22.3: Lab Report
- What types of events could “reset” a succession process? Name at least one biotic and one abiotic disturbance.
- Explain how this retreat will result in different communities along the glacier’s retreat, though in similar environments. Hint: what is the difference between exposed soil at point A and point B.
- What are some advantages to using bacteria as opposed to plants in this experiment?
- What factors might speed or delay a successional process? Apply your example to succession in milk.
- What hypotheses are you testing? List both here.
- What information led you to ask these hypotheses?
- Make predictions about your hypotheses. i.e. How will you know if the data supports or refutes your hypotheses?
- Be sure to identify the variables you will test , and those you will control for each experiment.
- Prepare a table for data collection. You will be recording the pH, smell, consistency, and bacteria shapes and colors present in your milk samples.
- Describe the changing sequence of organisms and corresponding environmental changes during succession in the milk samples. Which bacteria are in each of your milk samples?
- Describe the changing sequence of organisms and corresponding environmental changes during succession in chocolate milk. Do the results of your investigation match your hypothesis?
- Compare succession in one or more types milk. Propose reasons for differences.
- Propose another experiment to test the environmental factors and/or organisms changing in your proposed scenario for milk succession.
- How could you improve your test of the hypotheses? Be specific!
- Identify what happened to the pH of the milk as time passed.
- Infer what the change in pH means about the populations of microorganisms in the milk.
LICENSES AND ATTRIBUTIONS
CC LICENSED CONTENT, ORIGINAL
- Community Ecology Lab. Authored by : Dr. William Edwards. Provided by : Niagara University. Located at : [www.niagara.edu] . License : CC BY: Attribution
CC LICENSED CONTENT, SHARED PREVIOUSLY
- Biology 102 Labs. Authored by : Lynette Hauser & Dr. James Holden. Provided by : Tidewater Community Colleg. Located at : [www.tcc.edu] . License : Public Domain: No Known Copyright