Topic: Ecology Aim: Describe the flow of energy in an ecosystem. Do Now: Evolution Review #4 HW: Evolution CL due tomorrow!

1.Which species have become extinct? Why? They had an unfavorable adaptation. There was no variation in the species and they could not adapt to a major environmental change. 2. Which two species are most closely related? 1. D and E2. B and C 3. H and I4. A and I

Habitat Where an organism lives Organism’s “address”

Niche The role of a species in the environment Ex: how, when, or way they obtain nutrients, its reproductive behavior

Niches of a sunflower growing in the backyard -Absorb light, water and minerals -Provide shelter and food for other organisms (e.g. bees, ants, etc.) -Release oxygen into the atmosphere

2 organisms occupying the same niche Competition

Identify the type of organism described. 1.Feed on producers. 2.Feed on organisms that have already been killed. 3.Feed on both plants and animals. 4.Break down the remains of dead organisms and return some nutrients back to the soil. 5.Autotrophs 6.Meat eaters 7. Hunt and kill prey.

1. Identify the main source of energy in an ecosystem SUNLIGHT

2. What occurs to the energy in an ecosystem? -Energy is not recycled. -Energy is converted into different forms.

3. Describe what a food chain shows. How matter and energy passes from one organism to another

4. Identify the organisms that make up the first step of a food chain. Producers

5. Identify the organisms that make up the 2 nd step of a food chain. Herbivores Primary Consumers

6. Identify the organisms that make up the 3 rd step of a food chain. Carnivores and omnivores Secondary or tertiary consumer

7. Explain what happens to the amount of energy as it is passed through a food chain.. Amount of available energy is reduced as you move though each level.

Grass  Grasshopper  Sparrows  Hawks producers Decrease in energy (lost in the form of heat) Primary consumer Secondary consumer Teritiary consumer Herbivore Carnivore

8. Observe Figure 15 on p.727..

Grass  Marmots  Grizzly bear 8. Observe Figure 15 on p.727. Heat Soil Heat Soil Heat Soil

Grass  Marmots  Grizzly bear a.Identify the producers. Grass b.Identify the herbivore. Marmots (primary consumer) Heat Soil Heat Soil Heat Soil

Grass  Marmots  Grizzly bear c. Identify the carnivore. Grizzly bear (secondary consumer) Heat Soil Heat Soil Heat Soil

Grass  Marmots  Grizzly bear d. Infer what might happen if grizzly bears disappear from the food chain. The marmot population would increase. The grass population would decrease. Heat Soil Heat Soil Heat Soil

Grass  Marmots  Grizzly bear e. What do the red arrows represent? Heat (energy) released f. What do the blue arrows represent? Matter that makes up molecules of energy Heat Soil Heat Soil Heat Soil

9. Describe a food web. Shows all possible feeding relationships in a community

10. Observe Figure 16 on page 728.

a. Identify the producers. Berries and flowers, grasses, seeds

b. Identify 2 herbivores. (Primary consumers) Deer, grouse, insects, chipmunk, marmot

c. Identify 2 carnivores. Bear (Secondary consumer) (Also primary consumer)

Decomposers

11. Describe what an energy Pyramid shows. Shows amount of energy available at each feeding level in an ecosystem

12. Where is the 1 st feeding level in an energy pyramid found On the bottom

13. Explain why the 1 st level is the largest level. It contains the most energy and the largest # of organisms.

14. Explain what occurs to the transfer of energy as you move up the pyramid. The transfer of energy is less efficient (Each level becomes smaller)

Topic: Ecology Aim: Describe the flow of energy in an ecosystem. Do Now: Food Chain Reading Notes #’s HW:3 rd Marking Period Quarterly due Monday April 13 th. Evolution Exam Tuesday, April 14 th Food Chain Lab due Wednesday, April 15 th

15. Identify the producers. Grass 16. Identify the 3 primary consumers. Mice Grasshoppers Rabbits 17. Identify 2 secondary consumers. Foxes Grasshoppers Sparrows Frogs Hawks Snakes 18. Identify a tertiary consumer. Hawks, Snakes

19. Identify the producers. Grasses 20. Identify primary consumers. Insects 21. Identify secondary consumers. Chipmunks 22. Identify a tertiary consumer. Grizzly bears

Pyramid of energy Producers Primary consumers Secondary consumers Tertiary consumers Energy decreases

Producers Herbivores Carnivores

Let’s summarize… 1.Identify the main source of energy in an ecosystem. 2.Who is the first organism found in every food chain? Give an example. 3.Identify the sequence of organisms in a food chain. 4.Describe what happens to the energy that is passed through a food chain or up an energy pyramid. Explain why this happens.

Which statement best describes one of the levels of this pyramid? (1.) The organisms in level B obtain food directly from level A. (2.) Level D contains the greatest number of heterotrophs in the pyramid. (3.) level C contains the largest group of consumers in the pyramid. (4.) Level A contains the largest producers in the pyramid.

Which statement is best supported by the information shown in the pyramid? (1.) Chipmunks and insects can occupy the same niche. (2.) As the number of bears in this community increases, the number of chipmunks will increase. (3.) Insects are classified as omnivores in alpine meadow communities. (4.) Biomass decreases as energy is transferred from one level to another.

Which organisms would most likely have a predator-prey relationship? (1.) tapeworm and dog (2.) barnacle and whale (3.) hawk and mouse (4.) rabbit and grass