Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Population Growth00:57

Population Growth

Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.
What is Population Genetics?01:25

What is Population Genetics?

A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
Conservation of Declining Populations02:07

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
Threats to Biodiversity01:50

Threats to Biodiversity

There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
Modeling with Differential Equations01:25

Modeling with Differential Equations

Population dynamics can be described mathematically by considering the population size P(t) as a function of time. The rate of change of the population is then represented by the derivative of P(t). A simple assumption is that the rate of growth is proportional to the size of the population itself. This leads to an exponential growth model, where the population increases rapidly without bound. While this is a useful first approximation, it does not reflect realistic long-term...
Exponential Equations for Modeling Growth01:26

Exponential Equations for Modeling Growth

Exponential models are essential for describing rapid, multiplicative changes in natural systems, such as population growth. When a population doubles at regular intervals, the process can be modeled using a suitable base. For instance, a bacterial culture that doubles every three hours follows the model n(t)=n0⋅2t/3, where n(t) is the population at the time t.A more general model uses the natural base e, especially for continuous growth. This takes the form n(t)=n0⋅ert, where r is the relative...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Domestic animals and hygiene on infants' risk of contact and exposure to animal faeces in urban neighbourhoods in Kenya: A mixed methods cohort study.

One health (Amsterdam, Netherlands)·2025
Same author

The nexus of the risk of depression and residential mobility for urban poor mothers: New longitudinal evidence from Nairobi.

SSM. Mental health·2025
Same author

Gender equality and quality of life must be central to the design and delivery of sanitation.

BMJ global health·2025
Same author

Spatial-Temporal Patterns in the Enteric Pathogen Contamination of Soil in the Public Environments of Low- and Middle-Income Neighborhoods in Nairobi, Kenya.

International journal of environmental research and public health·2024
Same author

Progress in Maternal, Newborn, and Child Health in Cities in Sub-Saharan Africa: Are Wide Inequities Holding Back Cities?

Journal of urban health : bulletin of the New York Academy of Medicine·2024
Same author

Landscape analysis of the Kenyan policy on the treatment and prevention of diarrheal disease among under-5 children.

BMJ open·2024

Related Experiment Video

Updated: May 20, 2026

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
20:36

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

Global population trends and policy options.

Alex C Ezeh1, John Bongaarts, Blessing Mberu

  • 1African Population and Health Research Center, Nairobi, Kenya. aezeh@aphrc.org

Lancet (London, England)
|July 13, 2012
PubMed
Summary
This summary is machine-generated.

Global population trends reveal distinct growth patterns. Rapid growth in poorer nations poses threats, while low fertility in developed countries risks future welfare and economic stagnation.

Related Experiment Videos

Last Updated: May 20, 2026

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling
20:36

Predicting the Effectiveness of Population Replacement Strategy Using Mathematical Modeling

Published on: July 4, 2007

Area of Science:

  • Demography
  • Global Health
  • Socioeconomics

Background:

  • Population growth rates vary significantly worldwide.
  • High fertility impacts developing nations, while low fertility affects developed economies.

Purpose of the Study:

  • To map and analyze global population growth trends from 2005-2010.
  • To identify distinct demographic patterns and their associated challenges.

Main Methods:

  • Analysis of global population data from 2005-2010.
  • Categorization of countries based on population growth rates (rapid, moderate, low/no growth, decline).

Main Results:

  • Four distinct global population growth patterns were identified.
  • Rapid growth (>2%) prevalent in sub-Saharan Africa; moderate growth (1-2%) in India, Indonesia, North Africa, and Western Latin America.
  • Low/no growth (0-1%) in advanced economies and large middle-income countries; population decline in Eastern Europe, Japan, and parts of Western Europe.

Conclusions:

  • Rapid growth countries face social, economic, and environmental pressures; voluntary family planning is recommended.
  • Low/negative growth countries grapple with population aging and economic challenges; policies are evolving.
  • Further research is needed on demographic policies' impact on social systems and fertility trends.