0 Limiting Factors Lab Report

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Florida International University *

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2210

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Biology

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Nov 24, 2024

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Limiting Factors Lab Report Instructions: In this lab, you will investigate how limiting factors affect a population of cricket frogs in the Florida Everglades. Your scientific inquiry will focus on three limiting factors: food, predators, and pollution. Complete the following lab report to record your observations as you move through the simulation. You will submit your completed lab report for grading. Name and Title: Include your name, instructor's name, date, and name of lab. My Name: Ali Mohamed Teachers Name: Nirvana Ramgopaul Date: 4- Dec-2023 Name Of the lab: Limiting Factors Lab Objective(s): In your own words, what was the purpose of this lab? Hypothesis: In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment. If predators are increased , then the cricket frog population will (increase/decrease/stay the same) over the span of five years. If pollution is increased , then the cricket frog population will (increase/decrease/stay the same) over the span of five years. If the amount of food available is increased , then the cricket frog population will (increase/decrease/stay the same) over the span of five years. Procedure: The procedures are listed in your virtual lab. You do not need to repeat them here. Please be sure to identify the test variable (independent variable), outcome variable (dependent variable), and control group for this experiment. Reminder: The test variable is the item that is changing in this investigation. The outcome variable is the item that you are measuring in this investigation. The control group is the group in the experiment where the factors being tested are not applied. It allows scientists to set a baseline to compare the experimental groups that do have factors applied to them.

Test variable (independent variable): Cricket Frogs Outcome variable (dependent variable): A population chart is what I'm using to gauge the number of cricket frogs in the population. Control group: The three variables under test—pollution, predators, and food source—are not being used. Data: Record your data from each trial in the data chart below: Type of Factor Beginning Frog Count Simulation 1 (Low) Simulation 2 (High) Predators (alligators) 10 90k 15k Pollution 10 50k 35k Food (mosquitoes) 10 25k 85k Graphs Use the graphs you printed from the data chart in the virtual lab and analyze the data. Make a note of any trends that you discover. Predators (alligators): In the Everglades, alligators tend to prey more on fish, amphibians, snails, crustaceans, snakes, and mammals when their population is high. Pollution: The population chart of cricket frogs in the Everglades is expected to reach approximately 50K when pollution levels are low. Food (mosquitoes): Since many species in the Everglades rely on mosquitoes as a source of energy, there will always be more cricket frogs where there are more mosquitoes to eat. However, the number of cricket frogs will decline as their food sources diminish.

Conclusion: Your conclusion will include a summary and an interpretation of the lab results. Please write in complete sentences. 1. Which limiting factor(s) in this lab simulation are biotic? The biotic limiting factors in this lab simulation are the frogs (an amphibian/animal), mosquitos (a source of food), and alligators (predators). 2. Which limiting factor(s) in this lab simulation are abiotic? Pollution is the abiotic limiting factor in this lab simulation. 3. Which limiting factor impacted the cricket frog population the most? Use evidence to support your answer. Alligators. Alligators were the most significant factor because, in addition to other animals, they also eat amphibians, which means that they probably eat a lot of cricket frogs. It was stated on the population chart that there were only 15,000 cricket frogs remaining. 4. Which limiting factor impacted the cricket frog population the least? Use evidence to support your answer. The least impacted by pollution were cricket frogs. According to the population chart, 35K cricket frogs survived as a result of the pollution. This factor had the least effect on the cricket frogs in comparison to the other ones. 5. Mosquitoes can carry and transmit disease to animals and humans. Explain how the cricket frog plays an important role in limiting the spread of mosquito-borne illnesses like West Nile virus and malaria. Of course, food is necessary for the cricket frogs! They thus consume mosquitoes, which may lessen the likelihood that mosquitoes will transmit diseases to people and animals. 6. Predict the long-term effects of these limiting factors on the cricket frog population in the pond ecosystem. As long as their food chain remains intact, I predict that all limiting factors' effects on the population of cricket frogs will remain somewhere in the middle of high and low (normal).

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