Exploring Species Interactions in a Lab Setting
Discover examples of predation, competition, symbiosis, and energy flow in a food chain through interactive lab stations. From predator-prey relationships to mutualistic interactions, observe and learn about ecological dynamics in a hands-on environment.
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Species Interactions lab kit Obj: Observe examples of predation, competition, symbiosis, and energy flow in a food chain
Lab Station 1 Lab Station 1 Predator Predator- -prey relationship prey relationship Procedure: 2 petri dishes 2 pipets 2 microscopes 2 deep well (depression) slide 1. Add 1 drop of Stentor culture to the depression slide. Observe Stentor under 4X and then 10x Add 1 drop of Chilomonas solution to the same depression slide and observe what happens. 2. Organisms: Stentor Chilomonas Lab questions 1. Define predation 2. Describe the predator-prey relationship between Stentor and Chilomonas
Lab station 2 Lab station 2 Competition Competition Stentor culture Chilomonas culture Amoeba culture 2 depression slides 3 pipets Procedure: 1. Use a pipet to place 1 drop of Amoeba culture on your depression slide. Find under 4x and 10 x 2. Now add 1 drop of Chilomonas culture to the same depression slide. Do not let the tip of pipet touch the culture on slide. 3. After 2 minutes of observation now add 1 drop of Stentor to the depression slide. Observe the feeding behaviors of the organisms. Lab questions: 1. Compare the predatory behavior of Stentor to the predatory behavior of Amoeba. How are they similar? How are they different? 2. If Stentor & Amoeba were to share the same habitat with a limited population of Chilomonas, predict what would occur?
Lab Station 3 Lab Station 3 Symbiosis Symbiosis Termites Forceps Microscope slide Coverslip Procedure: 1. Use the forceps to GENTLY grasp a termite by the abdomen. 2. GENTLY apply pressure of the abdomen to the slide. The termite will excrete a drop or 2 of intestinal contents. 3. Cover the excreted material with a coverslip and observe under 4x and 10 x Lab questions: 1. Record your observations with a drawing 2. Describe what you observed when examining the termite gut under the microscope? 3. How is this relationship an example of mutualism?
Lab Station 4 Lab Station 4 Food chains and Energy Flow Food chains and Energy Flow Yeast solution dyed with Congo red Procedure: 1. Place a drop of 1 yeast solution on a depression slide. OBSERVE 2. Add a drop of Paramecium to the same depression slide. OBSERVE (does one species consume another?) 3. Add 1 drop of didinum to the depression slide. OBSERVE (does one species consume another?) Paramecium culture Didinium culture Depression slides 3 pipets Lab questions: 1. Draw a food chain incorporating the 3 organisms your observed. 2. Yeast feed on organic compounds. Would you consider yeast producers or consumers? Explain
