The material for this session is a little different, aiming at background on the scientific issues rather than background on the method. Do take a moment to look over the papers and short documentary. Do also review the previous references to make sure you are comfortable with group_by() and summarize() patterns.

Watch

• Background abbreviated documentary, features many of the leading authors on both sides https://vimeo.com/44104959

Read

• Original 2006 paper: Worm, B., Barbier, E. B., Beaumont, N., Duffy, J. E., Folke, C., Halpern, B. S., … Watson, R. (2006). Impacts of biodiversity loss on ocean ecosystem services. Science (New York, N.Y.), 314(5800), 787–90. https://doi.org/10.1126/science.1132294
• Overview of the database: Ricard, D., Minto, C., Jensen, O.P. and Baum, J.K. 2013. Evaluating the knowledge base and status of commercially exploited marine species with the RAM Legacy Stock Assessment Database. Fish and Fisheries 13 (4) 380-398. DOI: https://doi.org/10.1111/j.1467-2979.2011.00435.x
• Recent perspective piece: Worm, B. (2016). Averting a global fisheries disaster. Proceedings of the National Academy of Sciences, 201604008. https://doi.org/10.1073/pnas.1604008113