Density-dependent factors include competition, predation, parasitism, and disease. Density-independent factors include natural disasters, temperature, human activity, and biological and physical characteristics of the organism.
What are the factors that affect population?
Population growth is based on four fundamental factors: birth rate, death rate, immigration and emigration.
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 main factors that affect 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.
What are the 6 factors that affect population size?
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 factors cause an increase in population?
The two factors that increase the size of a population are natality, which is the number of individuals that are added to the population over a period of time due to reproduction, and immigration, which is the migration of an individual into a place.
What factors decrease population growth?
Factors that decrease population growth can be defined as environmental stress including limitations in food, predation, and other density-dependant factors (Sibley & Hone 2002). However, many sources of environmental stress affect population growth, irrespective of the density of the population.
How does climate affect population?
First, older people are physically more vulnerable to extreme heat, so population aging could exacerbate increases in heat-stress mortality brought on by climate change. Higher temperatures also exacerbate outdoor air pollution such as ozone, which also disproportionately affects older people.
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).
Factors that influence human population growth include: Healthcare/access to health care/medical technology/ability to fight or prevent disease. Availability of birth control/availability of family planning education/use of birth control. Political and/or economic stability/government stability/war.