University:
University of California, Berkeley
Course:
EPS C12 | The Planets
Academic year:

2024
Views:

460

Pages:

2
Author:

numcore694sxk

Interpreting a Food Web Test 1. To show the preda- Why are the arrows always drawn from the prey totor-prey relationship. wards the predators? The flow of energy. What are they showing the flow of? 2. Algae, Aspen Tree, Breaded Wheatgrass, Gray Willow Tree, and Sagebrush. The Sun. The four plants and algae at the bottom of your food web are the only organisms that do not have any arrows pointing at them. What is their source of energy? 3. They produce energy Plants and algae are often referred to as producers. for other animals to What exactly do they produce? eat. 4. Snowshoe hare, mayfly, cutthroat trout, deer mouse, and beaver. Primary Consumers are organisms that directly feed on producers. What animals on your food web would be classified as primary consumers? 5. Elk, bison, grizzly bear, and Harlequin duck. Secondary consumers are organisms that directly feed on Primary consumers. What animals on your food web be classified as secondary consumers? 6. Coyote, Bald Eagle, Gray Wolf, and Red Fox. Tertiary or top consumers are animals at the top of the food web. They feed off of either primary or secondary consumers. What animals would fit into this classification? 7. Bear and Cutthroat Trout. Primary consumers are sometimes called herbivores, as they only eat plants. Primary or secondary consumers that only eat meat are called carnivores. Primary or secondary consumers that eat both plants and animals are called omnivores. Identify the two omnivores in your food web. 8. Producers. If you were to take a walk through a part of Yellowstone National Park, which level of the food web would you expect to see the most of? 9. Primary Consumers. 1/2 Which level of the food web would you expect to see the least of? 10. Deer Mouse: 100% Red Fox: 10% Gray Wolf: 1% According to the Ten percent law, only about 10% of the energy consumed makes it from one trophic level to the next. With this in mind, if you started with 1,000 calories of willow leaves, how many calories would make it to each of these other animals? 11. You see more of them because they don't move like other animals do. Top predators are more scared of you than you are of them. Based on your answer to the previous question, why are there so many more producers in any given ecosystem than any other organism? Why are top predators so rare to witness in the wild? 12. Everything besides the plants. One trophic level not shown on this food web is the decomposer. These organisms, which include bacteria, fungi, and some invertebrates, eat dead and decomposing organic matter. If you were to draw a decomposer on this food web, what arrows would be pointing to it? 2/2