Unit 1Chapter 2

Commensalism Host Mutualism Parasites Parasitism Symbiosis Predator Prey

Terms Review

Predator and Prey

Activity 2-1A Review (p.38)

1900

1901

1902

1903

1904

1905

1906

1907

1908

1909

1910

1911

1912

1913

1914

1915

1916

1917

1918

1919

1920

0

10000

20000

30000

40000

50000

60000

70000

80000

90000

Approximate number of Hares and Lynxes Trapped per year.

Hares TrappedLynxes Trapped

Year

Num

ber

of

Anim

als

Tra

pped

1. Describe the pattern shown by the population of hares.2. Describe the pattern shown by the population of lynxes.2. Explain why changes in the lynx population appear to follow changes in the hare populations.

3. How can a predator species control the population size of its prey?4. How can a prey species control the population size of its predator?5. What might happen to the number of lynxes if the plants in the ecosystem became rare?6. Predict the probable size of each population in 1945.7. Do you think that using the numbers of trapped animals is an accurate

method of estimating population size?

8. The northern habitat where these data were collected has relatively few different species. In other ecosystems, such as a forest, the populations of different species do not usually fluctuate so much. Suggest a reason for this

Carnivore Consumers Decomposers Fermentation Herbivores Omnivores Producers Scavengers

More terms

Video

Decomposers V.S Scavengers

Read p.50 - 51 Write your own notes on what a food chain

is and the roles organisms have in the food chain.

Read p.54 – 55 Write your own notes about Food Webs and

Energy Transfer Read p.55 – 56 Write your own notes about Energy

Pyramids

Food Chains, Food Webs and the Transfer of Energy

Food Chain

Marine Food Chain

Food Web

Marine Food Web

Read and complete activity 2-3B on page 57 you can answer the questions in your notebook.

When done answer question 7 on page 59.

Activity 2-3B

Terms◦ Nutrients◦ Nutrient Cycles

Read p. 60 – 62 Update your word list

Cycles of Matter in Ecosystems

Nutrients, such as nitrogen and carbon, are recycled in the environment.

All organisms are eventually recycled and their nutrients are returned to the soil by the action of decomposers.

Nutrient Cycles

P.64 questions 1, 3, 5, 8 and 13.

Review