Population Pyramids
This population pyramid is on the decline.
The population pyramid is slightly declining but almost to the point where it is a balanced population.
This Population pyramid is on the decline due to the small base and wide middle.
This population is declining rapidly.
This population is declining.
Data Snapshots
1. Identify the parking lot that was the most diverse. Based on your observations during the lab, explain why your
prediction in question #1 of the prelab was supported or not supported.
2. List the single most abundant species in each set of data, and write a plausible explanation to explain why these are
the most abundant species.
3. Determine the maximum and minimum values for the Shannon Diversity Index in the parking lot you surveyed.
4. If you conducted this lab in a shopping mall parking lot, predict whether the Shannon Diversity Index would be high or
low, and how it would compare to the school parking lots.
5. If you conducted this lab at a new car dealership, predict whether the Shannon Diversity Index would be high or low,
and how it would compare to the school parking lots.
prediction in question #1 of the prelab was supported or not supported.
2. List the single most abundant species in each set of data, and write a plausible explanation to explain why these are
the most abundant species.
3. Determine the maximum and minimum values for the Shannon Diversity Index in the parking lot you surveyed.
4. If you conducted this lab in a shopping mall parking lot, predict whether the Shannon Diversity Index would be high or
low, and how it would compare to the school parking lots.
5. If you conducted this lab at a new car dealership, predict whether the Shannon Diversity Index would be high or low,
and how it would compare to the school parking lots.
What were the degrees of freedom used in this exercise? 6
What is the calculated chi-square (χ2) value? 79.23
Do your results indicate that it was chance alone that caused the
unequal numbers of capture wooly worm phenotypes? Explain.
Which colors of worms were subjected to a positive selection
pressure? Which colors of worms were subjected to a negative
selection pressure? Explain.
What do these results indicate might happen over time to this wooly
worm population?
Consider feeding times, feeding habits, ability to see color, vision
acuity, and other possible characteristics of predatory birds in nature.
How might such characteristics determine selection of certain worm
colors?
Consider the school grounds upon which you “fed” on your wooly
worms. If this particular environment remained unchanged over a
very long period of time, how would the populations change? What would the community look like in 10 years?
What is the calculated chi-square (χ2) value? 79.23
Do your results indicate that it was chance alone that caused the
unequal numbers of capture wooly worm phenotypes? Explain.
Which colors of worms were subjected to a positive selection
pressure? Which colors of worms were subjected to a negative
selection pressure? Explain.
What do these results indicate might happen over time to this wooly
worm population?
Consider feeding times, feeding habits, ability to see color, vision
acuity, and other possible characteristics of predatory birds in nature.
How might such characteristics determine selection of certain worm
colors?
Consider the school grounds upon which you “fed” on your wooly
worms. If this particular environment remained unchanged over a
very long period of time, how would the populations change? What would the community look like in 10 years?