Summary
Growth that slows as a population nears carrying capacity, forming an S-shaped curve.
In depth
dN/dt = rN(K-N)/K. Growth is fastest at K/2 and zero at K. Real populations may overshoot and oscillate around K, especially with time lags.
Phases: lag, exponential, deceleration and plateau.
The logistic model assumes constant K and no time lags. Real populations may oscillate. Harvesting is most sustainable at about K/2, where growth is maximal.
Example: fisheries use this concept in setting maximum sustainable yield.
Frequently asked questions
What is Logistic Growth?
Growth that slows as a population nears carrying capacity, forming an S-shaped curve.
Which area of biology covers Logistic Growth, and how advanced is it?
Logistic Growth is one of the 54 topics in Ecology. It is rated Intermediate, so it suits learners who already know the core vocabulary. Related topics in this area include Exponential Growth, Carrying Capacity, Lotka-Volterra Models.
Can you give an example of Logistic Growth?
Yeast in a closed container follows an S-shaped curve until nutrients run out or alcohol accumulates.
What should I learn before Logistic Growth?
Work through the Beginner topics in Ecology first, such as Ecology, Ecosystem, Biotic and Abiotic Factors, then return to Logistic Growth. Intermediate topics assume the Beginner vocabulary.
What topics are related to Logistic Growth?
The closest topics to Logistic Growth are Exponential Growth, Carrying Capacity, Lotka-Volterra Models, Limiting Factors. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Logistic Growth?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Logistic Growth. To practise the whole of Ecology, use the Ecology quiz.
How is Logistic Growth different from Exponential Growth?
Logistic Growth: Growth that slows as a population nears carrying capacity, forming an S-shaped curve. Exponential Growth: Population growth at a constant per capita rate, producing a J-shaped curve in unlimited conditions. Read both side by side and note what each one explains.
How should I study Logistic Growth step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Exponential Growth and explain the difference aloud. Finally, take the Ecology quiz and come back to this page for any question you miss.