Density-independent factor, also called limiting factor, in ecology, any force that affects the size of a population of living things regardless of the density of the population (the number of individuals per unit area).

Density-dependent factors include competition, predation, parasitism and disease.

• Competition. Habitats are limited by space and resource availability, and can only support up to a certain number of organisms before reaching their carrying capacity.
• Predation.
• Parasitism.
• Disease.

Density-dependent limiting factors include competition, predation, herbivory, parasitism and disease, and stress from overcrowding. Competition is a density-dependent limiting factor.

Density-dependent factor, also called regulating factor, in ecology, any force that affects the size of a population of living things in response to the density of the population (the number of individuals per unit area).

Density-dependent limiting factors cause a population’s per capita growth rate to change—typically, to drop—with increasing population density. Density-independent factors affect per capita growth rate independent of population density. Examples include natural disasters like forest fires.

The examples of density dependent factors include food, disease, predation, space, migration and others. Among the options given, space is the correct, this is due to the fact that the population may experience lack of space with the increase in the size of the population.

Positive density-dependence, density-dependent facilitation, or the Allee effect describes a situation in which population growth is facilitated by increased population density.

1/N dN/dt = r – (r/K) N This is one form of the so-called Logistic Equation for density-dependent population growth.

Density dependent factors include the environmental resources needed by the individuals of a population. Competition for food, water, shelter, etc., results as the population density increases. The survival, health, and reproduction of individuals will be affected if they cannot acquire the basic requirements of life.

The factor A or flooding Density Independent Factors: Density Independent Factors affect populations by the same percentage, regardless of density. Temperature is a major factor This makes an extreme weather event, such as a flood, a density-independent factor.

Density dependent factors are primarily responsible for regulating populations about an average level of abundance. II. Abiotic Factors include such things as Temperature, Humidity, Rainfall, Soil pH, etc.

assumptions correspond to density independence because they imply that the per capita birth and death rates are independent of density. The rate of births is proportional to the number of individ- uals present. The rate of deaths is proportional to the number of individ- uals present.

While oxygen is a density independent factor for most oxygen breathing organisms, it may be a density dependent factor for some. Image an obligate anaerobe bacteria, for instance. Oxygen is toxic to these organisms.

Question 18 (1 point) The death by bubonic plague (caused by a bacteria) of about one-third of Europe’s population during the fourteenth century is a good example of: O a density-independent effect.

It is a variable that stands alone and isn’t changed by the other variables you are trying to measure. For example, someone’s age might be an independent variable. Other factors (such as what they eat, how much they go to school, how much television they watch) aren’t going to change a person’s age.