Читать книгу Fundamentals of Conservation Biology - Malcolm L. Hunter Jr. - Страница 39

1 Given a choice between conserving an ecosystem that was functioning properly (as measured by productivity, nutrient cycling, and similar parameters) and one that had a complete set of native species, which would you choose? Why?

2 Is it desirable to increase alpha‐ and beta‐scale diversity if it can be done without apparently decreasing gamma‐scale diversity?

3 If you were managing a forested stream valley, would you consider putting a small dam on the stream to add a pond ecosystem to the valley? What if the pond would be inhabited by a globally endangered species of turtle?

4 Think of some places in which you have observed ecosystems change over time. How did these changes affect biodiversity? Can you identify examples of both positive and negative changes?