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Biology Section 5-2
Terms in this set (8)
A factor that causes population growth to decrease.
Density-Dependent Limiting Factor
Limiting factor that depends on population size.
When do density-dependent factors become limiting?
Only when the population density (# of individuals) reaches a certain level.
When do density-dependent factors operate most strongly?
When a population is large and dense.
Four density-dependent limiting factors
1) Unusual weather
2) Natural disasters
3) Seasonal cycles
4) Human activities
How are parasites like predators?
Because they take the nourishment from the host they are inhabiting and cause it death or disease.
Density-independent limiting factors
A limiting factor that affects all populations in similar ways, regardless of population size.
The characteristic response in the population size of many species to a density-INdependent limiting factor.
A crash in population size.
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