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ions: As you complete each slide of the Population Dynamics Virtual Lab Activity, please fill in this lab report with the appropriate information and data.

 

Title: Population Dynamics Lab Report

 

Objective(s): Evaluate how predation, birthrates, and death rates are influenced on the killer whale and seal populations.

 

Variables:

 

Hypotheses:

Prediction 1: If the starting population of the prey is higher than the predators, the resulting population of the seals will be lower than the population of the whales.

Prediction 2: If the starting population of the predators is higher than the prey, the resulting population of the whales will be higher than the population of the seals.

Prediction 3: If the prey growth rate increases, the resulting population of the seals will be higher than the population of the whales. (Both starting populations set to 25.)

Prediction 4: : If the death rate of the whales increases, the resulting population of the seals will be higher than the population of the whales. (Both starting populations set to 25.)


 

 

Materials:

  1. The Population Dynamics Virtual Lab Activity
  2. Population Dynamics Lab Report

Procedures:

The procedures are listed in Population Dynamics Virtual Lab Activity. You do not need to include them here.

Data and Observations

Table 1: Predation and Carrying Capacity

TrialStarting Seal PopulationStarting Whale PopulationHighest Seal PopulationHighest Whale Population
125254951
250257580
325257278

Table 2: Growth Rate and Capture Efficiency

TrialSeal Birth RateCapture EfficiencyHighest Seal PopulationHighest Whale Population
10.050.0054951
20.080.0055570

Table 3: Death Rate and Capture Efficiency

TrialWhale Death RateCapture EfficiencyHighest Seal PopulationHighest Whale Population
10.050.0054952
20.090.0056757

Conclusion:

Be sure to answer the following reflection questions as a summary in the conclusion of your lab report:

  • Were your hypotheses correct or incorrect? Why or why not?
  • Using Table 1, which of the three trials produced the highest population for both the whales and the seals? Why do you think this trial had the best outcome for the whale and seal populations?
  • Using Table 2 and 3, explain how the birth rates of the seals and the death rates of the whales affected the population for both whales and seals.

Questions:

Using what you have learned from the lesson and the virtual lab activity, answer the following questions in complete sentences:

  1. Describe three additional biotic and abiotic factors not modeled in the simulation that could affect the population dynamic of the whales and seals.
  2. Explain why some limiting factors may lead to drastic changes in whale and seal populations, while others may only cause minimal changes.
  3. In this lesson, you learned about two patterns of population growth and decline, the sigmoid and peak phenomena. Does the seal and killer whale relationship represent a sigmoid or peak phenomenon? Please provide supporting details.
  4. A microbe from an ecosystem that exists in the same arctic region has infected the whale population. The graph below shows the new carrying capacity for the whale population.
  5. N represents population number, t represents time, and K represents carrying capacity.
  6.  
    Explain how these microbes have affected the whale population. Does this new evidence change the seal and killer whale relationship? Does this new relationship represent a sigmoid or peak phenomenon? Please provide supporting details.
  7. If scientists added a chemical to destroy the arctic microbes, what positive and negative consequences could result? What population settings could you adjust in the simulation to test components of this solution?
  8. Climate change in the form of global warming (an abiotic factor) has slowly decreased habitat for the arctic seals. What are the limitations of the population dynamics simulation in predicting the changes that may occur due to climate change?
  9. Imagine that all nations agreed to reduce greenhouse gas emissions by half in an effort to reduce global warming. In what ways could you revise this simulation, so it accounted for the influence of this solution on arctic habitat, and on the whale and seal populations?

 

 

PLEASE HELP!!

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