Population Dynamics
Population Parameters
- Factors that affect the size/density of a population
1. natality/recruitment Causes an increase in the number of
2. immigration individuals in a population
3. growth of individuals -> causes an increase in biomass
4. mortality Causes a decrease in the number of
5. emigration individuals in a population
Population Increase
-the reproductive potential of the population
-the carrying capacity of the environment which determines the
number of organisms the environment can support
Natality:
Percentage increase in size of a population per unit time
The number of live births per unit time in animal populations.
Different Reproductive Strategies
K-Strategy
majority die as adults
small number of offspring are produced
low juvenile mortality rate
parental care occurs
many individuals survive and reach maximum life span
offspring are large
Climax Community/Species : ecological community in which population
remains stable and exist in balance with each other and their environment
( final stage of succession )
Type 1 survivorship curve -> seen in higher vertebrates – most mammals
and birds
Population Parameters
- Factors that affect the size/density of a population
1. natality/recruitment Causes an increase in the number of
2. immigration individuals in a population
3. growth of individuals -> causes an increase in biomass
4. mortality Causes a decrease in the number of
5. emigration individuals in a population
Population Increase
-the reproductive potential of the population
-the carrying capacity of the environment which determines the
number of organisms the environment can support
Natality:
Percentage increase in size of a population per unit time
The number of live births per unit time in animal populations.
Different Reproductive Strategies
K-Strategy
majority die as adults
small number of offspring are produced
low juvenile mortality rate
parental care occurs
many individuals survive and reach maximum life span
offspring are large
Climax Community/Species : ecological community in which population
remains stable and exist in balance with each other and their environment
( final stage of succession )
Type 1 survivorship curve -> seen in higher vertebrates – most mammals
and birds
