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OSE HS BIO: B.1 Lesson 5

Last updated 10 months ago

19 Nsɛmmisa

Step 1: Anchoring Phenomenon Recap

2

Data Exploration: Serengeti Wildebeest & Lion Populations (15 mins)

Guided Analysis & Discussion (20 minutes)

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4. Human Impact Scenario (10 min)

Human Impact Scenario – Resort Development

A large international company has purchased land inside the Serengeti to build a luxury resort. Construction will fragment habitats and increase tourism.

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1.

What patterns have we noticed so far in wildebeest numbers and their environment?
When you have completed your response, put give the teacher a thumbs up response. Be prepared to share.
(5 minutes)

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2.

What does the dotted line represent in the graph?

Population growth rate

Carrying capacity of the wildebeest population

Average wildebeest size

Yearly migration patterns

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6.

What trend does the lion population show from 1950 to 2000?

Steady decline throughout the years.

No significant change observed.

Overall increase with some fluctuations.

Sharp increase after 1970.

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10.

What does the orange line represent in the graph?

Total predator-prey interaction

Lion population over time

Wildebeest population over time

Wildebeest extinction trend

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14.

Curve Analysis
Where is the growth exponential? Where does it level off?
What evidence shows the carrying capacity?

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15.

Limiting Factors
What biotic or abiotic factors could make the wildebeest population overshoot carrying capacity and then drop below it?

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16.

Predator–Prey Interdependence
Compare the lion graph to the wildebeest graph.
How do changes in the wildebeest population affect lions?
Predict what would happen if the apex predator (lions) were removed.

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17.

Direct Impact:
How might this development affect the wildebeest and lion populations in the short and long term?

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Interactions & Feedbacks:
How could changes in these two key populations ripple through predator–prey relationships and the overall food web?

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19.

Costa’s Level 3 – Predictive Thinking:
Based on what you know about energy flow and ecosystem dynamics, predict how other components of the ecosystem—such as plant communities, scavengers, smaller herbivores, and soil nutrient cycles—might change if the resort is built. What evidence or reasoning supports your prediction?

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3.

What happened around 1960 according to the graph?

Decrease in food sources

Increase in predators

Natural habitat destruction

Introduction of disease control measures

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4.

What trend is shown after the disease control era?

Constant decline in carrying capacity

Dramatic increase in predators

Rapid decline in population

Population growth stabilizes near carrying capacity

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5.

What is the general trend of the wildebeest population from 1950 to 2000?

Population fluctuates randomly

The population increases over time

Population remains stable

Population only decreases

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7.

Which decade saw the highest lion population?

Between 1970 and 1980.

Between 1990 and 2000.

Between 1950 and 1960.

Between 1980 and 1990.

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8.

How did the lion population change from 1960 to 1970?

It experienced slight decreases and increases.

It increased sharply throughout.

It only decreased steadily.

It remained constant over the decade.

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9.

What was the lion population around 1980?

Close to 30,000 lions.

Around 15,000 lions.

Approximately 22,000 lions.

About 27,000 lions.

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11.

What trend is seen in lion population from 1950 to 2000?

Population stays constant

Wild fluctuations yearly

Gradual increase in lion population

Sudden drop in population

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12.

What is the relationship between lions and wildebeests in this graph?

Lions are predators of wildebeests

They have no interaction

Both are competing species

Wildebeests are predators

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13.

What does the y-axis represent in the graph?

Number of species

Relative population of species

Number of years

Habitat area