EES_Y3_LSN5

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

EES_Y3_LSN5

Evolution, Ecology & Sustainability

Lesson 5 - Populations: P. 318-321, 330 

Learning goals:

• I can explain how populations grow.
• I can explain how population growth is researched.
• I can explain & apply different types of population research.
• I can explain how population researches can be used to show the evolution of a species.
• I know what a predator-prey is and can interpret the graphs.

Keywords:

• Exponential growth
• Carrying capacity
• Limiting factor
• Population research
• Sample
• Quadrat
• Percentage cover
• MRR-method

predator-prey cycle

predator-prey cycle

Population size

immigration

emigration

death

birth

Population growth

Involves:

1. Biotic potential: max reproduction rate given all the resources the population needs
2. Environmental resistance: all factors that may limit growth. (scarcity of resources, predation, climate conditions etc)
3. Carrying capacity: max population size that can be supported by a particular environment

Population growth:

Population growth:

• Under ideal circumstances (excess food, shelter, space & competition) a population can have exponential growth. 
• Certain factors can limit the growth of a population (limiting factor/environmental resistance). 
• The maximum an area can handel of one species is called the                carrying capacity.

Population Research:

Population Research:

• Samples
• Percentage cover / Quadrat
• MRR-method

Carrying capacity

Environmental resistance

Few reproducing individuals

Exponential growth

What is a square called that we use to sample populations?

1. grid
2. quadrat
3. cube
4. quarter

Which one of these is a correct assumption you need to make about a population between samplings?

1. It is a closed population
2. It won't rain between samplings
3. There are lots of deaths
4. There are lots of births

If 50 crabs were captured and marked and then released and then a few days later 25 were caught and of those 5 were marked. What would the estimate of the population be?

1. 500
2. 250
3. 75
4. 200

An area of 5m2 was sampled using a quadrat to find a total of 10 sunflowers. If the area of the field was 200m2 , what is the estimated number of sunflowers in the field?

1. 20
2. 40
3. 400
4. 2000

A factor that would increase the size of the population

1. Emmigration
2. Death Rate higher than Birth Rate
3. Birth Rate Higher than Death Rate
4. Drought

A factor that is more likely to affect crowded population much more than spread out population

1. Density dependent factor
2. Limiting factor
3. Natural disaster
4. Density independent factor

A factor that decreases the population or keeps it from increasing

1. Limiting factor
2. Food surplus
3. High birth rate
4. Carrying capacity

Example of a density independent factor

1. Natural Disaster
2. Disease
3. Resource Availability/Competition
4. Predators

What is the carrying capacity of the following graph?

1. Around 500
2. More than 500
3. Less than 500
4. Around 600

Lesson 2 - Populations: P. 318-321, 330 

Learning goals:

• I can explain how populations grow.
• I can explain how population growth is researched.
• I can explain & apply different types of population research.
• I can explain how population researches can be used to show the evolution of a species.

Keywords:

• Exponential growth
• Carrying capacity
• Limiting factor
• Population research
• Sample
• Quadrat
• Percentage cover
• MRR-method

Worksheets:

Worksheets:

Brown lipped snail

Peppered moth

Homework for Lesson 5:

To be completed by the next lesson (lsn3):

• Complete ex. 4 on page 275, ex. 15 & 16 on page 281
• Read tb pages P. 270-272