What is rapid population growth?
7 rows · Rapid population growth, even though at a moderating pace, will continue for some decades. Rapid population growth has serious economic consequences. It encourages inequities in income distribution; it limits rate of growth of gross national product by holding down level of savings and capital investments; it exerts pressure on agricultural production and land; and it creates unemployment problems.
Population growth is the increase in the number of individuals in a population. Global human population growth amounts to around 83 million annually,  or 1. The global population has grown from 1 billion in to 7.
The UN projected population to keep growing, and estimates have put the total population at 8. World human population has been growing since the end of the Black Deatharound the year In some geographies, this has slowed through the process called the demographic transitionwhere many nations with high standards of living have seen a significant slowing of population growth.
This is in direct contrast with less developed contexts, where population growth is still happening. Population growth alongside overconsumption is a key driver of environmental concerns, such as biodiversity loss and climate changedue to resource-intensive human development that exceed planetary boundaries.
World population has been rising continuously since the end of the Black Deatharound the year The most significant increase in the world's population has been since the s, mainly due to medical advancements  and increases in agricultural productivity. Due to its dramatic impact on the human ability to grow food, the Haber processnamed after one of its inventors, the German chemist Fritz Haberserved as the "detonator of the population explosion ", enabling the global population to increase from 1.
Some of the reasons for the "Modern Rise of Population"  were particularly investigated by the British health scientist Thomas McKeown In his publications, McKeown challenged four theories about the population growth:. Although the McKeown thesis has been heavily disputed, recent studies have confirmed the value of his ideas. McKeown had a major influence on many population researchers, such as health economists and Nobel prize winners Robert W. Fogel and Angus Deaton The latter considered McKeown as "the founder of social medicine ".
The "population growth rate" is the rate at which the number of individuals in a population increases in a given time period, expressed as a fraction of the initial population. Specifically, population growth rate refers to the change in population over a unit time period, often expressed as a percentage of the number of individuals in the population at the beginning of that period.
This can be written as the formula, valid for a sufficiently small time interval:. A positive growth rate indicates that the population is increasing, while a negative growth rate indicates that the population is decreasing. A growth ratio of zero indicates that there were the same number of individuals at the beginning and how to write a test plan of the period—a growth rate may be zero even when there are what is rapid growth population changes in the birth ratesdeath ratesimmigration ratesand age distribution between the two times.
A related measure is the net reproduction rate. In the absence of migration, a net reproduction rate of more than 1 indicates that the population of females is increasing, while a net reproduction rate less than one sub-replacement fertility indicates that the population of females is decreasing.
Most populations do not grow exponentially, rather they follow a logistic model. Once the population has reached its carrying capacityit will stabilize and the exponential curve will level off towards the carrying capacity, which is usually when a population has depleted most its natural resources.
The growth of a population can often be modelled by the logistic equation . As it is a separable differential equation, the population may be solved explicitly, producing a logistic function :. Inthe estimated annual growth rate was 1. The annual increase in the number of living humans peaked at Inthe human population increased by 83 million. In some countries the population is decliningespecially in Eastern Europemainly due to low fertility rateshigh death rates and emigration.
Some Western Europe countries might also experience population decline. The United Nations Population Division projects world population to reach The Institute for Health Metrics and Evaluation projects that the global population will peak in at 9.
The fear is that high population numbers are putting further strain on natural resources, food supplies, fuel supplies, employment, housing, etc. For example, the population of Chad has ultimately grown from 6, in to 10, what is rapid growth population further straining its resources.
Population projections are attempts to show how the human population living today will change in the future. From Wikipedia, the free encyclopedia. Increase in the number of individuals in a population. Further information: Total fertility rateEstimates of historical world populationand Population dynamics.
See also: Human overpopulation and Overshoot population. Main article: List of countries by population ldl cholesterol how to lower rate. This section is an excerpt from Projections of population growth [ edit ].
Our World in Data. Retrieved 15 February Retrieved Archived from the original PDF on Archived from the original on 20 December Population Reference Bureau. Retrieved 5 December Making Peace with Nature: A scientific blueprint to tackle the climate, biodiversity and pollution emergencies. Archived from the original on Philosophical Transactions of the Royal Society of London.
