITY
1 2 3
LEVeLs of BIODIVERSITY
GENETIC SPECIES
1 2 3
ECOSYSTEM
1
refers to the differences in the genetic make-up of a distinct
species and to the genetic variations within a single species. It
concerns DNA (or RNA) sequences.
GENETIC
DIVERSITY
organisms adapt to their
environment in order to
survive
2
- simplest and most common measure of biodiversity using the
number of different species that live within a region as the
parameter.
Species
Diversity
ENDEMIC
SPECIES
- one that is found only in a specific
region and not anywhere else in the world.
Speciesrichnessonly
considersthenumberofdifferentspeciesin
anecosystem,nottheirdistribution.
3
- the variety of ecosystems, by their nature and number, where
living species interact with their environment and with each other.
ECOSYSTEM
Diversity
Aquatic
pond
lake
river
oceanfloor
Marine
openmarine
coralreef
estuary
mangrove
rainforest desert
grassland
Terrestrial
tundra taiga
deciduousforest
- when an ecosystem has only one prominent species and
has very low biodiversity.
MONOCULTURE
HIGHBIODIVERSITY LOWBIODIVERSITY
THREATS TO
BIODIVERSITY
- is a natural event describing the disappearance of species from
the face of Earth when the last individual dies.
EXTINCTION
- on its way to being extinct. If the frequencies are at mid-levels
but the rate of reproduction is quite low.
ENDANGERED
THREATENED
DEFORESTATION
- clearing of forest by cutting down or removing
trees in which the land will then be used for
agricultural expansion, logging, road building
and urbanization (e.g., building resorts or
subdivisions).
MINING
- the process of extracting useful materials
from the earth. Some examples of substances
that are mined include coal, gold, or iron ore.
Iron ore is the material from which the metal
iron is produced.
ILLEGAL
HUNTING/POACHING
- hunting animals for food, as pets, or for fur
and hide.
Introduction of
exotic species
- this plays a part in changing the ecosystems
of a local environment, often displacing the
original or native species.
Anexoticspecies
isanalienorganismlivingoutsideitsnativedistributionrange.
DESTRUCTIVE
FISHING
- This includes illegal fishing methods such as
dynamite fishing, cyanide fishing, and muro-
ami.
WHY IS
BIODIVERSITY
IMPORTANT?
1
2
3
4
5
6
INTERDEPENDENCE
STABILITY
ECOLOGICAL
SERVICES
ECONOMIC VALUE
HOW CAN WE
CONSERVE
BIODIVERSITY?
REFORESTATION
ESTABLISHMENTS
OF SANCTUARIES
SUSTAINABLE USE
OF FOREST
RESOURCES
COMBATING
EXOTIC SPECIES
In your own little
way, what can you
do to conserve
biodiversity?
#LETTHEEARTHBREATHE

GRADE 8 SCIENCE MODULE 6- BIODIVERSITY.pdf