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Duncan Bio Ch. 3-6c
Populations
| Question | Answer |
|---|---|
| What is a population? | members of the same species living in the same place |
| What is population density? | The number of individuals living in one area |
| If you have many individuals living in a small area, is this a dense or not dense population? | dense |
| Movement of organisms into a population | immigration |
| movement of organisms out of a population | emigration |
| The growth rate is determined by | #births-# deaths (also need to take into account immigration and emigration) |
| Really fast population growth with enough resources | Exponential growth |
| slow, stopped or decreased population growth due to lack of resources | logistic growth |
| what is carrying capacity? | the maximum number of organisms that can be supported by an ecosystem. This number depends of how many resources are available |
| What is a limiting factor? | something that limits population growth |
| What are the 2 general types of limiting factors? | density dependent limiting factors density independent limiting factors |
| Density dependent factors | affect crowded populations: competition, predation, disease |
| Density independent factors | affect all populations in the same way: weather patters, natural disasters, seasonal cycles, human activities (like pollution, deforestation, resource depletion |
| The game Oh, Deer! modeled what kind of limiting factors? | competition and predation (density-dependent) |
Created by:
msduncan
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