Biological question:
• How has wolf reintroduction into the Greater Yellowstone Ecosystem (GYE) affected animals and plant at all tropic levels?
o Helps students understand and apply the concept of trophic cascades and food webs

Statistical content:
• Graphical and tabular observational data from scientific literature
o Animal & plant density and diversity measures
o Population census measurements over time
• Descriptive statistics with measures of variation
• Understand measures of variation and their relevance
• Identify and account for sources of variation

What students do:
• Read tables and graphs of scientific data

Student active approaches:
• Peer learning: either groups or in pairs
• Use of student response systems (SRS, i.e clickers)

Skills:
• Distinguish observational versus experimental research/data
• Understand the difference between correlation and causation
• Interpret descriptive statistics
• Understand measures of variation and their relevance
• Identify and account for sources of variation
• Interpret data, evaluate possible explanations from the data; make conclusions

Authored by David Bos, Purdue University

Researchers should cite this work as follows:

• David Bos (2013), "Sources of Variation - Wolf reintroduction, David Bos," https://stemedhub.org/resources/1898.

  BibTex | EndNote

1. food web
2. hhmi
3. scientific data
4. variation
5. wolves