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What environmental factors influence population size?

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Presentation on theme: "What environmental factors influence population size?"— Presentation transcript:

1 What environmental factors influence population size?
Tropical forest support Large populations of trees. A dessert support few or no trees The sources are vary between different environments (food, water, space).

2 B

3 Option C/ wolves and moose
Time 1 2.5 3 5 7 8 9 10 Prey pop 16 23 Predator pop

4

5 Limiting factors Objectives: 1. Define a limiting factor
2. Identify the limiting factor that causes the problem to the population. 3. Classify this factor as a biotic or abiotic limiting factor.

6 Limiting factor Case # Limiting factor Type /nature
Affect on the population 1-plant growing in a rock whole Rock Abiotic Limits the growth of the plant population. 2- withered flowers in snow 3- Lion hunting a zebra 4- A disease affecting a leaf 5-people facing a flood 6- using insecticides for plants

7 Multitask wheel chart

8

9 Option B

10 Why competition happen?
What are the effects on the competitors


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