3.5 - Population size and ecosystems Flashcards
1
Q
Population
A
The number of individuals of a species in a particular area
2
Q
Population dynamics
A
Study of the changes in populations over time
3
Q
Factors determining population size
A
- Birth rates (natality)
- Death rates (mortality)
- Immigration
- Emigration
4
Q
Birth rates
A
Measure of reproduction rate in a population. Usually given as number of births per year per 1000 people
5
Q
Death rates
A
Number of deaths per year per 100 people in a population
6
Q
Types of migration
A
- Immigration
- Emigration
7
Q
Immigration
A
Net movement of individuals into an area
8
Q
Emigration
A
Net movement of individuals out of an area
9
Q
Who studied populations of microbes
A
Gause - grew paramecium
10
Q
A
