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Unformatted text preview: disease can spread rapidly. And that is what generally happens in Northern Canada unless food scarcity strikes first. Great numbers of rabbits die of disease. In a year or two the lynx find the woods empty. Starvation is now a problem. The lynx roam the woods, capturing what they can. Old hunting grounds are deserted; where there were dozens of rabbits there may be now none. New habitats are explored and hunting of new prey takes place. Lynx become thin and fail to reproduce, and in a year or two are scarce or absent over wide areas. Little by little, first slowly, then more rapidly, the rabbits come back and grow in numbers again. Lynx recover, too, and become more plentiful. The pattern of the rabbit and lynx cycles continues. (a) Draw a feedback diagram showing the rabbit-lynx cycle. Draw the diagram for the lynx first because it is simpler. (b) Next draw the diagram of what happens to the rabbits. (c) Fit the two diagrams together....
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This note was uploaded on 01/02/2010 for the course EMSE 235 taught by Professor Enriquescamposnanez during the Fall '08 term at GWU.
- Fall '08