Term
| Density dependent limiting factors (biotic) |
|
Definition
Internal:
limited food supply
lack of territory
External:
Predation
Disease |
|
|
Term
|
Definition
population grows exponentially and eventually balances out
the balance is caused by biotic factors |
|
|
Term
|
Definition
population grows exponentially and suddenly collapses (overshoot)
overshoot is usually caused by abiotic factors
usually occur in microbes, fish, small animals |
|
|
Term
| Density independent limiting factors (abiotic) |
|
Definition
· Climate
· Weather
· Volcanic eruptions
· Floods |
|
|
Term
|
Definition
· Long life
· Slower growth
· Late maturity
· Fewer large offspring
· High parental care and protection
· High investment in individual offspring
· Adapted to stable environment
· Later stages of succession
· Niche specialists
· Predators
· Regulated mainly by internal factors
· Higher trophic level
· Trees, albatrosses, humans |
|
|
Term
|
Definition
· Short life
· Rapid growth
· Early maturity
· Many small offspring
· Little parental care or protection
· Little investment in individual offspring
· Adapted to unstable environment
· Pioneers, colonizers
· Niche generalists
· Prey
· Regulated mainly by external factors
· Lower trophic level
· Examples: annual plants, flour beetles, bacteria |
|
|
Term
|
Definition
| number of births/deaths per 1000 individuals |
|
|
Term
|
Definition
crude birth rate - crude birth rate / 10
excludes migration |
|
|
Term
|
Definition
| avg # of children each woman has during her lifetime |
|
|
Term
|
Definition
| # of births per 1000 women of childbearing age |
|
|
