1. What is population ecology?

2. Population Ecology
the study of how plant and animal populations within a community affect each other
What affect population ecology?
density
age
distribution
growth
competition
predation

3. How does population density affect population ecology?
the measure of how crowded organisms are in their environment
organisms compete for resources, keeping a balance is important
If the population is too high, some organisms will __________.
How does population density
affect population ecology?
die

4. How does age affect population ecology?
a population can be classified by its age
3 groups of age classes are
preproductive – young and have not reproduced
reproductive – in the process of reproducing
postproductive – past the stage of reproducing
To be productive, a community should contain each of these three age groups.
How does age affect
population ecology?

5. affect population ecology?
Distribution
a description of how organisms are distributed within their community
How does distribution
affect population ecology?

6. How does population growth affect population ecology?
increase in the number of organisms who inhabit an area
population growth is determined by
immigration – the act of an organism moving into a habitat
emigration – the act of an organism moving out of a habitat
natality – the production of new individuals in a habitat (birth rate)
mortality – the death rate in a population
How does population growth
affect population ecology?

7. Increasing, Decreasing, or Stays the Same…
# of immigrants > # of emigrants
# of immigrants = # of mortalities
# of natalities < # of mortalities
# of immigrants + # of emigrants = # of natalities + # of mortalities

8. affect population ecology?
Competition
the use of the same resources by different organisms to live
What are the 3 major limiting resources for animals?
food, shelter, and water
What are the 3 major limiting resources for plants?
nutrients, sunlight, and water
How does competition
affect population ecology?

9. affect population ecology?
Predation
one living organism serving as food for another organism
How does predation
affect population ecology?

10. Carrying Capacity
the maximum population size of the species that the environment can sustain indefinitely, given the food, habitat, water and other necessities available in the environment

11. Population Statistics
Predator-Prey Graph
Population Statistics