Population Growth and Decline A PowerPoint Presentation by Mr. Jackson! BCHS FACTORS OF POPULATIONS Four factors determine the size of a population at any given time. The factors are; Death Rate Migration Birth Rate Emigration Wow this sounds interesting!
Population Growth and Decline
A PowerPoint Presentation by Mr. Jackson!
FACTORS OF POPULATIONS
Wow this sounds
Remember gang, population is the
number of individuals living
in the same space at the same time!
The number of individuals that die within a specific time is known as the death rate.
Migration of organisms that increase the population is
known as immigration.
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to see you
Birthrate is the number of offspring produced by
the population over a period of time.
Birth rate can be affected by:
These guys are
all wet. I’m outa here!
Departures of animals from the regular population
is known a Emigration.
Populations are limited by the the following influences:
Abiotic Factors - Are the nonliving influences on populations
such as Water, Matter and Weather.
Biotic Factors - Are the ways living organisms might affect
the size of a population, such as predators and parasites
The relationship between predator and
prey is know as predation.
For a movie of a octopus eating a crab check here
For a close of Close up of a crocodile and a jaguar.
A cool animation of a great white shark swimming,
Animals naturally compete for limited biotic and
To find more information click on the button
It’s all coming together
To review the concepts click on the term
Predators consume other organisms for food energy
Humans are one of the few organisms that changes the environment
to meet their needs. Can you list three ways we have done this?