In this portfolio activity, you will design and conduct a simulation to investigate the effects of resource availability on populations. The resources populations need to survive are found in their ecosystems. When there is competition for these resources, not all organisms can get what they need. Look at the ecosystem shown. What resources that plants and animals need can you identify in the photo? What resources are plentiful? Which might be more scarce? In this section, you will identify evidence of the effects of resource availability on organisms and their populations in an ecosystem. A scientific investigation begins with questions. In this investigation, you will be gathering data through simulation. What conditions will you simulate? What questions do you hope to answer?
11 answers
For the simulation, one condition that can be simulated is a decrease in the availability of water. This can be done by reducing the water input or increasing the frequency of droughts. Another condition that can be simulated is a decrease in sunlight availability, for example, by reducing sunlight exposure time or increasing cloud cover. The simulation can also introduce competition for resources among different organisms.
Some questions that can be answered through the simulation are:
1. How does a decrease in water availability affect the survival and population sizes of different species in the ecosystem?
2. How does a decrease in sunlight availability affect the growth and reproduction of plants in the ecosystem?
3. What strategies do organisms adopt in response to competition for resources?
4. How does resource availability impact the overall biodiversity and stability of the ecosystem?
5. Are there any species that are more resilient or better adapted to survive under limited resource conditions?
Materials:
1. Beans of different colors (to represent wolves)
2. Timer
3. Cups or bags (to represent the ecosystem)
4. Pencil
5. Paper
Procedure:
1. Set up an area to represent the ecosystem by placing cups or bags in a designated space.
2. Label each cup or bag with a number to identify it.
3. Assign a specific number of beans to represent the population of wolves in the ecosystem.
4. Start the timer and allow the wolves to "forage" for resources (represented by beans) in the cups or bags.
5. After a set amount of time, stop the timer and count the number of beans in each cup or bag.
6. Record the data on paper, indicating the number of beans for each cup or bag.
7. Repeat the simulation multiple times, each time altering the amount of water available in the ecosystem. This can be done by removing or adding beans to represent a decrease or increase in water availability.
8. Analyze the data collected, looking for trends or patterns in the population size of wolves based on the availability of water.
Testing the Simulation:
Perform the simulation using the materials and procedure listed above. Observe if the simulation works as intended and if the data collected allows for analysis and interpretation of the effects of water availability on wolf population size. Make any necessary adjustments to the procedure if needed.
The evidence from the simulation supports these conclusions by providing a visual representation of the relationship between water availability and wolf population size. The data collected, recorded in the data table, clearly shows a decrease in the number of beans in the cups or bags as water availability is reduced. Additionally, the graph created using the data further illustrates the trend of declining wolf population size with decreasing water availability. This empirical evidence strengthens the conclusion that water availability has a significant impact on the population dynamics of wolves in the ecosystem.
Portfolio Materials:
1. Materials List:
- Beans of different colors
- Timer
- Cups or bags
- Pencil
- Paper
2. Written Procedure:
- Steps used to perform the simulation
3. Data Table:
- Record of the number of beans in each cup or bag for each trial of the simulation
4. Graph:
- Visual representation of the data collected, showing the relationship between water availability and wolf population size
5. Analysis of Results:
- A paragraph explaining the conclusions drawn from the data and how the evidence supports those conclusions.
Gather these materials and submit them as a portfolio project to your teacher.
1. Gather the necessary materials:
- Beans of different colors
- Timer
- Cups or bags
- Pencil
- Paper
2. Open a new Google Doc:
- Go to your Google Drive.
- Click on "New" and select "Google Docs" to create a new document.
3. Format the Google Doc:
- Give your document a title related to your investigation or portfolio.
- Set up headings or sections for each component of your portfolio (Materials List, Procedure, Data Table, Graph, Analysis of Results).
- For each section, provide the relevant information:
- Materials List: List the materials needed for your simulation.
- Procedure: Write out the step-by-step procedure you designed for your simulation.
- Data Table: Create a table to record your data, with rows representing each trial and columns for the different cups or bags.
- Graph: After inputting the data into a spreadsheet, you can create a graph by selecting the data and using the "Insert" options in Google Docs to add a graph.
- Analysis of Results: Write a paragraph analyzing the conclusions drawn from your simulation, referring to the data and evidence collected.
4. Save and share the Google Doc:
- Click on "File" and select "Save" to save your document.
- Click on "Share" to invite collaborators or share the document with your teacher.
Remember to include any necessary citations or references to any sources you used in your investigation.