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Density-independent factors can affect a population of organisms no matter how small or large the population may be. Examples of Density-Independent Factors. Most density-independent factors are abiotic, or nonliving. Some commonly used examples include temperature, floods, and pollution. How could temperature be a factor in determining the density of a population? Imagine a heavily forested area that is home to a population of mosquitoes.
In the context of populations, a limiting factor is a factor that causes population growth to decrease. Density-Dependent Factors Density-Dependent Factors A limiting factor that depends on population size is called a density-dependent limiting factor. Density-Dependent Factors Density-dependent limiting factors include: â¢ competition â¢ predation â¢ parasitism â¢ disease Density-Dependent Factors Density-dependent factors operate only when the population density reaches a certain level. These factors operate most strongly when a population is large and dense. They do not affect small, scattered populations as greatly. Density-Dependent Factors Competition When populations become crowded, organisms compete for food, water space, sunlight and other essentials. Competition among members of the same species is a density-dependent limiting factor. Density ...