Modeling_Trophic_Levels_Virtual_Lab_1

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Jan 9, 2024

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1 Name_________________________ Date _____________________ Period ____________ Virtual Lab: Modeling Trophic Levels How Does Energy Flow through an Ecosystem? 1. Go to the following website: Virtual Lab: Model Ecosystems-McGraw-Hill Higher Education: https://nt7-mhe-complex-assets.mheducation.com/nt7-mhe-complex- assets/HHS_Biology_Oct2017/BL_02/index.html 2. Follow the instructions on the left side of the screen to build a pyramid for each of the five ecosystems. (Use the field guide to research any organism of which you are unsure of their role in the ecosystem.) 3. As you complete each ecosystem, use the pyramids on a separate sheet of paper and list the organisms at each trophic level of your pyramid. You will have 5 separate pyramids in all. Include in each: a. Total energy amounts per trophic level . (You can get this number by clicking on the Pyramid of Energy Tab) b. Total number of individuals per trophic level . (You can get this number by clicking on the Pyramid of Numbers Tab). 4. Questions: a. Does the population size increase or decrease at higher trophic levels in the pyramid of numbers of an ecosystem? Explain your answer. b. Does the amount of energy increase or decrease as you enter higher trophic levels in the pyramid of energy of an ecosystem? Explain your answer c. What might happen to an ecological pyramid of numbers in a forest ecosystem if most of the deer were killed due to hunting by people and disease? d. What would happen to an ecosystem if the decomposers disappeared? e. Using one of your pyramids, list two populations that would have a predator-prey relationship. (Be sure to state which ecosystem you used!)

2 Name_________________________ Date _____________________ Period ____________ f. Select one of your ecosystems and make a data table listing the biotic and abiotic factors (3 of each) and how they would affect one of the organisms in that ecosystem. Ecosystem___________________________________ Organism ___________________________________ Biotic factors Abiotic Factors g. Using the same organism, name its habitat and niche. Habitat ________________________ Niche ____________________________ h. Draw a food chain and a food web for one of your ecosystems. Food Chain: Comes from _____________________________________ecosystem. Food web: Comes from _____________________________________ecosystem.

3 Name_________________________ Date _____________________ Period ____________ Deciduous Forest Ecosystem Hot Desert Ecosystem

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4 Name_________________________ Date _____________________ Period ____________ Grassland Ecosystem Antarctic Ocean Shore Ecosystem

5 Name_________________________ Date _____________________ Period ____________ Freshwater Lake Ecosystem

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