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Jan 9, 2024

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Trophic Levels Lab Worksheet Instructions: In this lab activity, we will investigate the “best” food option based on your investigative focus: nutrition, energy, availability, or environmental impact. Be sure to review the grading rubric for the lab activity before submitting your lab report to your instructor once it is completed. Title: Amrita Nirahu Trophic levels lab Objective(s): In order to select the "best" option for food, I will need to examine nutrition, energy, availability, and the impact on the environment. Background: For the purposes of this lab activity, you make the following assumptions:  One farmer consumes one-half (0.5) chicken per day for a year  One chicken consumes 40 grasshoppers per day  1,200 grasshoppers have a mass of one kilogram  One grasshopper requires 25 grams of soybeans per year  One human requires 750 grasshoppers per day  Soybeans have 3.2 calories per gram Procedure: A list of materials and summary of steps is provided for you. Materials:  Calculator  Paper  Pencil/pen  Digital charts or drawing tools (found in MS Word) Summary of Steps: 1. Identify the producer(s) and consumer(s) in this farm scenario, based on the background information. Also identify any herbivores, carnivores, or omnivores that are present. More than one term might apply to an organism. List them in Table 1 .

2. Identify two biotic and two abiotic factors that would impact this farm ecosystem. List these in Table 2. 3. Perform the calculations expected in the calculations section of your lab worksheet. All work or explanations of how you determined the answers must be provided to receive partial to full credit. 4. Answer the reflection questions after completing your calculations. All work or explanations of how you determined the answers must be provided to receive partial to full credit. Data: Complete the table to organize the data collected in this lab. Don’t forget to record measurements with the correct units and number of significant figures, if applicable. Table 1 Primary Secondary Tertiary Producers Soybeans Consumers Grasshoppers Chickens Humans Table 2 Factor 1 Factor 2 Biotic In this case, grasshoppers would be overabundant due to chickens depending on another source of food. The grasshopper population may be affected by another soybean consumer competing for food with grasshoppers. Abiotic Soybean plants could die due to a drought. Grasshoppers and soybean plants could die due to a freeze, leaving the chickens starving. Calculations: Perform the following calculations in the data section of your lab worksheet. Show all work. A. Calculate the number of grasshoppers a chicken eats per year. - In a year, 14,600 grasshoppers are consumed 40 grasshoppers per day multiplied by 365 B. How many grasshoppers are needed for a year’s supply of chickens for the farmer?

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