Stability and Regime Change

1. Do the reading for this section, view the videos, and watch the lecture. Check the terms to see if you know the basic concepts and terminology of this section and be able to answer the questions. Now you are ready to begin preparing the quiz.

2. 1 In the Selkoe, et al. (2015) paper, the authors suggest there are 7 principles of ecosystem management that help address tipping points. They illustrate these points by looking at the Pacific kelp, sea urchins, sea otter ecosystem that has been studied by James Estes and his colleagues. The collapse of the Atlantic Cod in the Northern Atlantic including off the New England coast, our coast, and on the Grand Banks as well as the Eastern Atlantic was an ecological disaster on a global scale. There is still not agreement on the causes of collapse in 1992 and especially the recovery (or lack of one) since then. Overfishing and climate change both seem to have played a role. The collapse had serious socio-economic consequences in both the US and Canada.

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3. 2Identify the tipping points in the cod case study. (0.5)

4. 3 Apply the Selkoe principles to the cod collapse example and indicate which time period you are using: A. before the collapse or B. the present going forward. “A” is essentially what should have been done, and “B” is what could be done to manage this species and its ecosystem more successfully in the future. (0.5 pt. each = 3.5 pts.)

5. 4Describe how the cod collapse to the present is an example of Regime Change and explain which system measures you think are best to document Regime Change. (2 pt.)

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