Density Dependent
- Competition for resources
- Predation
- Disease and parasites
- Intraspecific competition
- Limited nesting sites
Density Independent
- Natural disasters (such as floods, hurricanes, and wildfires)
- Extreme temperatures
- Drought
- Pollution
- Habitat destruction
Nearly all populations will tend to grow exponentially as long as there are resources available. After an initial period of exponential growth, a population will encounter one or more limiting factors that will cause the exponential growth to stop. The population enters a slower growth phase and may stabilize at a fairly constant population size or in some cases, may decline. Limiting factors can be classified as either density-dependent or density-independent.
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Density Dependent Density Independent
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