Population Growth is the actual addition or increase in the existing population during a specific period. It refers to the change in population size in a given period. Simply put, it is the increase in the total number of humans on this planet.
We all know that the world population is not stationary; it changes every minute. As of now, 278 people take birth every minute, whereas 106 people die every minute. So, there is a constant change in population due to various reasons, including birth rate, death rate and relocation of people for various reasons like generating better income or better lifestyle.
What is Population?
Population is the total number of people in a particular area or region. One widely used way of determining the population is conducting the census.
In this post, we are going to discuss the differences between population growth and population change.
Content: Population Growth Vs Population Change
- Comparison Chart
- What is Population Growth?
- What is Population Change?
- Key Differences
|Basis for Comparison
|Population Growth refers to the rise in the total number of individuals in the population.
|Population Change refers to the change in total number of people in a country during a specific period.
|What does it depict?
|Increase in the number of people, in the region, in a given period.
|Increase or decrease in the number of people in the region in a given period.
|Absolute and Percentage terms
|Addition in the total number of people
|Rise in population over time.
|Changes in the composition of the population like age structure, sex ratio, literacy rate and occupational structure.
|Natural Increase and Immigration
|Natural Increase, Immigration and Emigration
What is Population Growth?
Population Growth refers to the growth in the number of residents of a country during a particular period. The reason for the rise in population is not just because of the increasing birth rate but also because of a decreasing death rate. It can be measured at:
- Neighbourhood level
- Country level
- Global level
Further, the population growth can be:
Positive Population Growth
The positive growth rate is when measuring between the two points in time; the birth rate is more than the death rate, and also when people migrate permanently to a country from another country.
Negative Population Growth
Factors Affecting Population Growth
- Fertility Rate: Total Number of births per thousand women are expected to undergo in their whole life.
- Life Expectancy: It is the average length of time that a human being survives.
- Net Immigration Level: The actual change in population from people moving in and out of the nation.
What is Population Growth Rate?
It is the rate at which the number of new individuals increases in a population in a certain period. It can be presented in absolute terms or percentage terms.
Absolute numbers can be obtained by deducting the earlier year population from the later year. This number will tell you the exact rise in the population over the years.
On the other hand, the percentage change in population, for example, a rate of increase of 1 per cent per annum, indicates an increase of 1 person per 100 persons in the base population. This is what we call the annual growth rate. The three main reasons behind population change are higher fertility rates, a growing older population and migration.
- Exponential Growth: When the growth in population occurs rapidly with the passage of time.
- Logistic Growth: A type of growth in population that slows down with time.
What is Population Change?
Population Change is the difference in the population size between the beginning and the end of a given period in a specific area. It indicates the difference in population size between two consecutive years. It is based on the following:
- Natural population change: The total number of live births less the total number of deaths.
- Net migration: Difference between immigrants less emigrants. Immigrants are those who move to live permanently in a foreign nation, whereas emigrants are those who leave their own country permanently to settle in another. This means that an emigrant in one country is an immigrant in another.
Further, population change in a specific region or country indicates economic development, social well-being and historical and cultural background.
Do you know?
There has been more than ten times increase in the human population in the past 500 years. Further, it increased four times in the twentieth century itself.
- Birth Rate: Birth Rate can be calculated as the number of live births that occur in a year per thousand of the population. It is the primary reason for the growing population.
- Death Rate: The death rate is the number of deaths in a country in a year per thousand of the population. The decline in growth rate also leads to growth in population.
- Migration: People shifting or moving from one place to another also leads to change in population. It is the movement of population across regions and territories. The place of origin, i.e., where they come from and the place of destination, i.e., where they move. It can be permanent or temporary migration.
Also Read: Difference Between Birth Rate and Death Rate
What is Positive Population Change?
If the outcome of net migration plus live births less death is positive, then there is positive population change.
Rate of Population Change
The rate of change in population is based on the rate at which births and deaths occur, the availability of resources and potential competition for these resources. Hence, the population changes constantly because of the environment, food sources, disease and migration.
There are times when the population changes slowly when the environmental factors are stable. While other times there is an increase or decrease in population over a short period. The rate of population change explains how fast the population is increasing or decreasing in a country over a given period.
Key Differences Between Population Growth and Population Change
- Population Growth means the rise in the number of people in a given region during a particular period. On the other hand, population change implies the change in the population’s composition, distribution and size during a particular period.
- While population growth shows the increase in the number of people in a given area in a specific period, population change shows the increase or decrease in the number of people in a given area in a specific period.
- Population Growth can be expressed in absolute figures and also in percentage terms. As against, population change can be expressed as the addition in the total number of people.
- Population Growth reflects the rise in population of a region over a period of time. In contrast, population change is an indicator of the changes in the composition of the population, including age structure, sex ratio, literacy rate and occupational structure.
- Population Growth is a result of natural increase and immigration. Conversely, population change is caused by natural increase and net immigration.
Above all, one must note that without population change, population growth is not possible. Also, population growth is always due to the change in population size. Further, the economic growth of a country is directly associated with the population growth.