ECOLOGY AND THE ENVIRONMENT

Estes and Palmisano (1974), Estes et al. (1998) – Questions for Discussion

  1. Define a “keystone species”. (1pt)
  2. Explain how the orca-otter-urchin-kelp food web presented in these studies is an example of top-down control. (1pt)
  3. Define “anthropogenic”. What anthropogenic effect is most responsible for the situation with the sea otters? (1pt)
  4. Find and describe another example of a keystone predator creating top-down controls in an ecosystem. Include the predator species, the ecosystem, and how the ecosystem would be different in the absence of the predator species. (2pt)
  5. Estes and Palmisano 1974, Figure 1: What is this graph comparing? Why is there no line shown for vegetation at Shemya Island (hint: what does “coincident with the ordinate” mean)? (2pt)
  6. Estes and Palmisano 1974, Figure 2: Based on this graph, describe the difference in sea urchin size demographics between the two islands. Why are these differences important? (2pt)
  7. Why are kelp forests ecologically important? What ecosystem services do they provide to other species living in the region? What benefits can they provide to human societies? (3pt)
  8. Keystone species are often the focus of conservation efforts. Describe at least one benefit of this approach to conservation, as well as one potential risk or limitation to this approach. (3pt)
  9. Describe a potential strategy for bringing these kelp forest ecosystems back into balance. What might be a limitation or difficulty with implementing this strategy? (3pt)
  10. Write out the citations for both papers using Ecology formatting. (2pts)

–> Please read the two short articles to answer the questions, Also please read the other attached document to follow the ecology formatting.

Order a unique copy of this paper
(550 words)

Approximate price: $22

Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

We value our customers and so we ensure that what we do is 100% original..
With us you are guaranteed of quality work done by our qualified experts.Your information and everything that you do with us is kept completely confidential.

Money-back guarantee

At homeworkcheg.com, You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

The Product ordered is guaranteed to be original. Orders are checked by the most advanced anti-plagiarism software in the market to assure that the Product is 100% original. The Company has a zero tolerance policy for plagiarism.

Read more

Free-revision policy

The Free Revision policy is a courtesy service that the Company provides to help ensure Customer’s total satisfaction with the completed Order. To receive free revision the Company requires that the Customer provide the request within fourteen (14) days from the first completion date and within a period of thirty (30) days for dissertations.

Read more

Privacy policy

The Company is committed to protect the privacy of the Customer and it will never resell or share any of Customer’s personal information, including credit card data, with any third party. All the online transactions are processed through the secure and reliable online payment systems.

Read more

Fair-cooperation guarantee

By placing an order with at HomeworkCheg, you agree to the service we provide. We will endear to do all that it takes to deliver a comprehensive paper as per your requirements. We also count on your cooperation to ensure that we deliver on this mandate.

Read more

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency