BI 101 - General Biology

There are two types of successional events: Primary and Secondary. Explore the differences using two real life scenarios that scientists have used for decades to study changes in community structure over time. You will need 3 documents to complete this Activity:

Succession - Mt. St. Helen's Article (Webpage)

• This is an excerpt from an article written on the eruption of Mt. St. Helens that occurred on May 18th, 1980. There is no need to print this article, just read it.

Primary Succession - Yellowstone Article (Webpage)

• This is an excerpt from the Billings Gazette reporting on the infamous wild fire that swept through Yellowstone National Park in 1988. You may be required to answer some survey questions before accessing the article text.

Secondary Succession - Analysis Questions (Google doc)

• Print out this worksheet and record your data and answer the analysis questions by hand as you complete the Activity. This worksheet is not to be turned in or graded. There will be questions on the Credit Unit Assessment regarding this Activity.

For each article, answer the questions on the first page of the question set. After reading both articles and completing the first page for both events, complete the second page of the question set.