Transcript Power point population

Population
Definition
• It is the number of members of the same
species in a given area.
How to calculate population.
• Simply count the number of species in a given
area.
What is the
population of cows
in this territory?
9
What is the
population of
rabbits?
5
• Immigration is the action of a species going in
an area.
POPULATION
• Emigration is the action of a species exiting an
area.
POPULATION
Factors that influence a population
- The Climate
-- The Quantity of preys
-The quantity of predators
-Diseases
The Cycle of Population
• In a given period of time, the number of species in a
population varies: it increases then decreases in a
cycle.