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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!

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Presentation Transcript
slide1
Population Growth and Decline

A PowerPoint Presentation by Mr. Jackson!

BCHS

slide2
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!

slide3
Remember gang, population is the

number of individuals living

in the same space at the same time!

slide4
Death Rate

The number of individuals that die within a specific time is known as the death rate.

slide5
Migration

Migration of organisms that increase the population is

known as immigration.

Hey guys good

to see you

slide6
Birth Rate

Birthrate is the number of offspring produced by

the population over a period of time.

Birth rate can be affected by:

  • Nutrition
  • Environment
  • Density of population
slide7
Emigration

These guys are

all wet. I’m outa here!

Departures of animals from the regular population

is known a Emigration.

slide8
Limiting Factors

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

slide9
Predation

The relationship between predator and

prey is know as predation.

For a movie of a octopus eating a crab check here

http://animalpicturesarchive.com/animal/AnimMovie/boct07tv.html

For a close of Close up of a crocodile and a jaguar.

http://animalpicturesarchive.com/animal/AnimMovie/clos00tv.html

A cool animation of a great white shark swimming,

http://animalpicturesarchive.com/animal/AnimMovie/sharks.html

slide10
Competition

Animals naturally compete for limited biotic and

abiotic resources.

To find more information click on the button

Reproduction

Predators

Next

Human

Impact

Parasites

slide12
To Conclude

To review the concepts click on the term

Factors of

populations

Competition

Limiting

factors

slide13
Predators

Predators consume other organisms for food energy

slide14
Parasites
  • These organisms live off others in different ways
  • Parasitism
  • Mutualisism
  • Commentialisim
slide15
Human Impact

Humans are one of the few organisms that changes the environment

to meet their needs. Can you list three ways we have done this?

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