Series B, Biological Sciences. Philosophical Transactions of the Royal Society. PMC PMID Goodman, and Kenneth H. Bibcode : Natur. S2CID The Modern Rise of Population. London, UK: Edward Arnold. ISBN Population Studies. JSTOR The Great Escape. Health, wealth, and the origins of inequality. Princeton and Oxford: Princeton University Press. McKeown's views, updated to modern circumstances, are still important today in debates between those who think that health is primarily determined by medical discoveries and medical treatment how to replace a grease zerk those who look to the background social conditions of life.
Campbell Biology. Brief Applied Calculus. Retrieved 4 January Associated Press. July 14, The Guardian. Retrieved December 19, September 14, Bibcode : Sci ISSN Seven News. Retrieved January 2, Deutsche Welle. Retrieved 14 March United Nations. The World Factbook. Retrieved January 10, Institut National de la Statistique. Archived from the original on April 18, Retrieved January 12, Central Intelligence Agency.
Retrieved 5 March Retrieved 12 February Australian Bureau of Statistics website. Commonwealth of Australia. Retrieved 12 April The population estimate shown is automatically calculated daily at UTC and is based on data obtained from the population clock on the date shown in the citation.
Retrieved 25 July Retrieved 29 April
Aug 04, · The main cause of rapid population growth is when there are more births than there are deaths, which is referred to as a natural increase. Other causes of rapid population growth include an increase in food production and distribution, improvement in public health and the elimination of many diseases. An increasing number of individuals are choosing to live healthier lifestyles, which in . Health, Juicebox What is rapid population growth. Rapid Population Growth (RPG) is a state of over population in terms of existing means and resources. When the PGR (population growth rate) is more than 2% and TFR (Total Fertility Rate) is more than per woman, it is known as the condition of RPG.
A rapid growth of offspring in an area, usually resulting in rationing and loss of support supplies. Explain why populations tend not to continue to increase exponentially in an environment: The exponential growth model is based on unlimited resource availability which means that there is no effect depending on density.
There is no competition for resources. Natality and mortality rate do not depend on density. There is a constant growth rate per capita and it is proportional to the population size. A population that exhibits exponential growth model increases in proportion to its size. In the Logistic growth model, the population growth depends on density, the natality and mortality rate depends on the population size, which means that there is no independence between population growth and population density.
When a population grows in a limited space, density rises gradually and eventually affects the multiplication rate. The population's per capita growth rate decreases as population size increases.
The population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.
Explain what is meant by environmental resistance: It refers to the limiting factors. There are factors and conditions that regulate the population growth, that might be biotic or abiotic, and that avoid the over-growth of a population in a certain space. It results in a natural equilibrium of its biotic potential. Explain what is meant by carrying capacity: The carrying capacity K is the maximum point delimited by available resources, such as food or space. K is a constant that coincides with the size of the population at the equilibrium point when the natality rate and the mortality rate get qual to each other.
Explain why a newly introduced consumer e. Biologic Invasions refer to new species that disperse and establish in a new area far or out of their original distribution range. Once established, these species expand their distribution from the first invaded spot and overgrows. Once stablished, they expand. In the new area, they have less environmental pressure and better conditions than in their origin area -fewer predators, more resources, better nitches-, and these factors favor their overgrowth and consequently uncontrolled expansion.
At this point, the population is exhibiting exponential growth. They have enough food available, they might not have predators, they do not have enough competitors for food or space, and if they do they are adapted to live under harder conditions so they are able to compete. The new species is not suffering from the effects of limiting factors yet. Describe a likely outcome for a rabbit population after the initial rapid increase had slowed: There are some typical steps in an invasion process:.
The new species establishes in the new area. It can grow, reproduce and make use of resources. At this point, they compete for limiting factors such as food or space. Their population is big enough to be affected by resource availability and by other species that interact with them.
The invasive species reach the point in the curve where they stabilize. Describe the effect that introduced grazing species might have on the carrying capacity. The introduced species expand fast and consume too many resources. Available resources, such as food or space, decrease. Health , Answers: 2. Answer from: Shelleycarousel. When There is a decreased rate of death and more of a rate of birth. Answer from: kymmyaboss2. Answer from: andrwisawesome0. Answer from: yyyyyy Answer and Explanation Explain why populations tend not to continue to increase exponentially in an environment: The exponential growth model is based on unlimited resource availability which means that there is no effect depending on density.
Describe a likely outcome for a rabbit population after the initial rapid increase had slowed: There are some typical steps in an invasion process: 1 Introduction or dispersion to the new area, 2 Naturalization. Exponential growth 4 Interaction with other species. They reach an equilibrium point.
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