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What are the underlying principles of how populations change over time? Two basic principles are involved, the idea of exponential growth and its ultimate control.
- An Introduction to Population Growth
population growth: how the size of the population is...
- Introduction to Population Demographics
Demographics can include any statistical factors that...
- The Breeder's Equation
Most of the traits that interest biologists, such as...
- Population Limiting Factors
Population growth can be limited by density-dependent or...
- Ignoring Population Structure Can Lead to Erroneous Predictions of Future Population Size
There are mathematical formulas to calculate the asymptotic...
- Climate Change and Avian Population Ecology in Europe
Continental population changes have been demonstrated in...
- An Introduction to Population Growth
The 2022 projections from the United Nations Population Division (chart #1) show that annual world population growth peaked at 2.3% per year in 1963, has since dropped to 0.9% in 2023, equivalent to about 74 million people each year, and could drop even further to minus 0.1% by 2100. [4]
We revive the logistic model, which was tested and found wanting in early-20th-century studies of aggregate human populations, and apply it instead to life expectancy (death) and fertility (birth), the key factors totaling population.
population growth: how the size of the population is changing over time. If population growth is just one of many population characteristics, what makes studying it so important? First,...
Over the last few centuries, the human population has gone through an extraordinary change. In 1800, there were one billion people. Today there are more than 8 billion of us. But after a period of very fast population growth, demographers expect the world population to peak by the end of this century.
20 maj 2021 · These two concepts, hyperexponential technology-driven growth and dynamic carrying capacity-limited population, are encoded in a new, predictive system dynamics model. Past predictions of the future of human population range from qualitative to quantitative.
16 maj 2023 · Based on our own survey of literature collecting 873 population size estimates in 25 studies, we examine the recent trends in the population growth and develop a parsimonious model fitting the world population since 400 CE better than any single-inflection-point fit previously proposed.
