Antarctic Food Web - Application of Biology - Lecture Notes, Study notes of Biology

Download Antarctic Food Web - Application of Biology - Lecture Notes and more Study notes Biology in PDF only on Docsity! “Antarctic Food Web Computer Simulation” Objective: The learner will make predictions about using their knowledge of food chains and webs. The learner will analyze graphical data to draw conclusions about different feeding levels. Activity 1: Use the following instructions to answer questions 1-6 on your answer sheet. 1. READ the opening screen. (Click on the down arrow on the iceberg to scroll down the text) Click CONT when you are finished. 2. READ the Antarctic Food Web screen (Use the down arrow to scroll the text) 3. Click on the different organisms to identify each. Activity 2: Use the following instructions to answer question 7 on your answer sheet. 1. Click on Food Chain One (Pink icon at the bottom of the screen) Click on CONT to go to a new screen. 2. Click on each organism in the food chain to identify it. Activity 3: Use the following instructions to answer questions 8-9 on your answer sheet. 1. Click on CONT. At the top of the screen you should see four bars: ENERGY REQUIRED, ENERGY PROVIDED, LIFESPAN IN YEARS, AND OFFSPRING PER YEAR. Below the bars, you should see pictures of the organisms in the food chain. 2. Click on the organism to the far left – the phytoplankton. Record its information in the table on question 8. 3. Click on the organism to the far right – the leopard seal. 4. Click on the “run” button at the bottom of the screen and observe the graph. Note that the color of the line in the graph corresponds to the color on the population pyramid and the color of the outline of the organism icon. For example the green line corresponds to the bottom level of the pyramid and the phytoplankton. 5. To stop the population graph, click on the Pause button at the bottom of the screen. To rerun the simulation click on Reset All button and then click Run. Activity 4: Use the following instructions to answer question 10 on your answer sheet. 1. Click on the Fish (Cod). 2. Click and drag the orange button under “OFFSPRING PER YEAR” from medium to low. This would cause fewer than normal fish to be produced in this ecosystem. 3. Click Run and observe the population graph. Also observe the population pyramid. Pay attention to which populations increase, which decrease and the order in which the changes occur. You may have to run this several times to make your observations. To do so click on Reset All, and repeat steps 2 and 3. You must reset the variable bars! Activity 5: Use the following instructions to answer questions 11-12 on your answer sheet. Commercial fishermen, off the coast of Antarctica, begin killing leopard seals because of their believed impact on the fish population in the area. 1. Using one or more of the variable bars, move the orange diamond buttons to simulate the change that would occur in the leopard seal population. Run your simulation. Activity 6: Use the following instructions to answer questions 13-14 on your answer sheet. A larval form of sea worm ingests a diet of krill egg, which would normally control the population of krill. A small change in the water temperature killed most of the sea worm population resulting in an explosion of krill. 1. Using one or more of the variable bars, move the orange diamond buttons to simulate the change that would occur in the krill population. Run your simulation. Activity 7: 1. Click on the “Back” rock button and go back 2 screens to the Antarctic Food Web Screen. 2. Click on Food Chain Two. 3. Click on CONT. 4. Look at the screen titled Food Chain Two. There is an international ban on whaling that is supported by all nations except Japan and Norway. Looking at this screen, predict the effects of lifting (removing) the ban on this entire food chain. Use the following instructions to answer questions 15-19. 5. Click on CONT to get to the graph screen. 6. Using one or more of the variable bars, move the orange diamond buttons to simulate the change that would occur if the ban on whaling were lifted (removed). 7. Run your simulation. Docsity.com