Quick Answer: What are the factors of population ecology?

Biological factors include interspecific interactions like predation, competition, parasitism, and mutualism, as well as disease. Non-biological factors are environmental variables like temperature, precipitation, disturbance, pollution, salinity, and pH.

What factors affect population ecology?

Factors Affecting Population Size

  • Abiotic Factors. …
  • Seasons. …
  • Food Supply. …
  • Interspecific Competition. …
  • Intraspecific Competition. …
  • Predation. …
  • Parasitism and Disease.

What are the 4 factors of population?

Population growth is based on four fundamental factors: birth rate, death rate, immigration and emigration.

What are the factors of population?

Factors influencing population growth

  • Economic development. …
  • Education. …
  • Quality of children. …
  • Welfare payments/State pensions. …
  • Social and cultural factors. …
  • Availability of family planning. …
  • Female labour market participation. …
  • Death rates – Level of medical provision.

What 3 factors describe a population?

Three primary factors account for population change, or how much a population is increasing or decreasing. These factors are birth rate, death rate, and migration.

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What is the example of population ecology?

Key terms

Term Meaning
Population A group of individuals that belong in the same species and live in the same area; for example, the stray cats of New York City
Population ecology The ecological study of how biotic (living) and abiotic (non-living) factors influence the density, dispersion, and size of a population

What are the five factors that affect population?


  • Population growth rate is affected by birth rates, death rates, immigration, and emigration.
  • If a population is given unlimited amounts of food, moisture, and oxygen, and other environmental factors, it will show exponential growth.

What are the three causal factors of population change?

The three main causes of population change

  • Births – usually measured using the birth rate (number of live births per 1,000 of the population per year).
  • Deaths – usually measured using the death rate (number of deaths per 1,000 of the population per year).
  • Migration – the movement of people in and out of an area.

What are the factors affecting population dynamics?

After all, population change is determined ultimately by only four factors: birth, death, immigration, and emigration. This apparent simplicity is deceptive. It is easy to underestimate the complexity of biotic and abiotic interactions in the natural world that can influence these four population parameters.

What are the 4 factors that determine population size and how does each affect the population?

The four factors that determine population size are birth rate, death rate, emigration, and immigration.

What are examples of limiting factors?

Some examples of limiting factors are biotic, like food, mates, and competition with other organisms for resources. Others are abiotic, like space, temperature, altitude, and amount of sunlight available in an environment. Limiting factors are usually expressed as a lack of a particular resource.

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What is the main factor affecting the population growth?

The two main factors affecting population growth are the birth rate (b) and death rate (d). Population growth may also be affected by people coming into the population from somewhere else (immigration, i) or leaving the population for another area (emigration, e).

What are the factors affecting population change explain?

The are various factors that affect the population change. They are birth, migration, and death. In this note, we discuss death and migration. Death decreases the population while migration increases or decreases the population of the certain areas.

What do you mean by population ecology?

population ecology, study of the processes that affect the distribution and abundance of animal and plant populations. … For example, plants or animals occupying islands have a geographic range defined by the perimeter of the island.

What are the four factors that affect population size in an ecosystem?

a natural population in which all four factors that affect population size (death rate, birthrate, immigration, and emigration) are functioning Although there is variation among species, female ducks lay about 10 eggs per nesting attempt.

What are the 3 types of population?

Individuals of a population can be distributed in one of three basic patterns: uniform, random, or clumped.