Factors of Population Growth

Population growth does not follow exponential growth mainly because of limited resources. However, in laboratory environments populations can exhibit exponential growth. For example, bacteria populations grow incredibly fast because of their short reproductive times. In the article Exponential & Logistic Growth “we could start with just one bacterium and have enough bacteria to cover the Earth with a 1-foot layer in just 36 hours.”

In exponential growth models, the rate of growth in a population never changes and is typically unrealistic. In the real world resources like food, for example, will run out if a population keeps growing exponentially. Thus a population will reach its carrying capacity. Carrying Capacity is the maximum number of individuals a population can support based on that population’s needs.

Image source: https://steemitimages.com/DQmbf5GA6uXt7gqybYTZPAJYu12gjPhxWUdVbUd8imAWnfC/PopulationGraph.png

Sources:

https://www.khanacademy.org/science/biology/ecology/population-growth-and-regulation/a/exponential-logistic-growth

One Reply to “Factors of Population Growth”

  1. This concept of carrying capacity is interesting, especially when it comes to humans. There seems to be a falsehood that many people in first world countries believe. That is, we will never run out of resources. This obviously isn’t realistic and I think we are closer to carrying capacity than we believe we are. Even if we find renewable resources the world is only so large.

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