Summary
All the individuals of one species living in the same area at the same time.
In depth
Populations are defined by species and area. Key traits: size, density, dispersion (clumped, uniform, random), birth and death rates, immigration and emigration. Change = (births + immigration) - (deaths + emigration).
Population size is estimated through sampling. Birth and death rates determine growth. Demography uses life tables.
Key idea: a population is defined by interbreeding and shared geography.
Frequently asked questions
What is Population?
All the individuals of one species living in the same area at the same time.
Which area of biology covers Population, and how advanced is it?
Population is one of the 54 topics in Ecology. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Population Density, Age Structure, Allee Effect.
Can you give an example of Population?
A wolf pack population within Yellowstone.
What should I learn before Population?
Population is a Beginner topic, so no earlier topic is required. Other Beginner topics in Ecology that pair well with it include Ecology, Ecosystem, Biotic and Abiotic Factors.
What topics are related to Population?
The closest topics to Population are Population Density, Age Structure, Allee Effect, Exponential Growth. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Population?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Population. To practise the whole of Ecology, use the Ecology quiz.
How is Population different from Population Density?
Population: All the individuals of one species living in the same area at the same time. Population Density: The number of individuals per unit area or volume, estimated with quadrats or mark-recapture. Read both side by side and note what each one explains.
How should I study Population 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 Population Density and explain the difference aloud. Finally, take the Ecology quiz and come back to this page for any question you miss.