read the two articles and answer the questions 3

read the two articles and answer the questions below :

  • What evidence is there that sea otters are a keystone species?
  • Explain how the killer whale-sea otter-urchin food web is an example of top-down control.
  • Explain the difference between Figure 2a and 2b from Estes and Palmisano (1974).
  • What are the benefits of large-scale/long-term approaches in ecological research?
  • Write out the citation for these journal articles using the format of the journal Ecology.
 
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