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Population size - Coggle Diagram
Population size
Immigration
Immigration is when someone from a enviroment enter another one. That makes the population that the person entered grow +.
Emigration
Emigration is when someone leaves her/his environment. That makes the population of the environment that the person left decrease -.
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Death
A death is when a living thing dies. That can cause the population of the living thing that died decrease -.
Resource availability
Resource availability is the amount of resources you have available. It can make a population grow or decrease. It depends on the amount of resources available you have. + -
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Competition
Competition is when two living (or more) things fight for something. For example, when two lions fight for food. The lion that loses will probably starve till death. That is competiton. And that makes a population decrease -.
Cooperation
Competition and cooperation are related. When competition is fight for something, cooperation is like helping. For example, when 3 people want a sandwich. Instead of fighting for it, they share the sandwich. That makes a population grow +.
Abiotic factors
Abiotic factors are non living things that changes how the environment works. Like temperature, soil... Abiotic factors can make a population decrease, because just a few living things can adapt and survive to changes in the abiotic factors -.
Biotic factors
Biotic factors are related no abiotic factors. But it is living things that live on that environment. Biotic factors can decrease a population.