Amoeba Sisters Video Recap: Food Chains, Food Webs, and an Introduction to Biodiversity

12. Frogs

increase, more grasshoppers = more food = more frogs

13. snakes

increase, more grasshoppers = more food = more snakes

9. grasshoppers

increase, not enough predators since frogs are getting eaten

5. If the grass in this example had 25,000 Kcal of energy, approximately how much would you expect of that energy to be stored in trophic level 4? ___________________Kcal

25 kal of energy Explanation: 10% rule : level 1 : 25,000/10 = 2500 level 2 : 2500/10 = 250 level 3 : 250/10 = 25 level 4 : 25 kal left

6. Fungus is an organism not drawn in the above food chain although it has a very important role. Describe an important role of organisms such as fungi and bacteria:

Fungi and bacteria help other things such as wast and minerals break down and reproduce. They are very important role of organisms. Without them our grounds would be full of trash and non broken down minerals. Our lands would be toxic on the outside, and many animals would die. It isn't on the food chain because, nothing really eats it, because some are toxic, but we also need them for the environment and breaking down things.

Please use the above food web to determine whether there is an increase, decrease, or no change for each organism type in the chart below based on the given scenario. When filling in the empty boxes, please explain why you determined an increase, decrease, or no change. Two boxes have been filled in for you!

#9-14.

2. For the grass, please circle any of the below alphabetized words in this box that correctly describe this organism. Note: You will have more than one word circled.

Autotroph Producer

15. Which of the following contributes more to ecosystem sustainability: the food web on this page or the food chain on the other page? Explain your answer in terms of biodiversity.

Biodiversity means that there will be a richness and abundance in plant and animals in a specific habitat or ecosystem. The food web on this page leads to more ecosystem sustainability. This is because there are more species in this food web, with stable changes in every category. There will not be an abundance in one category while there is a scarcity in the other.

7. Circle any applicable words below that could correctly identify the organism above:

Decomposer relating to the picture of the fungus

4. Please arrange the organisms from the food chain into an energy pyramid. After drawing your energy pyramid below with the labeled organisms inside, please label it with the following words: 1st trophic level, 2nd trophic level, 3rd trophic level, and 4th trophic level.

Energy pyramid (top to bottom) 1st level: snake (top) 2nd level : frog 3rd level : insects, bugs 4th level : grass (bottom)

For the food web below, please draw in arrows to represent the correct direction of energy flow.

Grass -> insect & rabbit clover thing -> insect other plant at the bottom with 3 blue balls -> insect insect -> frog and bird rabbit & bird & frog -> snake snake: none cuz its jus different

3. For the frog, please circle any of the below alphabetized words in this box that correctly describe this organism. Note: You will have more than one word circled.

Heterotroph Secondary consumer

There are types of pathogenic fungi that can attack living amphibians (such as frogs). One of these types of fungi is known as the Chytrid fungus. For each of the following organisms in the table, describe how each organism population might be affected by a Chytrid fungus infestation.

Scenario 1

Grasshoppers can be extreme pests for farmers as they can damage crops. For each of the following organisms in the table, describe how each organism population might be affected by a significant grasshopper population increase such as a visiting locust swarm.

Scenario 2

11. Producers

decrease, more grasshoppers = more producers being eaten

14. producers

decrease, more grasshoppers = more predators

10. snakes

decrease, since less frogs

1. For the food chain on the right, please draw in three arrows to represent the correct direction of energy flow. Then use this food chain to answer the below questions.

grass ---> bug ---> frog ---> snake