1. Populations
Unit 10 - Lesson 2 Notes

2. Competition
Competition – two or more organisms seek the same resource at the same time.

3. Competition
Competition for food, living space, or other resources can limit the population. (limiting factors)
Competition is usually most intense between members of the same species.

4. Population Size
Population size – indicates whether a population is healthy and growing.
Population density – the size of a population that occupies a specific area.

5. Population Density

7. Population Size Two ways to measure the size of a wildlife population
Trap-Mark-Release method
Sample count method

9. Population Size Elements that affect population size
Limiting factors – any living or nonliving feature that restricts the number of individuals in a population.

11. Population Explosion Population Size
Carrying capacity – the largest number of individuals of one species that an ecosystem can support.
Population
Explosion

12. Number of Mice Time in Days 10 20 30 40 50 60 70 80 90 100 110 120 130
Number of Mice
Time in Days

13. Population Size
Biotic potential – the maximum number of offspring that parent organisms can produce.
Birth and death rates
Movement of organisms into or out of an area (migration).

17. Population Size
Exponential growth – the larger a population becomes, the faster it grows.