BIO 240 Disruption of a Marine Food Web Worksheet Recent

Examine the graphs in the Lab Book, and describe any trends you observe among kelp, purple sea urchin, and sea otter populations.
What happened to all three populations when catastrophe struck the sea otters? Which populations were wiped out, and in what order?
Why do you think the removal of the otters caused the other two populations to crash as well?
Examine the graphs in the Lab Book. What happened to the populations’ growth patterns when 100 individuals of each species were reintroduced to the habitat?
What would have happened if you had only reintroduced the kelp and the urchin? Explain.
What if you had only reintroduced five individuals of each species? Would that have worked to restore the populations? Explain your hypothesis.
Describe the results of the simulation. Was your hypothesis supported?

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Describe the growth patterns of the mouse, cougar, and red-eared slider populations when pythons are not present.
Describe the growth of the Burmese python population immediately after they were introduced.
What happened to the populations of the other animals?
Suggest one reason why the introduction of Burmese pythons to this ecosystem may have caused the effects you observed.

What happened to the cougar and Burmese python populations when 80% of the Burmese pythons were removed?
What do your observations reveal about the challenges involved in fighting invasive species?
Based on your observations of Burmese python population trends, recommend a way managers could fight the Burmese python invasion in the Everglades. Explain your reasoning.
Would you recommend introducing another nonnative species from Southeast Asia that is known to prey upon the Burmese python or its eggs? Explain.
Not all invasive species are predators.
Which of the following characteristics would help any nonnative species, regardless of its place in the food chain, become invasive? Select all that apply.