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Ecology lab answers

01/01/2021 Client: saad24vbs Deadline: 7 Days

ENV326 Ecology and Evolution Week Four Laboratory Instructions


Resource needed: Annenberg Learner. (n.d.). Ecology [Interactive lab]. In The Habitable Planet. Retrieved from https://www.learner.org/courses/envsci/interactives/ecology/ 1. Carefully review the Grading Rubric for the criteria that will be used to evaluate your assignment


before you begin. Complete Tables 1 through 4 and answer questions 1 through 7. List any references


used in the Reference Section.


2. Go to https://www.learner.org/courses/envsci/interactives/ecology/ to open the ecology lab simulator.


3. To complete Table 1 – Select Plant A and Plant B from the Food Web by clicking on the plant


images. Click on the “Step” tab once to collect data on each plant population on Day 1. You can


collect the data by moving your cursor over the graph where the population size for each species is


given. Record your Data in Table 1 in the Ecology Laboratory Reporting Form. Then repeat by


clicking the tab until you reach Days 4 and 8, and record the data. Finally, click on “Run” to reach


Day 100 and record the data in Table 1. Answer question number 1.


*If you make a mistake, click on All Species Off to remove species from your graph and/or


click on reset to remove data from the graph.


4. To complete Table 2 – Select Plants A and Plant B, and Herbivore A from the Food Web by


clicking on the species images. Click on the “Step” tab once to collect data on each species


population on Day 1. Record your Data in Table 2 in the Ecology Laboratory Reporting Form.


Then repeat by clicking the tab until you reach Days 4 and 8, and record the data. Be sure to also


record the beginning population size for each species at Day 0 by placing your cursor over the


graph where Day 0 intersects with each population line. Finally, click on “Run” to reach Day 100


and record the data in Table 2. Answer questions 2 and 3.


https://www.learner.org/courses/envsci/interactives/ecology/

https://www.learner.org/courses/envsci/interactives/ecology/

http://learner.org/courses/envsci/interactives/carbon/carbon.html

http://learner.org/courses/envsci/interactives/carbon/carbon.html

*When you select Herbivore, be sure to also select Plant A from the drop down box. You


are on the right track when you see a line from Herbivore A to Plant A on your Food Web


diagram.


5. To complete Table 3 – For table 3, you will make some predictions about changes to the


population size for each species in your community. Review the table and based on the assigned


reading and your results from Tables 1 and 2, predict whether each population will increase,


decrease, or die out. Select Plants A and B, Herbivore A, Omnivore A, and Top Predator from


the Food Web by clicking on the species images. When you select the species be sure that


Herbivore A eats Plant A, and Omnivore A eats only Herbivore A. Click on “Run” to reach Day


100 and record whether each population increased, decreased, or died out. Answer questions 4


and 5.


6. To complete Table 4 – You will continue to make population predictions in a more complex food


chain by indicating whether each species increased, decreased, or died out. This time, select


Plants A, B, and C; Herbivores A and B; and Omnivores A and B, and Top Predator from the


Food Web by clicking on the species images. When you select the species be sure that all species


are linked in a chain. For example, Omnivore C eats Herbivore C which eats Plant C. The top


predator eats both Omnivores A and C. Your food web should look like the one below. Click on


“Run” to reach Day 100 and record whether each population increased, decreased, or died out.


Answer questions 4 and 5.

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