What is a density independent factor in controlling a population apex?
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).
These density-independent factors include food or nutrient limitation, pollutants in the environment, and climate extremes, including seasonal cycles such as monsoons. In addition, catastrophic factors can also impact population growth, such as fires and hurricanes.
The correct answer is (D) Severe weather patterns. Density-independent population growth factors are not affected by the population density.
A density-dependent factor is a factor whose effects on the size or growth of a population vary with the population density. Density-dependent factors typically involve biotic factors, such as the availability of food, parasitism, predation, disease, and migration.
Density-independent factors: natural disasters, seasonal cycles, unusual weather, and human activity.
Density-independent factors affect per capita growth rate independent of population density. Examples include natural disasters like forest fires.
Physical factors that affect population density include water supply, climate, relief (shape of the land), vegetation, soils and availability of natural resources and energy. Human factors that affect population density include social, political and economic factors.
Generally natural calamities, climate changes, and environmental stresses are the factors of density-independent factors. The predation belongs to the density-dependent factor because it does not occur via climatic changes. Therefore, the correct answer is C.) predation.
Density-dependent regulation
Most density-dependent factors, which are biological in nature (biotic), include predation, inter- and intraspecific competition, accumulation of waste, and diseases such as those caused by parasites. Usually, the denser a population is, the greater its mortality rate.
Density independent factors tend to be abiotic factors, such as storms, floods or harsh winters.
Is temperature a density independent factor?
There are many common density independent factors, such as temperature, natural disasters, and the level of oxygen in the atmosphere. These factors apply to all individuals in a population, regardless of the density.
living space – for instance, the growth of plants is affected by competition for space. Less space could mean less sunlight, less photosynthesis. predation – more prey animals could mean more predators, thus, increased predation. disease – spread of disease is faster in a dense population than small ones.
Density-independent factors are not influenced by a species population size. All species populations in the same ecosystem will be similarly affected, regardless of population size. Factors include: weather, climate and natural disasters.
A disease is a good example of a density-dependent factor. If a population is dense and the individuals live close together, then each individual will have a higher probability of catching the disease than if the individuals had been living farther apart.
There are several common density independent factors, such as natural disasters, temperature, including the oxygen level in the atmosphere. All these factors apply to all the individuals in a population, irrespective of the density.
Which of the following is a density-independent limiting factor? Resource shortages triggered by increasing population size are density-independent limiting factors.
Which of the following is a common cause of density independent growth? Colonizing a new habitat.
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.
Population density is often measured in three different ways. There is arithmetic density, physiological density, and agricultural density.
When demographers attempt to forecast changes in the size of a population, they typically focus on four main factors: fertility rates, mortality rates (life expectancy), the initial age profile of the population (whether it is relatively old or relatively young to begin with) and migration.
Which of the following is an example of a density independent limitation?
The category of density independent limiting factors includes fires, natural disasters (earthquakes, floods, tornados), and the effects of pollution. The chances of dying from any of these limiting factors don't depend on how many individuals are in the population.
Density independent controls are factors that do not depend on how large the population is (ie. its density); the number of individuals currently present in the population does not influence the likelihood of an individual to die from density independent factors.
Answer and Explanation: The correct answer is Flooding.
density- dependent. a factor whose effects on the size or growth of population vary with the population. Factors typically involve biotic factors, such as the availability of food, parasitism, predation, disease, and migration.
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 growth: In a population that is already established, resources begin to become scarce, and competition starts to play a role. We refer to the maximum number of individuals that a habitat can sustain as the carrying capacity of that population.
Answer and Explanation: Density-independent factors are factors that affect the population and are not dependent on the population density. These factors include severe storms, human disturbance, natural disaster, etc.
What limiting factors depend on population density? Density-dependent limiting factors include competition, predation, herbivory, parasitism, disease, and stress from overcrowding.
Plants, Sunlight and Crowding
Plants are also subject to density dependence. Because plants rely on sunlight for much of their energy, their own density directly affects their ability to reproduce.
For many organisms, food is a density dependent factor. At low densities, food is almost always readily available. At high densities, it becomes scarce. As humans become denser on this planet, we will need to develop ways to generate more food in less area to overcome this density dependent factor.
What is an example of density dependent and density independent?
Examples of density dependent factors are food, shelter, predation, competition, and diseases while examples of density independent factors are natural calamities like floods, fires, tornados, droughts, extreme temperatures, and the disturbance of the habitat of living organisms.
- Intraspecific Competition. Intraspecific competition is competition between individuals of the same species for food, space, and other resources. ...
- Interspecific Predation. ...
- Diseases and Parasites. ...
- Social Behaviors.
Density-independent factors are not influenced by a species population size. All species populations in the same ecosystem will be similarly affected, regardless of population size. Factors include: weather, climate and natural disasters.
Generally natural calamities, climate changes, and environmental stresses are the factors of density-independent factors. The predation belongs to the density-dependent factor because it does not occur via climatic changes. Therefore, the correct answer is C.) predation.
Examples of density dependent factors are food, shelter, predation, competition, and diseases while examples of density independent factors are natural calamities like floods, fires, tornados, droughts, extreme temperatures, and the disturbance of the habitat of living organisms.
World Population Growth Over Time
The independent variable is time (in years) plotted on the x-axis and the dependent variable is population (in billions of people) located on the y-axis.
Answer and Explanation: Density-independent factors are factors that affect the population and are not dependent on the population density. These factors include severe storms, human disturbance, natural disaster, etc.
